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The information and specifications included in this publication were in effect at the time of approval for printing. Honda Motor Co., Ltd. reserves the right, however, to discontinue or change specifications or design at any time without notice and without incurring any obligation whatever.
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INTRODUCTION Congratulations on your selection of We suggest you read the warranty a Honda outboard motor. We are  policy to fully understand its  certain you will be pleased with your coverage and your responsibilities of purchase of one of the finest ...
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INTRODUCTION A FEW WORDS ABOUT You will find important safety information in a variety of forms, including: SAFETY • Safety Labels — on the outboard motor. Your safety and the safety of others and one of  are very important. And using this •...
Page 5: Table Of Contents

CONTENTS OUTBOARD MOTOR SAFETY ........7 TRL (Trolling) Control Switch IMPORTANT SAFETY INFORMATION....7 [optional equipment]...........31 SAFETY LABEL LOCATION........9 Power Trim/Tilt Switch ........32 Power Tilt Switch ..........33 CONTROLS AND FEATURES ........13 Manual Relief Valve..........33 CONTROL AND FEATURE IDENTIFICATION Tilt Lock Lever.............34 CODES..............
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CONTENTS INDICATORS............36 OPERATION..............47 Alternator (ACG) Indicator........36 SAFE OPERATING PRECAUTIONS .....47 BREAK-IN PROCEDURE........47 Malfunction Indicator........... 36 PORTABLE FUEL TANK (optional equipment) ..48 Oil Pressure Indicator........... 37 FUEL HOSE CONNECTIONS.........48 Overheat Indicator..........37 FUEL PRIMING............50 Cooling System Indicator........38 INFREQUENT OR OCCASIONAL USE ....50 OTHER FEATURES ..........
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CONTENTS SERVICING YOUR OUTBOARD MOTOR....73 CLEANING AND FLUSHING........103 THE IMPORTANCE OF MAINTENANCE.... 73 Cleaning and Flushing ..........103 MAINTENANCE SAFETY........74 TOOL KIT and OWNER’S MANUAL ....75 STORAGE ..............105 EMERGENCY STARTER ROPE ......75 Fuel ..............105 MAINTENANCE SCHEDULE........ 76 Engine Oil............107 TRIM TAB ADJUSTMENT........
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Battery ..............123 Emission Control System Information ....123 Star Label ..............126 Specifications ............128 CONSUMER INFORMATION........131 Honda Publications..........131 Customer Service Information ........ 131 Warranty Statements ..........134 Distributor’s Limited Warranty....... 134 Emission Control System Warranty ......139 Distributor’s Warranty ..........
Page 9: Outboard Motor Safety

• Attach the emergency stop switch INFORMATION lanyard securely to the operator. • It is the operator’s responsibility to The Honda BF75D/BF90D outboard • Always wear a PFD (Personal provide the necessary safeguards to motors are designed for use with protect people and property.
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OUTBOARD MOTOR SAFETY Refuel With Care Carbon Monoxide Hazard • Gasoline is extremely flammable, Exhaust contains poisonous carbon and gasoline vapor can explode. monoxide, a colorless, odorless gas. Refuel outdoors, in a well- Breathing carbon monoxide can ventilated area, with the engine cause loss of consciousness and may stopped.
Page 11: Safety Label Location

The labels shown here contain important safety information. Please read them carefully. These labels are considered permanent parts of your outboard motor. If a label comes off or becomes hard to read, contact an authorized Honda Marine dealer for a replacement.
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The labels shown here contain important safety information. Please read them carefully. These labels are considered permanent parts of your outboard motor. If a label comes off or becomes hard to read, contact an authorized Honda Marine dealer for a replacement.
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OUTBOARD MOTOR SAFETY PORTABLE FUEL TANK  (optional equipment) FUEL CAUTION (LRTC and XRTC types)
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• Gasoline is harmful or fatal  ignite. If any fuel is spilled, if swallowed. Keep the fuel make sure that the area is • Honda outboard motor is tank out of reach of  dry before starting the designed to give safe and children.
Page 15: Controls And Features

CONTROLS AND FEATURES CONTROL AND FEATURE IDENTIFICATION CODES Model BF75D BF90D Type LRTA LRTC LRTA LRTC XRTA XRTC Transom Height 21.1 in (537 mm)     (Shaft Length) 26.1 in (664 mm)   Remote Control  ...
Page 16: Component And Control Locations

CONTROLS AND FEATURES COMPONENT AND CONTROL LOCATIONS ENGINE COVER OIL LEVEL DIPSTICK OIL FILLER CAP ENGINE COVER LATCH (rear) NMEA INTERFACE ENGINE COVER SPARK PLUG COUPLER LATCH (front) (under ignition coil) POWER TILT SWITCH IDLE PORT TILT LOCK LEVER STERN COOLING SYSTEM BRACKET INDICATOR...
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CONTROLS AND FEATURES Remote Controls (equipped type or optional equipment) (SIDE-MOUNT REMOTE CONTROL) GEARSHIFT/THROTTLE CONTROL LEVER NEUTRAL RELEASE LEVER INDICATORS  (Oil pressure, Overheat, POWER TRIM/TILT Alternator, Malfunction) SWITCH FAST IDLE LEVER SPARE EMERGENCY STOP SWITCH CLIP BUZZER (inside) IGNITION SWITCH IGNITION SWITCH EMERGENCY STOP SWITCH...
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CONTROLS AND FEATURES (PANEL-MOUNT REMOTE CONTROL) GEARSHIFT/THROTTLE CONTROL LEVER NEUTRAL RELEASE LEVER POWER TRIM/TILT SWITCH FAST IDLE BUTTON CONTROL PANEL (for PANEL-MOUNT type) INDICATORS  (Oil pressure, Overheat, Alternator, Malfunction) BUZZER IGNITION SWITCH EMERGENCY EMERGENCY STOP STOP SWITCH SWITCH CLIP EMERGENCY STOP SWITCH LANYARD...
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CONTROLS AND FEATURES (SINGLE TOP-MOUNT REMOTE CONTROL) (DUAL TOP-MOUNT REMOTE CONTROL) GEARSHIFT/THROTTLE GEARSHIFT/THROTTLE CONTROL LEVER CONTROL LEVERS POWER TRIM/TILT SWITCH (RIGHT) POWER TRIM/TILT POWER TRIM/TILT SWITCH SWITCH (LEFT) FAST IDLE FAST IDLE BUTTON BUTTON CONTROL PANEL  (for TOP-MOUNT DUAL type) (for TOP-MOUNT SINGLE type) INDICATORS ...
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CONTROLS AND FEATURES Portable Fuel Tank (optional equipment) Fuel Tank Hose Assembly (standard equipment) FUEL GAUGE FUEL HOSE CONNECTOR FUEL TANK FUEL FILLER CAP VENT KNOB FUEL TANK HOSE ASSEMBLY FUEL HOSE JOINT (outboard motor side) FUEL PRIMING BULB...
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CONTROLS AND FEATURES Trim Meter Tachometer TRL (Trolling) Control Switch [standard equipment [standard equipment Panel (LRTC and XRTC types)] (LRTC and XRTC types)] (optional equipment) [optional equipment (LRTA and [optional equipment (LRTA and XRTA types)] XRTA types)] TRL (Trolling) CONTROL SWITCH...
Page 22: Controls

