Honda Outdoor Motor BF40A Owner's Manual
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Honda Outdoor Motor BF40A Owner's Manual

Honda Outdoor Motor BF40A Owner's Manual

Honda power equipment outboard motor owner's manual
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Summary of Contents for Honda Outdoor Motor BF40A

  • Page 1 YCINOH vos/vowscda S,&3UMO -rUEkJlU pnuew...
  • Page 3 Thank you for purchasing a Honda Outboard Motor. This manuul describes the operation and maintenance of the Honda BF3SA BF4OA and BFWA Out- board Motors. All information in this publication is hased the latest product informa- tion available at the time of printing. Honda Motor Co..
  • Page 4 TYPES OF HONDA BF35A/40A/5OA OUTBOARD MOTORS It may hc necessary to rcfcr to this chart for reference purposes when reading this manual. TYPE CODE (example) T = Power Trimmilt R = Remote Control H = Tiller Handle X = Extra Long Shaft L = Long Shaft TT-II...
  • Page 5 , ,-in, RIGHT STERN BRACKET PRODUCT IDEliTiFICATION NUMBER Record the Product Identification and the Engine Serial Number (P.I.N.) Number for your reference. Refer to the Product Identification Number ordering parts, and when mak- when ing technical or warranty inquiries (see page 101). IDENTIFICATION STARTER MOTOR The Product Identification Number is...

  • Page 6: Table Of Contents

    CONTENTS 1. SAFETY SAFETY LABELS..6 ... 7 SAFETY INFORMATION 2. COMPONENT IDENTIFICATION 3. CONTROLS TILLER HANDLE TYPE Engine Start Button ... Shift Lever..Choke Knob..Throttle Grip..Throttle Opening Indicator ... Throttle Friction Knob ... Engine Stop Switch ...
  • Page 7 Fuel Line Connection ... 35 STARTING THE ENGINE (TILLER HANDLE TYPE)..37 STARTING THE ENGINE (REMOTE CONTROL TYPE)..41 Emergency Starting ... 44 Troubleshooting Starting Problems..49 6. OPERATION Break-in Procedure..50 TILLER HANDLE TYPE Gear Shifting ... Steering ...

  • Page 8: Safety

    1. SAFETY SAFETYLABELS These labels are in the locations show& They warn you of potential hazards that could seriously injure you. Read these labels carefully. EXTREMELY FLAMMABLE FUI USE As A lwu1 FIEI. ma.” -#+A” omT,IN EM UlTl twa coparm...

  • Page 9: Safety Information

    Stop the engine immediately if any one falls overboard. Do not run the motor while the boat is near anyone in the water. Attach the emergency stop switch lanyard securely to the operator. not remove the engine cover while the engine is running.

  • Page 10: Component Identification

    2. COMPONENT IDENTIFICATION THROTTLE GRIP FUEL LINE CONNECTOR ENGINE COVER LEVER I IP STERN ANTI-VENTILATION TRANSOM ANGLE (ANODE METAL) GEAR OIL LEVEL PLUG PROPELLER GEAR OIL DRAIN PLUG (TILLER HANDLE TYPE) OIL FILLER CAP OIL LEVEL GEAR SHIFT LEVER ENGINE OIL U.-I ENGINE START BUTTON...
  • Page 11 2. COMPONENT ENGINE COVER FUEL LINE POWER TILT CONNECTOR SWITCH COOLING SYSTEM INDICATOR ENGINE OIL / DRAIN BOLT M ANUA< ACCESS COVER RELIEF VALV GEAR OIL LEVEL PL EXHAUST PORT GEAR OIL DRAIN PLUG PROPELLER WASH PLUG (Flush plug) IDENTIFICATION OIL FI$LER CAP OIL LEVEL DIPSTIC...
  • Page 12 2. COMPONENT IDENTIFICATION POWER TRIM/TILT TYPES VENT KNOB FUEL GAUGE FUEL T FUEL CAP TACHOMETER FUEi FUEL HOSE CONNECTOR TRIM METER (FEMALE) PRIMER BULB...
  • Page 13 3. CONTROLS (TILLER HANDLE TYPE) Shift Lever (reveZse) SHIti LEVER There are three gearshift lever posi- tions. F (forward): The boat moves forward. N (neutral): The transmission gears are disengaged from the engine. R (reverse): The boat reverses. Choke Knob CHOti...

  • Page 14: Throttle Grip

    3. CONTROLS (TILLER HANIDLE TYPE) Throttle Grip THRO’ITLE GRIP Turn the grip clockwise or counter- clocktiise to adjust the engine speed. Turning the grip in the direction shown by the arrow increases engine speed. Throttle Opening Indicator THROTTLE OPENING INDICATOR The curve on the &tip indicates throttle opening.

  • Page 15: Engine Stop Switch

    Engine Stop Switch ENGINE STOP SWITCH Push the engine stop switch to stop the engine. Emergency Stop Switch Lanyard EMERGENCY STOP SWITCH CLIP The emergency stop switch lanyard is provided to stop the engine immedi- ately in the event the operator should fall overboard or away from the con- trols.

  • Page 16: Oil Pressure Indicator Light

    3. CONTROLS (TILLER HANDLE TYPE) SPARE EMERGENCY ,STOP SWITCH CLIP A spare emergency stop switch clip is provided near the engine stop switch. Oil Pressure Indicator Light OIL PRESSURE INDICATOR LIGHT The green oil pressure indicator light is normally ON when the outboard motor is running.

  • Page 17: Remote Control Lever

    (approximately 30’ from the N position) will engage the forward gear. Moving the lever further from the F position will increase the throttle opening and the boat for- ward speed. N (neutral): The engine idles and the transmis- sion gears are disengaged.

  • Page 18: Neutral Release Lever

    3. CONTROLS (REMOTE CONTROL TYPE) Neutral Release Lever The neutral release lever is on the remote control lever to prevent an accidental gear engagement. The remote control lever will not engage forward or reverse gear unless the neutral release lever is pulled up. Ignition Switch START + ON...

  • Page 19: Emergency Stop Switch Lanyard

    Emergency Stop Switch Lanyard The emergency stop switch lanyard is provided to stop the engine immedi- ately in the event the operator should fall overboard or away from the con- trols. The emergency stop switch clip must be engaged with the emergency engine stop switch or the engine will not start.

  • Page 20: Choke/Fast Idle Lever

    3. CONTROLS (REMOTE CONTROL TYPE) Choke/Fast Idle Lever f’-J CHOKE The choke/fast idle lever provides two functions: 1. Electric choke solenoid activation for easy engine start up. 2. Engine fast idle. The choke/fast idle lever will not move unless the remote control lever is in the N (neutral) position.

  • Page 21: Oil Pressure Indicator Light/Buzzer

    Oil Pressure Indicator Light/Buzzer The green oil pressure indicator light turns OFF and the buzzer sounds when the oil level is low and/or the engine lubrication system is faulty. The engine speed slows down gradual- 3. CONTROLS (REMOTE CONTROL TYPE) Overheat Indicator Light/Buzzer The red overheat indicator light turns ON and the buzzer sounds when the...

  • Page 22: Remote Control & Pqwer Trim/Tilt Type Power Trim/Tilt Switch (Remote Control Lever)

    The power trim/tilt switch located on the remote control lever can be operated while the boat is under way or while stopped. using the power trim/tilt switch the operator can change the trim angle of the motor to achieve maximum boat acceleration, speed, stability and maintain optimum fuel consumption.

  • Page 23: Power Tilt Switch (Motor Pan)

    This power tilt switch should only be oper- ated with the boat being stopped and motor off. Trim Meter TRIM METER The trim meter has a range of 0’ to 20”...

  • Page 24: Manual Relief Valve

    The tilt lever must be in the LOCK position before operating the motor or the motor could tilt up when operating in...

  • Page 25: Controls & Instruments (Common)

    Tilt Lock Lever Use the tilt lock lever to hold the motor in the highest tilt position when the boat is moored for a long time. Tilt the motor up as far as it will go then move the tilt lock lever into the lock position and gently lower the motor.

  • Page 26: Anode Metal

    3. CONTROLS d!k INSTRUMENTS Anode Metal Y----l The anodes are made from a sacrificial material which helps to protect the outboard motor from corrosion. (common) ANODiX bracket) (stem NOTICE] Painting or coating the anodes will lead to rust and corro- sion damage to the outboard motor.