CONTROLS AND FEATURES CONTROLS Emergency Stop Switch Clip and Turning the ignition switch key to the START position operates the starter Emergency Stop Switch Side-Mount Type motor. The key automatically returns EMERGENCY STOP SWITCH to the ON position when released Ignition Switch from the START position.
Page 23: Gearshift/throttle Control Lever

CONTROLS AND FEATURES Gearshift/Throttle Control Lever The emergency stop switch clip must A spare switch clip is stored in a slot be inserted in the emergency stop in the control housing. GEARSHIFT/THROTTLE switch in order for the engine to start CONTROL LEVER and run.
Page 24: Fast Idle Lever

CONTROLS AND FEATURES Fast Idle Lever N (NEUTRAL) 30° 30° FAST IDLE LEVER F (FORWARD) R (REVERSE) SHIFT SHIFT MINIMUM MINIMUM THROTTLE OPENING THROTTLE OPENING MAXIMUM MAXIMUM GEARSHIFT/THROTTLE CONTROL LEVER Use the fast idle lever to accelerate engine warm-up after starting the Moving the control lever 30°...
Page 25: Panel-mount Type

CONTROLS AND FEATURES Panel-Mount Type Turning the ignition switch key to the N (neutral) START position operates the starter Ignition Switch motor. The key automatically returns MAXIMUM FAST IDLE to the ON position when released START from the START position. LOWEST The ignition switch can be used to POSITION...
Page 26: Emergency Stop Switch Clip And Emergency Stop Switch

CONTROLS AND FEATURES Emergency Stop Switch Clip and The emergency stop switch clip must be inserted in the emergency stop Emergency Stop Switch switch in order for the engine to start EMERGENCY STOP SWITCH and run. The emergency stop switch lanyard must be attached securely to the operator or to the operator’s PFD (Personal Flotation Device).
Page 27: Gearshift/throttle Control Lever

CONTROLS AND FEATURES Gearshift/Throttle Control Lever N (NEUTRAL) GEARSHIFT/THROTTLE 35° 35° F (FORWARD) CONTROL LEVER R (REVERSE) SHIFT SHIFT MINIMUM MINIMUM THROTTLE OPENING THROTTLE OPENING MAXIMUM NEUTRAL RELEASE LEVER MAXIMUM GEARSHIFT/THROTTLE CONTROL LEVER The gearshift/throttle control lever Moving the control lever 35° from N A friction adjuster near the base of controls engine speed and selects F (neutral) selects the gear, and further...
Page 28: Fast Idle Button

CONTROLS AND FEATURES Fast Idle Button It is necessary to position the control N (neutral) lever in the N (neutral) position to F (forward) R (reverse) push in the fast idle button. Return the control lever to N (neutral) position to cancel the fast idle operation.
Page 29: Top-mount Type

CONTROLS AND FEATURES Top-Mount Type Emergency Stop Switch Clip and Turning the ignition switch key to the START position operates the starter Emergency Stop Switch Ignition Switch motor. The key automatically returns EMERGENCY STOP SWITCH to the ON position when released START from the START position.
Page 30: Gearshift/throttle Control Lever

CONTROLS AND FEATURES Gearshift/Throttle Control Lever The emergency stop switch clip must The gearshift/throttle control lever(s) be inserted in the emergency stop controls engine speed and selects F SINGLE TYPE switch in order for the engine to start (forward), N (neutral), or R (reverse) and run.
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CONTROLS AND FEATURES Moving the control lever 35° from N N (NEUTRAL) (neutral) selects the gear, and further movement increases engine speed. 35° 35° R (REVERSE) F (FORWARD) A friction adjuster inside the control SHIFT SHIFT box adjusts the operating resistance of the control lever(s).
Page 32: Fast Idle Button

CONTROLS AND FEATURES Fast Idle Button It is necessary to position the control N (neutral) lever in the N (neutral) position to F (forward) push in the fast idle button. R (reverse) Return the control lever to N (neutral) position to cancel the fast idle operation.
Page 33: Trl (trolling) Control Switch [optional Equipment]

CONTROLS AND FEATURES TRL (Trolling) Control Switch  (optional equipment) SWITCH PANEL TROLLING CONTROL SWITCH The Trolling Control Switch is a rocker switch with UP and DN (down) positions to adjust the trolling speed up or down in 50 rpm increments within the range of 650 to 1,000 rpm.
Page 34: Power Trim/tilt Switch

CONTROLS AND FEATURES Power Trim/Tilt Switch The power trim/tilt switch is located on the control lever. It is a rocker switch with UP and DN (down) (side-mount type) (top-mount single type) positions for changing the angle of the outboard motor. POWER TRIM/TILT SWITCH You can use the power trim/tilt switch anytime whether the boat is...
Page 35: Power Tilt Switch

CONTROLS AND FEATURES Power Tilt Switch Manual Relief Valve (engine pan side) POWER MANUAL (To fix) (To release) MANUAL RELIEF VALVE POWER TILT SWITCH The outboard motor can be tilted The power tilt switch is located on the manually after opening the manual engine pan.
Page 36: Tilt Lock Lever