  • Page 27: Water Intakes

    3. CONTROLS & INSTRUMENTS (common) Water Intakes WATER INTAKES The engine cooling water is drawn into the water pump through these water intakes.

  • Page 28: Transom Angle Adjusting Rod

    After installation pull the transom angle adjusting rod out- . ward to be sure it is locked in place. Start with the transom angle adjusting rod in the hole closest to the boat tran- (common) TRANSOM ANGLE ADJUSTING ROD...

  • Page 29: Fuel Cap/Gauge/Vent Knob

    Before transporting or storing the fuel tank turn the vent knob fully clock- wise to the closed position. Anytime the fuel tank is in the boat with the vent knob closed, discon- nect the fuel hose connector from the outboard motor (refer to page 35).

  • Page 30: Engine Cover Removal/Installation

    Engine Cover Removal/InstalIation (FRONT) ENGINE COVER LATCHES To remove, release the front and rear engine cover latches and remove the engine cover. To install, position the engine cover ovei the engine and hook and lpck the front and rear latches. (WAR)

  • Page 31: Pre-Operation Checks

    Engine Oil Engine oil is a major factor affecting engine performance and service life. Running the engine with insufficient oil can cause serious engine damage. Recommended oil Use high-detergent, premium quality 4-stroke engine oil, certified to meet or exceed U.S. automobile manufac- tures’...

  • Page 32: Fuel Level

    KEEP OUT OF REACH OF CHILDREN. VENTKNOB FUELCAP Refilling Remove the fuel tank from the boat for refilling. Turn the vent knob coun- terclockwise to the open position and remove the fuel cap. Refuel in a well-ventilated area. Fill the fuel tank up to the SAFE FILL level mark only.

  • Page 33: Fuel Recommendations

    Fuel Recommendations Use unleaded gasoline with a pump octane rating of 86 or higher. This engine is designed to operate on unleaded gasoline. Unleaded gasoline produces fewer engine and spark plug deposits and extends exhaust system life. Never use stale or contaminated gasoline or an oil/gaso- line mixture.

  • Page 34: Oxygenated Fuels

    4. PRE-OPERATION Oxygenated Fuels Some conventional gasolines are being blended with alco- hol or an ether compound. These gasolines are collec- tively referred to as oxygenated fuels. To meet clean air standards, some areas of the United States and Canada use oxygenated fuels to help reduce emissions.

  • Page 35: Propeller And Cotter Pin

    Propeller and Cotter pin COTTERPIN (stainless steel) Propeller Check the propeller blades for damage, wear or deformation and replace if necessary. Never operate the outboard motor with a damaged pro- peller. Carrying a spare propeller, propeller nuts, and cotter pins are common prac- tice.

  • Page 36: Remote Control Friction Adjustment

    Painting or coating the anodes will lead to rust and corro- sion damage to the outboard motor. The following materials should be kept with the boat: 1. Owner’s Manual. Tool Kit. 3. Spare engine oil, spark plugs, pro- peller, propeller cotter pins and nut.

  • Page 37: Starting The Engine

    Fuel Tank and Vent Knob VENT KNOB The fuel tank must be properly se- cured in the boat. This will protect the fuel tank from mechanical dam- age caused by the fuel tank shifting. The fuel tank must be in a well venti- lated area to reduce the chance of a gasoline vapo;...
  • Page 38 5. STARTING THE ENGINE FUEL HOSE CONNECTOR (OUTBOARD END) 2. Connect the fuel hose connector to the outboard motor. Install the outboard end fuel hose connector with the clip toward the outside. Be sure the fuel hose connector is securely snapped in place. 1 NOTICE 1 If the outboard end fuel hose connector is forcibly in- stalled in the reversed direction,...

  • Page 39: Starting The Engine (Tiller Handle Type)

    If the operator does not attach the emergency stop switch lanyard, and is thrown from his seat or out of the boat, the out-of-control boat can seri- ously injure the operator, pas- sengers, or bystanders. Always...
  • Page 40 5. STARTING THE ENGINE (TILLER HANDLE TYPE) THROlTIiE GRIP 3. Align the engine start symbol ” Q, ” on the throttle grip with the pointer ” w ” on the tiller handle. ’ CHOKE KNOB 4. When the engine is cold or ambient temperature is low pull the choke knob.
  • Page 41 5. STARTING THE ENGINE (TILLER HANDLE TYPE) CHO;E K\NO; 6. If it was necessary to use the choke knob to start the engine, slowly return it to its initial position. Turn the throttle grip in the SLOW direction to a position where the engine does not stall.
  • Page 42 5. STARTING THE ENGINE (TILLER HANDLE TYPE) OIL PRESSURE NORMAL: GREEN LIGHT ON ABNORMAL: GREEN LIGHT BLINKING OR OFF 8. With the engine running, check to see if the green engine oil pressure indicator light turns ON. Stop the engine if the oil pressure indicator light does not turn ON.

  • Page 43: Starting The Engine (Remote Control Type)

    STOP SWITCH CLIP If the operator does not attach the emergency stop switch lanyard, and is thrown from his seat or out of the boat, the out-of-control boat can seri- ously injure the operator, pas- sengers, or bystanders. Always properly...
  • Page 44 5. STARTING THE ENGINE (REMOTE CONTROL TYPE) 3. When the engine is cold or the ambient temperature is low, lift the choke/fast idle lever up fully. This will provide a rich fuel mixture. When the engine is warm, it may be raise the choke/fast idle necessary to lever slightly.
  • Page 45 5. STARTING THE ENGINE (REMOTE CONTROL TYPE) COOLING SYSTEM X’JDICATOR WATER INTAKE (each side) 6. After the engine starts, verify water is flowing through the cooling system by monitoring the cooling system indica- tor. The amount of water coming out of the cooling sys- tem indicator will vary due to thermostat operation.

  • Page 46: Emergency Starting

    5. STARTING THE ENGINE Emergency Starting (FRONT) ENGINE COVER LATCHES If the electric starting system will start the engine the engine can be emergency started by using the pull rope from the tool kit. 1. Release the front and rear engine cover latches then remove the engine cover.
  • Page 47 SHti LEVER (TILLER HANDLE TYPE) 3. Depending on what type of out- board motor you have, move the shift lever or the control lever to the N (neutral) position. 5. STARTING THE ENGINE (neutral) (REMOTE CONTROL TYPE) ENGINE STOP SWITCH - EMEkGENCY SPARE EMERGENCC STOP SWITCH...
  • Page 48 5. STARTltNG THE ENGINE OFF$ IGNITI EMERGENCY STOP SWITCH CLIP 5. If your outboard motor is a remote control type, turn the ignition key to the ON position. Engage the emer- gency stop switch clip, locatedat one end of the emergency stop switch lanyard, with the emergency engine stop switch.
  • Page 49 (REMOTE CONTROL TYPE) If the fuel system is working properly, it should only be necessary to pull the engine 1 or 2 times with the choke knob out. 5. STARTING THE ENGINE ENGINE START SYMBOL POIN-TER THROTTLE GRIP (TILLER HANDLE TYPE) 7.
  • Page 50 Lock the engine cover latches. Attach the emergency stop switch lanyard securely to the operator and return to the closest boat landing. Contact your closest authorized Honda Marine dealer and have the out- board motor and the electrical sys-...

  • Page 51: Troubleshooting Starting Problems

    “ikoubleshooting Starting Problems SYMPTOM POSSIBLE CAUSE Starter motor 1. Shift lever not in doesn’t mm neutral position. over. 2. Blown fuse. 3. Weak battery. 1. Emergency stop switch clip is not engaged. Starter motor 2. Out of fuel turns over but engine will not 3.

  • Page 52: Break-In Procedure

    First 15 minutes: Run the outboard motor at trolling speed. Use the minimum amount of throttle opening necessary to operate the boat at a safe trolling speed. Next 45 minutes: Run the outboard motor up to a maximum of 2,000 to 3,000 rpm or 10% to 30% throttle opening.

  • Page 53: Operation

    Gear Shifting FAST POINTER Gearshift lever has 3 positions: FORWARD, NEUTRAL, and REVERSE. An indicator at the base of the gearshift lever aligns with the letters F, N, and R on the motor pan. 1. Align the pointer on the tiller han- dle with the SLOW position on the throttle grip to decrease engine speed.