CONTROLS AND FEATURES Tilt Lock Lever Engine Cover Latch Trim Tab (front/rear) GEAR CASE GROMMET ENGINE COVER LATCHES  FREE (front/rear) UNLATCH LOCK TRIM TAB BOLT TRIM TAB STERN BRACKET The engine cover latch fastens the TILT LOCK LEVER The trim tab compensates for “torque engine cover to the outboard motor.
Page 37: Instruments

CONTROLS AND FEATURES INSTRUMENTS Tachometer Fuel Gauge [standard equipment  (optional equipment) (LRTC and XRTC types)] Trim Meter [optional equipment (LRTA and FUEL GAUGE [standard equipment  XRTA types)] (LRTC and XRTC types)] [optional equipment (LRTA and XRTA types)] The tachometer shows engine speed in revolutions per minute.
Page 38: Indicators

If an indicator does not light during this (RED) test, it cannot alert you if that system (RED) develops a problem. Have your Honda Marine dealer check for BUZZER BUZZER burned-out bulbs or other problems. Under normal conditions, the (panel-mount/top-mount types)
Page 39: Oil Pressure Indicator

CONTROLS AND FEATURES Oil Pressure Indicator Overheat Indicator When the oil pressure indicator is lit, oil pressure is OK. (side-mount type) (side-mount type) OVERHEAT OIL PRESSURE If oil pressure becomes low, the INDICATOR INDICATOR indicator will turn off, and the engine protection system will limit engine speed.
Page 40: Cooling System Indicator

CONTROLS AND FEATURES Cooling System Indicator When the alert triggers, the overheat indicator comes on and the buzzer COOLING SYSTEM INDICATOR sounds a steady tone as the engine speed is reduced to 1,800 rpm. If the condition persists for another 20 seconds, the engine shuts off.
Page 41: Other Features

CONTROLS AND FEATURES OTHER FEATURES Overrev Limiter Portable Fuel Tank (optional equipment) The engine is equipped with an Water Separator Buzzer PORTABLE FUEL TANK overrev limiter to prevent the The water separator buzzer sounds a possibility of mechanical damage rapid, repeating signal when water from excessive engine speed.
Page 42: Fuel Filler Cap Vent Knob

CONTROLS AND FEATURES Fuel Filler Cap Vent Knob Fuel Priming Bulb VENT KNOB OPEN OUTLET END (outboard motor side) CLOSE PRIMING BULB FUEL FILLER CAP INLET END (fuel tank side) The fuel filler cap is provided with a A priming bulb is built into the fuel vent knob to seal the portable fuel hose that connects the fuel tank to the tank for carrying it to and from the...
Page 43: Anodes

CONTROLS AND FEATURES Anodes ANODE  ANODE (stern bracket) (each side) The anodes are made of a sacrificial material that helps to protect the outboard motor from corrosion. There are two anodes on the gear case, one on the stern bracket and two small anodes in the water passages of the engine block.
Page 44: Nmea Interface Coupler

CONTROLS AND FEATURES NMEA Interface Coupler Operating Hour Notification Periodic maintenance is required System when either the operating hours or the time since last maintenance reaches NMEA INTERFACE COUPLER This outboard motor engine counts the prescribed limit. Therefore, the number of operating hours since periodic maintenance may be the last periodic maintenance.
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CONTROLS AND FEATURES <Operating hour notification timing> NMEA2000-compatible display: • Follow instructions for the display. • If the display allows selection of notification to be preset, select Every 100 hours “Notify” (or equivalent). • Turn on the power supply to the 80 hours 100 hours hours...
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CONTROLS AND FEATURES When “Periodic Maintenance” is indicated: 1. Have the periodic maintenance performed without delay after returning to port. 2. Reset the hour counter.  If not reset, the maintenance indication will remain in the display, and the hour count until the next maintenance will be in error.
Page 47: Before Operation

Be sure to take care of any problem Familiarize yourself with all laws and you find, or have your authorized regulations relating to boating and the Honda Marine dealer correct it, use of outboard motors. before you operate the outboard motor.
Page 48: Safety Inspection

BEFORE OPERATION Safety Inspection • Check that all fasteners are in place • Make sure a tool kit and the and securely tightened. emergency starter rope are onboard • Before each use, look around and (p.75). Replace any missing items. •...
Page 49: Operation

OPERATION SAFE OPERATING  BREAK-IN PROCEDURE Next 60 minutes: PRECAUTIONS Run the engine up to a maximum of Break-in period: 10 hours 4,000 to 5,000 rpm, which is about To safely realize the full potential of 50% to 80% of maximum throttle this outboard motor, you need a Proper break-in operation allows the opening.
Page 50: Portable Fuel Tank (optional Equipment)

OPERATION PORTABLE FUEL TANK FUEL HOSE CONNECTIONS Secure the portable fuel tank in the (optional equipment) boat so that it won't move around and Turn the portable fuel tank vent knob PORTABLE FUEL TANK become damaged. counterclockwise to the open position.
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OPERATION (Using the fuel tank mounted on FUEL HOSE CONNECTOR FUEL HOSE BARB the boat) (outboard motor side) FUEL HOSE ASSEMBLY (optional equipment) (outboard motor side) FUEL HOSE (fuel tank side) HOSE CLAMP BARB (stainless steel) HOSE CLAMP PRIMING (stainless steel) ARROW BULB (fuel tank side)
Page 52: Fuel Priming

OPERATION FUEL PRIMING INFREQUENT OR Do not touch the priming bulb with OCCASIONAL USE the engine running or when tilting up If you are using a portable fuel tank, the outboard motor. The vapor If your outboard motor will be used turn the portable fuel tank vent knob separator could overflow.
Page 53: Starting The Engine

OPERATION STARTING THE ENGINE 1. Put the emergency stop switch clip N (neutral) in the emergency stop switch, and Control Page securely to the operator or to the Side-Mount Type ......51 operator’s PFD (Personal Flotation Device). Panel-Mount Type ......54 Top-Mount Type ......56 The engine will not start or run unless the emergency stop switch Side-Mount Type...
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OPERATION If the engine fails to start within 5 seconds, release the key and wait at START least 10 seconds before operating FAST IDLE the starter again. RANGE LOWEST POSITION • Using the electric starter for more than 5 seconds at a time will overheat the starter motor and can damage it.
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OPERATION During the warm-up period, check the oil pressure indicator (p.37), MAXIMUM FAST IDLE • If the engine is not properly overheat indicator (p.37), and warmed up before raising the FAST IDLE cooling system indicator (p.38). engine speed, the buzzer and RANGE overheat indicator may activate If the indicators show any...
Page 56: Panel-mount Type

OPERATION Panel-Mount Type The engine will not start or run N (neutral) unless the emergency stop switch EMERGENCY STOP SWITCH clip is in the emergency stop switch. The emergency stop switch clip and emergency stop switch lanyard system is a safety device that will stop the engine if you fall away from the controls while operating CONTROL...
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OPERATION If the engine fails to start within 5 START seconds, release the key and wait at N (neutral) least 10 seconds before operating the starter again. • Using the electric starter for more than 5 seconds at a time will overheat the starter motor and can damage it.
Page 58: Top-mount Type

OPERATION Top-Mount Type During the warm-up period, check the oil pressure indicator (p.37), • If the engine is not properly EMERGENCY STOP SWITCH overheat indicator (p.37), and warmed up before raising the cooling system indicator (p.38). engine speed, the buzzer and overheat indicator may activate If the indicators show any and the engine speed will be...
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OPERATION The engine will not start or run unless START N (neutral) the emergency stop switch clip is in the emergency stop switch. The emergency stop switch clip and emergency stop switch lanyard system is a safety device that will stop the engine if you fall away from CONTROL the controls while operating the boat.
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OPERATION If the engine fails to start within 5 N (neutral) seconds, release the key and wait at • If the engine is not properly least 10 seconds before operating warmed up before raising the the starter again. engine speed, the buzzer and overheat indicator may activate and the engine speed will be CONTROL...
Page 61: Emergency Starting

OPERATION EMERGENCY STARTING During the warm-up period, check 6 × 25 mm the oil pressure indicator (p.37), FLANGE BOLT If the battery is discharged or the ALTERNATOR overheat indicator (p.37), and COVER cooling system indicator (p.38). starter motor is inoperative, you can 6 mm WASHER start the engine manually using the If the indicators show any...
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OPERATION 5. Secure the breather tube to the 8. Pull the emergency starter rope EMERGENCY clamp of the silencer case. slowly until resistance is felt, then STARTER pull briskly. Direction ROPE Take care not to lose the bolt and to pull Keep away from moving parts washer.
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 operating the outboard motor. 12. Have your closest authorized Honda Marine dealer check your electrical system and correct the problem so that you can use the electric starter.
Page 64: Stopping The Engine

OPERATION STOPPING THE ENGINE Panel-Mount/Top-Mount Types EMERGENCY CONTROL PANEL Emergency Engine Stopping STOP SWITCH EMERGENCY Side-Mount Type STOP SWITCH LANYARD EMERGENCY STOP SWITCH PULL EMERGENCY STOP SWITCH LANYARD EMERGENCY STOP SWITCH CLIP PULL To stop the engine in an emergency, pull the emergency stop switch clip out of the emergency stop switch by EMERGENCY STOP SWITCH CLIP...
Page 65: Normal Engine Stopping

OPERATION Normal Engine Stopping Top-Mount Type Side-Mount Type N (neutral) N (neutral) CONTROL LEVER CONTROL LEVER 1. Move the control lever to the N  Panel-Mount Type (neutral) position. N (neutral) After cruising at full throttle, cool down the engine by idling for a few minutes before stopping the engine.
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OPERATION Side-Mount Type 2. Turn the ignition switch key to the OFF position to stop the engine.  In the event that the engine does not stop when the ignition switch key is turned to the OFF position, pull the emergency stop switch  clip out of the emergency stop switch by pulling the emergency stop switch lanyard (p.62).
Page 67: Gearshift And Throttle Operation

OPERATION GEARSHIFT AND  Panel-Mount Type To shift gears, move the control lever THROTTLE OPERATION to select the F (forward), N (neutral), N (neutral) or R (reverse) gear. Side-Mount Type F (forward) R (reverse) CONTROL LEVER The control lever cannot be moved from the N (neutral) position unless the neutral release lever is squeezed NEUTRAL...
Page 68: Steering

OPERATION Side-Mount Type Top-Mount Type STEERING Steer the boat in the same manner as an automobile. TO INCREASE FRICTION TO INCREASE FRICTION CONTROL TO DECREASE LEVER FRICTION TO DECREASE FRICTION FRICTION ADJUSTER Panel-Mount Type CONTROL LEVER FRICTION ADJUSTER CONTROL LEVER FRICTION ADJUSTER Adjust the control lever friction adjuster so the control lever will hold...
Page 69: Cruising

OPERATION CRUISING If engine speed becomes unstable at It is necessary to trim the angle of the high speed due to activation of the outboard motor to compensate for Engine Speed overrev limiter, reduce speed and changes in boat load, weight check the trim angle of the outboard distribution, water conditions, or For best fuel economy, limit the...
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OPERATION Side-Mount Type Top-Mount Type OUTBOARD OUTBOARD (single type) MOTOR MOTOR TRIMMED TOO TRIMMED TOO POWER TRIM/TILT HIGH SWITCH CONTROL LEVER OUTBOARD MOTOR TRIMMED CORRECTLY (dual type) POWER CONTROL TRIM/TILT POWER TRIM/TILT SWITCH LEVER SWITCH (LEFT) (RIGHT) Panel-Mount Type BOW TOO LOW DUE TO POWER TRIM/TILT SWITCH 1.
Page 71

OPERATION DN: Reduce engine speed  Trolling Speed Control the Trolling Speed Control is (optional equipment) UP: Increase engine speed deactivated. If 3,000 rpm is not reached and the throttle is closed, the SWITCH PANEL Place the outboard motor in-gear with engine speed will decrease to the the throttle control in the fully closed Trolling Speed Control setting.
Page 72: Shallow Water Operation

OPERATION Trim Tab When the trim tab is correctly adjusted, steering effort will be equal An excessive trim/tilt angle during If steering effort is not equal in both in both directions. operation can cause propeller directions, adjust the trim tab to ventilation, overheating, and water compensate for “torque steer,”...
Page 73: Mooring, Beaching, Launching