  • Page 54: Steering

    The tiller handle is moved in the oppo- site direction in which you want the boat to turn. Cruising THRO&LE GRIP With the gearshift lever in the F (for- ward) position, turn the throttle grip toward the FAST mark to increase speed.

  • Page 55: Gear Shifting

    (reverse) to engage the desired gear. 6. OPERATION (REMOTE CONTROL TYPE) (neutral) OPENING Moving the control lever further from 30” will increase throttle opening and boat speed. (neutral) (reverse) i 30” The control lever will not move unless the neutral release lever is pulled up and choke/fast idle lever is in the lowest position.

  • Page 56: Cruising

    2. Move the control lever from N (neutral) 30’ toward F (forward) to engage the F (forward) gear. Moving the control lever further from 30’ will increase the throttle opening and boat speed. 3. For optimum fuel economy, limit throttle opening to 2/3.

  • Page 57: Gas Assisted Tilt Type

    Tilt Lever GEARSHIFT Tilt the motor up to prevent the pro- peller and gear case from hitting the bottom when beaching or stopping in shallow water. 1. Move the gearshift lever to the N ( neutral) position and stop the engine.
  • Page 58 3. With the outboard motor tilted up to the desired position, move the tilt lever to the LOCK position to lock the motor. To lower the back down, motor move the tilt lever to the FREE position, while holding the engine cover grip, then lower the motor gently.
  • Page 59 TILT LOCK Use the tilt lock lever to hold the motor in the highest tilt position when the boat is moored for a long time. 1. Move the tilt lever to the FREE position (refer to page 56), then pull the engine cover grip and tilt the motor all the way up.

  • Page 60: Power Trim/Tilt Type

    Motor trim angle adjustment is necessary to compensate for boat load or weight distribution, water conditions, pro- peller or engine condition. The motor trim angle can be adjusted while...

  • Page 61: Power Trim/Tilt Type Trim Meter

    The trim meter indicates the trim angle of the motor. Refer to the trim meter, and press the UP or DN portion of the power trim/tilt switch to adjust. the motor trim angle to achieve boat performance and stability. BOW TOO LOW DUE TO 1.

  • Page 62: Power Tilt Switch (Motor Pan)

    This power tilt switch should only be operated when the boat is stopped and the motor is off. TYPE) Manual Relief Valve .IEF...

  • Page 63: Tilt Lock Lever

    LEVER Tilt Lock Lever Use the tilt lock lever when the boat is moored. 1. Tilt the motor up as far as it will go using the power trim/tilt switch. 2. Move the tilt lock lever to the LOCK position and lower the out-...

  • Page 64: Trim Tab Adjustment

    Distribute the load evenly in the boat and run the boat in a straight course at full throttle. Slightly turn the steering wheel or tiller handle for both right and’...

  • Page 65: Engine Oil Pressure And Overheat Warning System

    Engine Oil Pressure and Overheat Warning System If the engine oil pressure drops andfor the engine overheats, either or both warning systems could be activated. When activated the engine speed will decrease gradually and the green oil pressure indicator light will turn OFF and’the red overheat indicator light will turn ON.
  • Page 66 This’could cause the oil pressure warning system to activate momentarily. 3. If the oil pressure warning system stays activated after 30 seconds, return to the closest boat landing and contact your closest authorized Honda Marine dealer. SYSTEM) COOLING SYSTEM INDICATOR...

  • Page 67: Over-Rev Limiter

    Over-Rev Limiter This outboard motor is equipped with an engine over-rev limiter which acti- vates when the engine speed increases excessively. The over-rev limiter can be activated while cruising, tilting up the motor, or when ventilation occurs during a sharp turn. When the over-rev limiter is activated: 1 .Reduce the throttle opening immedi- ately and check the trim angle.

  • Page 68: Anodes

    6. OPERATION (MOTOR PROTECTION When the power trim warning system is activated: 1. Immediately decrease the trim angle by pressing the DN portion of the power trim/tilt switch. 2. Immediately reduce the tiottle opening to SLOW and Operate the engine at low speed. SYSTEM) Anodes The anodes are a skxificial material...

  • Page 69: Shallow Water Operation

    Shallow Water Operation -[Excessive trim/tilt angle during operation can cause the pro- peller to raise out of the water and cause propeller ventilation and engine over-revving. Excessive trim/tilt angle can also damage the water pump and overheat the engine. When operating in shallow water, tilt the motor up to prevent the propeller and gear case from hitting the bottom (refer to pages 55 and 58).