OPERATION MOORING, BEACHING, To lower the outboard motor, tilt up (lock position) LAUNCHING using the power tilt switch, then move the tilt lock lever to the FREE Before tilting up, leave the outboard position, and then lower the outboard motor in the running position for one motor to the desired position.
Page 74: Multiple Outboard Motors

OPERATION Be sure the valve is closed before MULTIPLE OUTBOARD POWER MANUAL MOTORS operating the outboard motor. If the (To fix) (To release) valve is not closed, the outboard On boats equipped with more than motor will tilt up when operated in one outboard motor, all motors reverse.
Page 75: Servicing Your Outboard Motor

Genuine parts or their equivalents for special tools are best handled by repair and replacement. professionals and are normally Improperly maintaining  performed by a Honda technician or Maintenance, replacement, or this outboard motor or  other qualified mechanic. failure to correct a problem repair of the emission control before operation can cause ...
Page 76: Maintenance Safety

SERVICING YOUR OUTBOARD MOTOR MAINTENANCE SAFETY Safety Precautions • Read the instructions before you begin, and make sure you have the Some of the most important safety • Make sure the engine is off before tools and skills required. precautions follow. However, we you begin any maintenance or repairs.
Page 77: Tool Kit And Owner's Manual

SERVICING YOUR OUTBOARD MOTOR TOOL KIT and OWNER’S MANUAL EMERGENCY STARTER ROPE 8 × 10 mm WRENCH SPARK PLUG WRENCH PHILLIPS SCREWDRIVER 18 × 19 mm BOX WRENCH EMERGENCY STARTER ROPE GRIP FUSE PULLER TOOL BAG OWNER’S MANUAL An emergency starter rope is supplied.
Page 78: Maintenance Schedule

(1) Lubricate more frequently when used in salt water. (2) These items should be serviced by your servicing dealer, unless you have the proper tools and are mechanically proficient. Refer to the Honda shop manual for service procedures. See “Honda Publications” on page 131 for ordering information.
Page 79

Shift cable Check-adjust These items should be serviced by your servicing dealer, unless you have the proper tools and are mechanically proficient. Refer to the Honda shop manual for service procedures. See “Honda Publications” on page 131 for ordering information.
Page 80: Trim Tab Adjustment

SERVICING YOUR OUTBOARD MOTOR TRIM TAB ADJUSTMENT RIGHT The trim tab compensates for “torque steer,” which is a reaction of the LEFT outboard motor to propeller rotation. TRIM TAB BOLT If uncompensated, torque steer would TRIM TAB BOLT make the outboard motor tend to turn to one side.
Page 81: Manual Relief Valve

SERVICING YOUR OUTBOARD MOTOR MANUAL RELIEF VALVE ENGINE COVER REMOVAL Check that nobody is under the AND INSTALLATION outboard motor before opening the POWER MANUAL manual relief valve. If the manual (To fix) (To release) relief valve is loosened (turned counterclockwise) when the outboard ENGINE COVER...
Page 82: Engine Oil Level Check

SERVICING YOUR OUTBOARD MOTOR Engine Oil Level Check 3. Insert the dipstick all the way in, and then remove it and check the Check the engine oil level with the oil level shown on the dipstick. engine stopped and the outboard 4.
Page 83

SERVICING YOUR OUTBOARD MOTOR Oil filler cap removal (Unlock): 5. Install the oil filler cap and tighten it securely. Do not overtighten. OIL FILLER CAP Rib of the alternator Oil filler cap installation (Lock): cover 1)Insert the oil filler cap into the oil filler port with the lug being set horizontally.
Page 84: Engine Oil Change

SERVICING YOUR OUTBOARD MOTOR Engine Oil Change DRAIN BOLT Improper disposal of engine oil can An engine oil evacuation device may SEALING WASHER be harmful to the environment. If you be used to remove the engine oil. (Replace) change your own oil, please dispose Drain the used oil while the engine is of the used oil properly.
Page 85: Oil Filter Change

SERVICING YOUR OUTBOARD MOTOR Oil Filter Change 4. With the outboard motor in a 64 mm FILTER WRENCH vertical position, fill to the upper 1. Drain the engine oil, and reinstall limit mark on the oil level dipstick the drain bolt (see Engine Oil (p.80) with the recommended oil.
Page 86: Engine Oil Recommendations

4-stroke detergent oil. If you are changing the oil filter SAE Viscosity Grade Use only a Honda Genuine oil filter while the outboard motor is out of or a filter of equivalent quality the water, use commercially ...
Page 87: Spark Plug Service

SERVICING YOUR OUTBOARD MOTOR Spark Plug Service 6 × 20 mm  CONNECTOR FLANGE SH BOLT <Standard spark plug> LOCK TAB RECOMMENDED SPARK PLUG: IGNITION ZFR6K-9E (NGK) COIL Incorrect spark plugs can cause engine damage. See page 87 for instructions of handing the iridium spark plugs PLUG MAINTENANCE COVER (optional parts).
Page 88

SERVICING YOUR OUTBOARD MOTOR SIDE ELECTRODE BOX WRENCH New plug Plug needing replacement 0.031 – 0.035 in (0.8 – 0.9 mm) SEALING WASHER INSULATOR 6. Inspect the spark plugs. Replace them if the electrodes are worn, or if the insulators are cracked or chipped.
Page 89

SERVICING YOUR OUTBOARD MOTOR 8. Install the spark plugs carefully, by 10. Install the ignition coil. Reinstall These spark plugs have an iridium the 6 25 mm flange bolt. coated center electrode.  hand, to avoid cross-threading. Be sure to observe the following 9.
Page 90: Lubrication Points

Apply anticorrosion oil to pivot TILT SHAFT surfaces where grease cannot penetrate. PROPELLER SHAFT SWIVEL CASE THRUST RECEIVER Apply Honda Marine Corrosion Inhibitor (or equivalent) to all areas under the engine cover and any exposed metal surfaces except the belts.
Page 91

SERVICING YOUR OUTBOARD MOTOR SHIFT LINK BRACKET/ SHIFT PIVOT/SHIFT ARM/ LINK PIN/PIVOT PLATE/ TILT LOCK LEVER SLIDE PIVOT/ (each side) TILT SHAFT THREAD CLICK SPRING ROLLER UPPER CYLINDER PIN/BUSHING MOUNT FRAME LOWER CYLINDER BUSHING/COLLAR SWIVEL SHAFT...
Page 92: Refueling