  • Page 70: High Altitude Operation

    6. OPERATION High Altitude Operation At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel con- sumption will increase. A very rich mixture will also foul the spark plugs and cause hard starting. High altitude performance can be improved by specific modifications to the carburetors.

  • Page 71: Stopping The Engine Tiller Handle Type

    7. STOPPING THE ENGINE (TILLER Emergency Engine Stop ENGINE STOP SWITCH EMERGENCY STOP SWITCH LANYARD L SWITCH CLIP Disengage the emergency stop switch clip from the engine stop switch by pulling the emergency stop switch lan- yard. It is a good idea to stop the engine with the emergency stop switch lanyard from time to time to be sure that the switch is operating properly.
  • Page 72 7. STOPPING THE ENGINE (TILLEIR HANDLE TYPE) PUSH 2. Push the engine stop switch until the engine stops.

  • Page 73: Remote Control Type

    Normal Engine Stop N (neutral) 1. Move the control lever to the N (neutral) position and turn the igni- tion key to the OFF position. IGNITION KEY When the boat is not in use, remove and store the ignition key.

  • Page 74: Transporting

    8. TRANSPORTING Trailering STEERING FRICTION When trailering or transporting the boat with the motor attached, it is recommended that the motor remain in the normal run position. Tighten the steering friction adjuster se- curely lo stop the motor’s side to side tiovement.

  • Page 75: Cleaning And Flushing

    WASH PLUG (flush plug) Thoroughly clean and flush the out- board motor with fresh water after operating in dirty or salty water. Flush Kit (optional part) 1. Wash the outside of the outboard motor with clean, fresh water. 2. Remove the wash plug and sealing washer from the WASH plug hole in the gear case.
  • Page 76 9. CLEANING AND FLUSHING CdoLINb SYSTEM INDICATOR 7. Start the engine. Monitor the cool- ing system indicator. Stop the engine if water does not come out of the cooling system indicator and check the fresh water supply. If the fresh water supply is insufficient it may be necessary to temporarily cover the three water intakes with duct tape.

  • Page 77: 10. Maintenance

    Periodic maintenance and adjustment are important to keep the motor in the best operating condition. Service and inspect according to the MAINTENA- NCE SCHEDULE. Stop the engine before performing any maintenance. If it is necessary to run the engine make sure the area is well ventilated. Never run the engine in an enclosed or confined area.

  • Page 78: Tool Kit And Spare Parts

    10. MAINTENANCE Tool Kit and Spare Parts The following tools and spare parts are supplied with the outboard motor for maintenance, adjustment, and emergency repairs. TOOL KIT 10 x 12 WRENCH WRENCZI FLAT SCREWDRIVER -==n PHILLIPS SCREWDRIVER SCREWDRIVER HANDLE OIL CHECK SCREWDRIVER PLIERS TOOL BAG 18 x 19...

  • Page 79: Maintenance Schedule

    MAINTENANCE SCHEDULE Use only genuine HONDA parts or their equivalent for maintenance or repair. Replacement parts which are not of equivalent quality may damage the motor. REGULAR SERVICE PERIOD (3) Performed at every indicated month or operating hour intervals, whichever comes first. Engine oil Check level Change...
  • Page 80 10. MAINTENANCE REGULAR SERVICE PERIOD (3) Perform at every indicated month or operating intervals, hour, whichever comes first. Fuel tank and filter ClCUl (Replace if necessary) filter Fuel filter Check Chanee l%ermostat Check Fuel line Check (Replace if necessary) Check-refilling (if necessary) Battee fluid Cable connection Check-tightness Check-tighmess...

  • Page 81: Engine Oil

    Engine Oil Engine oil is a major factor affecting engine performance and service life. Oil check interval: Each use. Oil change interval: After the first 20 hours, then every 100 hours. (Refer to the mainte- nance schedule page 77). OIL CAPACITY: 2.1 US qt (2.0 lit)...When oil filter is not replaced 2.5 US qt (2.4 lit)...When oil filter is...
  • Page 82 10. MAINTENANCE DHAINPLUG 2. Loosen the drain plug cover screw using a flat blade screwdriver and remove the drain plug cover. 3. Place the drain plug cover as shown to use it as an oil drain guide. Place a suitable contaiuer under the guide. 4.

  • Page 83: Gear Oil

    7. Refill to the upper level mark on the oil level dipstick with the recom- mended oil. NOTE: To ,avoid incorrect gauging of the engine oil level, inspect the oil level when the engine has cooled. The outboard motor needs to be in the vertical position.
  • Page 84 10. ‘MAINTENANCE LEVEL PLUG Gear Oil Level/Check 1. Position the outboard motor verti- cally. 2. Remove the level plug and see if oil flows out. If no oil flows out, fill through the drain plug hole until the oil starts to flow out through the level plug hole.

  • Page 85: Spark Plugs

    Spark Plugs To ensure proper engine operation, the spark plugs must be properly gapped and free of deposits. Check-replace interval: After the first 20 hours, then every 200 hours. (Refer to the mainte- nance schedule page 77). Recommended spark plug: DR7EA (NGK), X22ESR-U (NIPPON DENSO) Use only the recommended spark...

  • Page 86: Battery (Not Included)

    Check the battery cables to be sure they are securely connected to the bat- tery terminals. lighten if necessary. If the battery terminals are corroded or if recharging is necessary, remove the battery from the boat to clean or recharge.
  • Page 87 1. Disconnect the negative ( - ) battery cable first, then disconnect the posi- tive (+) battery cable. 2. Remove the battery from the boat. Clean the battery terminals with a wire brush or sand paper. Clean the battery with a solution of baking soda...

  • Page 88: Lubrication

    Secured away from the fuel tank to avoid potential sparks near the fuel tank. 1. Return the battery to the boat and install it in the battery box. 2. Connect the positive (+) battery cable first, then connect the nega- tive (-) battery cable.

  • Page 89: Engine Fuel Filter

    Engine Fuel Filter FUEL FILTER The engine fuel filter is located under the engine cover between the fuel cou- pling and the fuel pump. Water or sediment accumulated in the fuel filter can cause loss of power or hard start- ing.
  • Page 90 10. MAINTENANCE Pull the spring retainer toward you, and raise the fuel filter. 4. Check the fuel filter for water accu- mulation or sediment. If no water or sediment are found, reinstall the fuel filter properly. FUEL HOSES Change 1. Remove the fuel filter. Before removing the fuel filter.

  • Page 91: Fuel Tank And Filter

    4. Securely connect the fuel hose con- nector to the outboard motor page 5. Prime the engine using the primer bilb page 36. Check for fuel leaks. Repair any fuel leaks if necessary. If loss of power or hard starting are found to be caused by excessive water or sediment accumulation in the fuel filter, inspect the fuel tank.

  • Page 92: Fuse Replacement

    lO.:MAINTENANCE FUEL TANK HOSE CONNECTOR FUEL TANK FILTER Fuel Tank Filter Cleaning/Replacement Turn the fuel tank hose connector counterclockwise to remove the fuel tank filter. 2. Clean the fuel tank filter with non- flammable cleaner or solvent. Replace the fuel tank filter if neces- sary* 3.

  • Page 93: Propeller

    Propeller MARINE GREASE 45i!i If the propeller is damaged, replace it as follows: ECIAL SPLINE WASHER PROPELLER THRUST WASHER Removal: Remove the cotter pin then remove the 16 mm castle nut, 17 mm plain washer, 10 mm special spline washer, propeller and thrust washer.

  • Page 94: Submerged Motor

    10. MAINTENANCE Submerged Motor A submerged motor must be serv- iced immediately after it is recov- ered’from the water inorder to mimumize corrosion. Immediately take the outboard mo- tor to the closest authorized Honda Marine dealer or if you are far from a dehlership, proceed as follows: I.
  • Page 95 8. Engage the emergency stop switch clip with the emergency stop switch and attempt to start the engine (be sure the water level is at least 2 inches above the anti-ventilation plate). If the engine fails to start, re- move the spark plugs, clean and dry the electrodes, then re- install the spark plugs and at- tempt to start the engine again.