FUEL GAUGE If you do not anticipate cycling OPEN through at least one complete tank of fuel within a 30 day period, we recommend adding Honda Marine Fuel Stabilizer each time you refuel. Portable Fuel Tank (optional equipment) FUEL TANK CAPACITY:...
Page 93

SERVICING YOUR OUTBOARD MOTOR Using the fuel tank mounted in 3. Press down the pressure relief tab, SAFE FILL LEVEL and then turn the fuel filler cap 1/4 the boat. turn counterclockwise. Release the pressure relief tab. Wait to relieve Check the fuel level and refill if pressure.
Page 94: Fuel Recommendations

SERVICING YOUR OUTBOARD MOTOR FUEL RECOMMENDATIONS You may use unleaded gasoline containing no more than 10% ethanol Gasoline is highly flammable Use unleaded gasoline with a pump (E10) or 5% methanol by volume. In and explosive. octane rating of 86 or higher. addition, methanol must contain cosolvents and corrosion inhibitors.
Page 95: Water Separator Inspection And Service

Check the water 2. Remove the separator assembly. If separator periodically. Clean it or it is difficult to remove the consult with an authorized Honda separator assembly by yourself, consult an authorized Honda outboard motor dealer for cleaning.
Page 96

SERVICING YOUR OUTBOARD MOTOR HOSE CLIPS HARNESS WATER LEVEL SENSOR WATER (commercially available) CLIP 2 pin CONNECTOR SEPARATOR WATER BRACKET SEPARATOR CLIP C WATER SEPARATOR SUSPENSION STRAP FUEL HOSES 4. Remove the suspension strap from 5. Open the harness clip and remove 3.
Page 97

SERVICING YOUR OUTBOARD MOTOR • Assemble so the flat part on the WATER LEVEL POSITIONING back of the suspension is parallel to BAFFLE SENSOR 2 pin BAND PLATE the water separator joint as shown CONNECTOR HARNESS below. O-RING CLIP (Replace) BODY Assemble so the flat part of the suspension and the water separator joint...
Page 98: Fuel Filter Inspection And Replacement

SERVICING YOUR OUTBOARD MOTOR Fuel Filter Inspection and 12. Prime the engine using the Replacement priming bulb (p.50). Check for fuel leaks. Gasoline is highly flammable The fuel filter (inside the strainer cup) Repair any fuel leaks if necessary. and explosive. is located between the fuel pump and If the buzzer sounds or excessive the water separator.
Page 99

1. Remove the engine cover (p. 79). assembly by yourself, consult an side of the fuel filter. authorized Honda Marine dealer. 2. Looking through the translucent strainer cup, check the fuel filter 5. Disconnect the fuel hoses from the for water accumulation and fuel filter.
Page 100

SERVICING YOUR OUTBOARD MOTOR 10. Prime the engine using the FUEL FILTER priming bulb (p.50). Check for (inside strainer cup) fuel leaks. Repair any fuel leaks if FUEL INTAKE necessary. SIDE JOINT 11. Install the engine cover. If loss of power or hard starting are EDGE AT found to be caused by excessive THE BASE...
Page 101: Portable Fuel Tank And Tank Filter Cleaning (optional Equipment)

SERVICING YOUR OUTBOARD MOTOR Portable Fuel Tank and Tank Fuel Tank Fuel Tank Filter Filter Cleaning CONNECTOR 5 mm SCREWS (4) (optional equipment) GASKET Gasoline is highly  flammable and explosive. You can be burned or seriously injured when  FUEL TANK handling fuel.
Page 102: Anode Replacement

SERVICING YOUR OUTBOARD MOTOR Anode Replacement Propeller Replacement Painting or coating the anodes will Before replacing the propeller, defeat their purpose and will lead to remove the emergency stop switch rust and corrosion damage to the clip from the emergency stop switch outboard motor.
Page 103

 TIGHTENING TORQUE LIMIT: 1. Apply marine grade grease to the 33 lbf·ft (44.1 N·m, 4.5 kgf·m)  • Use a Honda Genuine stainless propeller shaft. steel cotter pin or equivalent Do not tighten the castle nut above cotter pin and bend the pin ends 2.
Page 104: Inspect After Operating

SERVICING YOUR OUTBOARD MOTOR Inspect After Operating 1. Stop the engine and remove the engine cover (p.79). 2. Confirm the cooling water leakage from the engine.
Page 105: Cleaning And Flushing

Do not run the engine when flushing HO2 SENSOR Touch up any damaged paint, and the outboard motor with a garden coat areas that may rust with Honda hose or the outboard motor may be Corrosion Inhibitor, or equivalent. damaged.
Page 106

CLEANING AND FLUSHING FLUSH PORT GARDEN HOSE FLUSH PORT CONNECTOR CONNECTOR FLUSH PORT GARDEN HOSE JOINT CONNECTOR (commercially available) EXHAUST PORT 5. Screw the flush port connector onto the garden hose. 6. Turn on the fresh water supply and flush the outboard motor for at least 10 minutes.
Page 107: Storage

15 15 days and may cause damage to the days, if the gasoline was not fresh 2. Add Honda Marine fuel stabilizer fuel system. Please check with your when you filled the fuel tank.
Page 108

You can be burned or life by filling the fuel tank with VAPOR SEPARATOR fresh gasoline and adding Honda seriously injured when VAPOR SEPARATOR Marine fuel stabilizer following the handling fuel.
Page 109: Engine Oil

STORAGE Engine Oil HOISTING THE OUTBOARD 4. After the outboard motor is placed MOTOR in storage and disconnected from 1. Change the engine oil and the oil the hoist, install the engine cover. filter (p.82-84). HOIST HOOKS STORAGE PRECAUTIONS 2. Remove the spark plugs (p.85), and remove the emergency stop switch Select a well-ventilated storage area.
Page 110: Removal From Storage

STORAGE REMOVAL FROM STORAGE CUSHION (protective material) Check your outboard motor as described in the BEFORE OPERATION chapter of this manual. If the cylinders were coated with oil during storage preparation, the engine may smoke briefly at startup. This is normal.
Page 111: Transporting