  • Page 96: I 1. Storage

    lit STORAGE For longer service life of the outboard motor,‘have your outboard motor ser- viced by an authorized Honda Marine dealer before storage. If you are unable to take the motor to your dealer, proceed as follows: Draining the Carburetors Gasoline extremely flammable,...
  • Page 97 Fuel Tank VENT KNOB FUEL CAP 1. Close the fuel cap vent knob. 2. Disconnect the fuel coupling from the outboard motor (refer to page 35). Outboard Motor Position Transport and store the motor either vertically or horizontally, as shown above.

  • Page 98: 12.8 Troubleshooting

    12.8 TROUBLESHOOTING (1) Engine does not start. Fuel There is no gasoline Fuel is not fed - in fuel tank. to carburetor. Vent knob is not open or vent clogged. Fuel filter is clogged. Fuel line is kinked. Fuel line is connected improperly.
  • Page 99 (2) Engine starts but immediately stops. Engine some times stops while cruising. Fuel No gasoline in fuel tank. Water is mixed with There is gasoline - gasoline. in fuel tank. Vent knob is not open or vent is clogged. Fuel filter is clogged. Air screw is open too wide.

  • Page 100: 13. Specifications

    13. SPECIFICATIONS MODEL Long shaft: BLAG Dtscription Code Type Overall length (685 mm) Overall width 14.6 in (370 mm) Overall height 53.6 in ( 1,360 mm) Transom height 20.5 in (520 mm) Weight 203 lb (92 kg) Rated power 35 HP (26. I kW) Full throttle 4,600 - 5,600 ‘pm range...
  • Page 101 MODEL BF40A Description Code Long shaft: BAYL Extra long shaft: BAYU Type Overall length 28.6 in 27.0 in (725 mm) (685 mm) Overall width 14.6 in (370 mm) Overall height 53.6 in (1,360 mm) 57.5 in (1,460 mm) Transom height 20.5 in (520 mm) 24.5 in (622 mm) Weight...
  • Page 102 13. ,SPECHFICATIONS Overall length 27.0 in (685 mm) Ov,erall width 14.6 in (370 mm) Full throttle 5,500 - 6,000 rpm range Engine type 4 stroke OHC in-line 3 cylinder Disolacement 49.3 cu. in (808 cc) 0.024 - 0.028 in (0.6 - 0.7 mm) Spark plug gap Starter system Ignition system...

  • Page 103: Warranty Service

    General Manager. In order to contact the Honda Marine Customer Service Office, you can write to: American Honda Motor Co., Inc. Honda Power Equipment Division Customer Service Office 4475 River Green Parkway Duluth, GA 30136-2565 Or telephone: (404) 497-6400 We will need the following informa-...
  • Page 104 Current customer service contact information: Your owner's manual was written to cover most of the questions you might ask about your Honda. Any questions not answered in the owner's manual can be answered by your Honda dealer. If your dealer doesn't have an immediate answer, they should be able to get it for you.

  • Page 105: 15. Wiring Diagram

    15. WIRING DIAGRAM TILLER HANDLE TYPE DITm...
  • Page 106 15. WIRING DIAGRAM REMOTE CONTROL TYPE...
  • Page 107 15. WIRING DIAGRAM CONTROL, REMOTE POWER TRIM/TILT TYPE r---------------’ XRTA type outboard HP I -------------_ BF35A outboard...

  • Page 108: 16. Index

    Anode Metal ... PRE-OPERATION CHECK ... 34 MOTOR PROTECTION SYSTEM..66 Battery (not included) ... Break-in Procedure ... Choke Knob ... Choke/Fast Idle Lever..CLEANING AND FLUSHING ... 73 COMPONENT IDENTIFICATION ... 8 CONTROLS & INSTRUMENTS (common) ... 23 CONTROLS GAS ASSISTED TILT TYPE ...
  • Page 109 16., INDEX Oil Pressure Indicator Light..Oil Pressure Indicator Light/Buzzer ... 19 Other Checks ... Over-Rev Limiter..Overheat Indicator Light..Overheat Indicator Light/Buzzer ... Oxygenated Fuels ... Power Tilt Switch (Motor Pan) CONTROLS..OPERATION ... Power Trim Warning System ... 65 Power Trim Tilt Switch (remote control lever) ...
  • Page 110 Trim Tab Adjustment ............62 Troubleshooting .

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Bf50aBf35aMarine bf40a

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