TRANSPORTING WITH OUTBOARD MOTOR WITH OUTBOARD MOTOR The preferred method is to leave the INSTALLED ON BOAT REMOVED FROM BOAT engine in the normal running position, but if there is insufficient road When trailering a boat with the Secure the outboard motor in either clearance, you can tilt the outboard outboard motor attached, always the vertical or horizontal position...
Page 112: Taking Care Of Unexpected Problems

TAKING CARE OF UNEXPECTED PROBLEMS ENGINE WILL NOT START Possible Cause Correction Clip not inserted in emergency stop switch. Insert clip in emergency stop switch. Control lever not in neutral position. Shift to neutral. Fast idle lever raised (side-mount type). Leave fast idle lever OFF (p.52).
Page 113

TAKING CARE OF UNEXPECTED PROBLEMS ENGINE WILL NOT START Possible Cause Correction Out of fuel. Refuel (p.90). Fuel hose not primed. Squeeze priming bulb (p.50). Fuel filter or fuel tank filter clogged. Replace fuel filters (p.96). Bad fuel; outboard motor stored without treating or Drain fuel tank and vapor separator (p.105).
Page 114

Use starting procedure (p.51, 54, 56); if engine still will malfunction, stuck valves, starter malfunction, switch not start, then take outboard motor to an authorized malfunction, or electrical problem in the starting circuit, Honda Marine dealer, or refer to the shop manual. etc.
Page 115: Hard Starting Or Stalls After Starting

TAKING CARE OF UNEXPECTED PROBLEMS HARD STARTING OR STALLS AFTER STARTING Possible Cause Correction Fast idle lever raised (side-mount type). Leave fast idle lever OFF (p.52). Fuel hose not primed. Squeeze priming bulb (p.50). Fuel filter or fuel tank clogged. Replace fuel filters (p.96).
Page 116: Engine Overheats

Correction Spark plugs faulty, fouled, or improperly gapped. Replace spark plugs (p.85). Fuel system malfunction, fuel pump failure, ignition Take outboard motor to an authorized Honda Marine malfunction, etc. dealer, or refer to the shop manual. ENGINE OVERHEATS Possible Cause Correction Water intake screens clogged.
Page 117: Fuses

TAKING CARE OF UNEXPECTED PROBLEMS FUSES Fuse Replacement FUSE CASE LID SPARE FUSES (10 A, 15 A, 30 A) Electric Starter Will Not  Operate Disconnect the battery cable at the battery negative (-) terminal before The 10 A, 15 A, and 30 A main fuses ...
Page 118

If a fuse is outboard motor to an authorized blown, install a replacement fuse of Honda Marine dealer for inspection the same specified rating. The outboard motor is supplied with and service, or refer to the shop spare fuses in the fuse holder.
Page 119: Oil Pressure Indicator Turns Off And Engine Speed Is Limited

TAKING CARE OF UNEXPECTED PROBLEMS OIL PRESSURE INDICATOR 4. Remove the old fuse by removing If oil pressure becomes low, the oil TURNS OFF AND ENGINE two 5 mm screws. pressure indicator will turn off, and SPEED IS LIMITED the engine protection system limits 5.
Page 120: Overheat Indicator Comes On And Engine Speed Is Limited

OVERHEAT INDICATOR an authorized Honda Marine dealer. If the engine is stopped after running at full throttle, and then restarted soon afterward, that could activate the (RED) engine protection system momentarily.
Page 121: Water Separator Buzzer Sounds

93, or consult activated after 30 seconds, return to with an authorized Honda Marine the nearest boat landing, and have the dealer. outboard motor inspected by an...
Page 122: Submerged Outboard Motor

If there is a Honda Marine dealership 4. Remove the spark plugs (p.85). supply water. nearby, take the outboard motor to the Operate the starter to expel water dealer immediately.
Page 123

2 inches (5 cm) above the antiventilation plate  to avoid overheating and water pump damage. 7. As soon as possible, take the outboard motor to an authorized Honda Marine dealer for inspection and service.
Page 124: Technical Information

TECHNICAL INFORMATION Serial Number Locations FRAME SERIAL NUMBER ENGINE SERIAL NUMBER Record the product identification number, the engine serial number, and the date of purchase in the space provided on this page. You will need these numbers when ordering parts and when making technical or warranty inquiries (p.
Page 125: Battery

WARNING: Battery posts, terminals, toxic. will damage the battery-charging and related accessories contain lead system in the outboard motor. Honda utilizes appropriate air/fuel and lead compounds. Wash your • Do not disconnect the battery ratios and other emissions control hands after handling.
Page 126

• Removal or alteration of any part Honda engine within the emission of the intake, fuel, or exhaust standards. systems. • Alterations that would cause the engine to operate outside its design parameters.
Page 127

California emission regulations. assumption that your machine will be engine inspected and repaired by your We recommend the use of Honda used for its designed purpose. servicing dealer. Genuine parts whenever you have Sustained high-load operation, or use maintenance done.
Page 128: Star Label

TECHNICAL INFORMATION Star Label The Star Label means Cleaner Marine Engine US, Puerto Rico, and US Virgin Islands This engine has been certified as a: A Star label was applied to this outboard motor in accordance with the requirements of the California Air Resources Board.
Page 129

TECHNICAL INFORMATION The one-star label identifies engines that meet the Air Resources Board’s Personal Watercraft and Outboard marine engine 2001 exhaust emission One Star standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines. These engines are equivalent to Emission the U.S.
Page 130: Specifications

Tilt up angle Full transistor battery Ignition system 8°, 12°, 16°, 20°, 24° Transom angle Lubrication Trochoid pump pressure lubrication system * With propeller Honda outboard motors are power rated in accordance with NMMA procedures and using the ICOMIA standard 28/23.
Page 131

Starter system 8°, 12°, 16°, 20°, 24° Transom angle Full transistor battery Ignition system Lubrication Trochoid pump pressure lubrication system * With propeller Honda outboard motors are power rated in accordance with NMMA procedures and using the ICOMIA standard 28/23.
Page 132

TECHNICAL INFORMATION BF75D/BF90D Tune up 0.031-0.035 in (0.8-0.9 mm) See page 86 Spark plug gap  See shop manual Idle speed 50 rpm  Intake: 0.17 0.02 mm See shop manual Valve clearance (cold)  Exhaust: 0.28 0.02 mm No other adjustment is needed...
Page 133: Consumer Information

Service Manager or the lubricants) to enhance your boating dealership’s owner.  maintaining and repairing your experience. If you need to contact Honda outboard motor. Visit http://marine.honda.com and regarding your experiences with your click on PARTS & ACCESSORIES...
Page 134

Please include the following deterioration associated with using information in your communication: your Honda outboard motor. Your new Honda is covered by the following warranties: • Your name, address and telephone Your warranty coverage will not be number (complete with area code) voided if you choose to perform your •...
Page 135

(such as spark plug(s), water pump, contact the owner of the dealership or etc.). their designated representative. As the owner of a Honda product, your servicing dealer may ask you to authorize an inspection. If the problem is covered under warranty, your dealer will perform any warranty repairs for you at no cost.
Page 136: Warranty Statements

CONSUMER INFORMATION Warranty Statements The American Honda Distributor’s Limited Warranty applies to outboards purchased in the United States, Puerto Rico, or the U.S. Virgin Islands. The Honda Canada Distributor’s Warranty applies to outboards purchased in Canada. The product warranty is only valid in the country where the product was purchased.
Page 137

What American Honda Will Repair or Replace Under Warranty: However, if you should require further assistance, write or American Honda will repair or replace, at its option, any call the Honda Marine Customer Relations. Please see part that is proven to be defective in material or Contacting Honda page 131.
Page 138

• Parts affected or damaged by an abuse, submersion and/ limitation of implied warranties: or collision American Honda disclaims any responsibility for loss of • Normal wear and tear time or use of the outboard, revenue, or the equipment in •...
Page 139

CONSUMER INFORMATION Accessories and Replacement Parts This warranty is limited to Honda Marine parts, accessories and apparel when distributed by American Honda Motor Co.,  Inc., 1919 Torrance Blvd., Torrance, California 90501-2746. Products Covered by Warranty: Length of Warranty: (from date of original retail purchase)
Page 140

CONSUMER INFORMATION To Obtain Warranty Service: any other incidental or consequential damage. Any You must, at your expense, take the Honda Outboard implied warranties are limited to the duration of this Motor product accessory or replacement part or the written warranty. Some states do not allow limitations on...
Page 141: Emission Control System Warranty

Emission Control System Warranty abuse, neglect, or improper maintenance of your outboard engine. Your new Honda outboard engine complies with both the Your emission control system may include parts such as U.S. EPA and State of California emission regulations. the carburetor or fuel injection system, the ignition American Honda provides the same emission warranty system, and catalytic converter.
Page 142

American Honda Motor Co., Inc. cannot deny warranty solely for the Honda Motor Co., Inc. A list of warranty parts is on page lack of receipts or your failure to ensure the performance 142.
Page 143

American Honda Motor Co., parts which are affected or damaged by owner abuse, Inc. to sell and service that Honda marine product during neglect, improper maintenance, misuse, misfueling, its normal business hours. Claims for repair or adjustment...
Page 144

CONSUMER INFORMATION EMISSION CONTROL SYSTEM WARRANTY PARTS: SYSTEMS COVERED PARTS DESCRIPTION: BY THIS WARRANTY: Fuel Metering Carburetor assembly, Throttle body, Fuel injector, Fuel pump, Fuel pressure regulator, Throttle position sensor, Intake air temperature sensor, Engine temperature sensor, Manifold absolute pressure sensor, Idle air control valve, Barometric pressure sensor, Fuel line solenoid valve, Intake manifold, Intake valves, and Oxygen sensor or Air fuel ratio sensor Evaporative...
Page 145: Distributor's Warranty

Canada Inc. and/or Honda Motor Co. Ltd., as appropriate an authorized Honda dealer which has been registered at from the context. the time of purchase on a form provided by Honda, which has had set-up and pre-delivery service HONDA WARRANTS THAT each new Honda marine...
Page 146

Honda Marine dealership. If you are unable to obtain or e) Normal maintenance services, including tightening of are dissatisfied with the warranty service you receive, ...
Page 147

WARRANTY are the only and the entire written warranties given by Honda for Marine engines. No dealer or his agent or employee is authorized to extend or enlarge on these warranties on behalf of Honda by any written or verbal statement or advertisement.
Page 148: Index

INDEX Emergency Stop Switch Clip and Emergency Stop  Alternator (ACG) Indicator ........... 36 Anodes................41 Switch Replacement ............100 Panel-Mount Type........... 24 ARE YOU READY TO GET UNDERWAY? ..... 45 Side-Mount Type ............ 20 Top-Mount Type ............. 27 Battery ................ 123 Emission Control System Information ......
Page 149

Panel-Mount Type ..........26 STARTING ............113 Top-Mount Type ............ 30 HOISTING THE OUTBOARD MOTOR ....107 Fast Idle Lever............... 22 Honda Publications ............. 131 Fuel Filler Cap Vent Knob..........40 Ignition Switch Filter Inspection and Replacement......96 Panel-Mount Type ..........23 Gauge [optional equipment] ........
Page 150

INDEX NMEA Interface Coupler ..........42 SAFE OPERATING PRECAUTIONS ......47 SAFETY LABEL LOCATION ........9 Oil Pressure Indicator ............ 37 Serial Number Locations ..........122 OIL PRESSURE INDICATOR TURNS OFF AND SERVICING YOUR OUTBOARD MOTOR ....73 ENGINE SPEED IS LIMITED ......117 SHALLOW WATER OPERATION ......
Page 151

INDEX Tachometer Warranty Statements ........... 134 [standard equipment (LRTC and XRTC types)], Water Separator Buzzer ..........39 [optional equipment (LRTA and XRTA types)]..35 WATER SEPARATOR BUZZER SOUNDS ..... 119 TAKING CARE OF UNEXPECTED PROBLEMS... 110 Water Separator Inspection and Service ....... 93 TECHNICAL INFORMATION .........
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MEMO...
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MEMO...
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MEMO...
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31ZY9630 2eY1500.2013.10 00X31-ZY9-6300 Printed in China...

This manual also for:

Bf90d, Bf100d