Honda Marine BF25A Owner's Manual
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Honda Marine BF25A Owner's Manual

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  • Page 3 Honda Outboard Motors are designed Thank you for purchasing a Honda READ THIS OWNER’S MANUAL to give safe and dependable service if CAREFULLY. Pay special attention to Outboard Motor. operated according to instructions. these symbols and any instructions Operating this Outboard Motor This manual describes the operation that follow.
  • Page 4 TYPES OF HONDA BF25A/30A OUTBOARD MOTORS It may be necessary to refer to this chart for reference purposes when reading this manual. TYPE CODE (example) S = Electric Starter Control H = Tiller Handle R = Remote Shaft Length (transom height)
  • Page 5 IDENTIFICATION NUMBERS RIGHT STE_RN BRACKET STARTER MOTOR PRODUCT IDENTIFICATION NUMBER ENGINE SERIAL NUMBER Record the Product Identification The Product Identification Number is Number (P.I.N.) and the Engine Serial stamped on a plate and attached to the Number for your reference. Refer to right stern bracket.

  • Page 6: Table Of Contents

    CONTENTS 1. SAFETY CONTROLS & INSTRUMENTS (common) SAFETY LABELS ........... 6 Tilt Lever..............SAFETY INFORMATION ........7 Trim Tab ..............2. COMPONENT IDENTIFICATION ......8 Anode Metal ............. 3. CONTROLS Water Intakes ............Transom Angle Adjusting Rod......... 22 TILLER HANDLE TYPE Fuel Cap/Gauge/Vent Knob ........
  • Page 7 CONTENTS Tool kit ..............High Altitude Operation ......... 60 Anode ..............8. STOPPING THE ENGINE 6. STARTING THE ENGINE TILLER HANDLE TYPE ........61 Fuel Tank and Vent Knob ........33 REMOTE CONTROL TYPE ......... 63 Fuel Line Connection ..........33 9.

  • Page 8: Safety

    1. SAFETY SAFETYLABELS These labels are in the locations shown. They warn you of potential hazards that could seriously injure you. Read these labels carefully. FLAMMABLE DANGEROUS GASOL mu WA1 FOR Fllllffi INFLAMMABLE DANGEREUX GAZOL PDUllR LlJ MlENJ FwRWlRt LT FwmIWa...

  • Page 9: Safety Information

    SAFETY INFORMATION Before operating the outboard Refuel carefully to avoid spilling For your safety and the safety of oth- motor, familiarize yourself with all fuel. Avoid overfilling the fuel tank ers, pay special attention to these pre- laws and regulations relating to (there should be no fuel in the filler cautions.
  • Page 10 2. COMPONENT IDENTIFICATION (TILLER HANDLE TYPE) STARTER GRIP OIL LEVEL DIPSTICK OIL PRESSURE INDICATOR LIGHT FUEL LINE THROTTLE GRIP CONNECTOR (Recoil starter O!L FILLER type) ------,\IP ENti11*IL ENGINE COVER . Pm, GEARSHIFT LEVER ENGINE DRAINSCREW j&+j SYSTEM INDICATOR JlCKl FRICTION -KNOB BRAC VENTILATION...

  • Page 11: Component Identification

    2. COMPONENT IDENTIFICATION (REMOTE CONTROL TYPE) NEUTRAL OIL PRESSURE SPARE EMERGE STOP SWITCH CHOKE/FAST IDLE LEVER INDICATOR GEAR OIL LEVEL PLUG NODE METAL) R INTAKE EMERGE HAUST PORT PROPELLER EMERGENCY STOP SWITCH CLIP...
  • Page 12 2. COMPONENT IDENTIFICATION VENT KNOB FUEL GAUGE FUEL TANK FUEL HOSE CONNECTOR (FEMALE) PRIMER BULB...

  • Page 13: Controls Tiller Handle Type

    3. CONTROLS (TILLER HANDLE TYPE) Choke Knob Engine Start Button (Electric Starter Gearshift Lever Type) (reverse) (reverse) CHbKE KNOB BUTTON When the engine is cold, pull the There are three gearshift lever posi- Move the gearshift lever to the N choke knob.

  • Page 14: Throttle Grip

    3. CONTROLS (TILLER HANDLE TYPE) Throttle Grip Throttle Friction Knob Throttle Opening Indicator THROTTLE OPENING INDICATOR THROTI’LE GRIP RELEASE The curve on the grip indicates throttle Turn the grip clockwise or counter- Use the throttle friction knob to set the clockwise to adjust the engine speed.

  • Page 15: Engine Stop Switch

    3. CONTROLS (TILLER HANDL% TYPE) Engine Stop Switch Emergency Stop Switch Lanyard ENGINE STOP SPARE EMERGENCY SWITCH STOP SWITCH CLIP PUSH EMERGENCY STOP SWITCH CLIP EMERGENCY STOP SWITCH LANYARD Push the engine stop switch to stop the The emergency stop switch lanyard is Attach the emergency stop switch lan- engine.

  • Page 16: Oil Pressure Indicator Light

    3. CONTROLS (TILLER HANDLE TYPE) Pressure Indicator Light Recoil Starter ’ STARTER GRIP OIL PRESSURE INDICATOR LIGHT ’ (Recoil starter type) The green oil pressure indicator light is Pull the starter grip to start the engine. normally ON when the outboard motor Set the gearshift lever in the N (neutral) is running.

  • Page 17: Remote Control Lever

    3. CONTROLS (REMOTE CONTROL TYPE) Remote Control Lever (NE”kAL) OPENING THROTTLE RELEASE The remote control lever controls gear REMOTE CdNTROL LEVER selection and throttle opening posi- F (forward): (reverse): tions. Moving the lever to the F position Moving the lever to the R position It is necessary to pull up the neutral (approximately 30”...

  • Page 18: Neutral Release Lever

    3. CONTROLS (REMOTE CONTROL TYPE) Neutral Release Lever Ignition Switch + ON START To run the engine after starting (the battery will discharge if the key is left in this position with the engine not running). To stop the engine (IGNITION OFF).

  • Page 19: Emergency Stop Switch Lanyard

    3. CONTROLS (REMOTE CONTROL TYPE) Emergency Stop Switch Lanyard EMERGENCY EMERGENCY STOP SPA’RE EMERGENCY SWITCH CLIP STOP SWITCH CLIP The emergency stop switch lanyard is The emergency engine stop switch A spare emergency stop switch clip is provided to stop the engine immedi- should not be used to normally stop provided on the remote control box.

  • Page 20: Choke/Fast Idle Lever

    3. CONTROLS (REMOTE CONTROL TYPE) Manual Choke Knob Choke/Fast Idle I (neutral) Lever CHOKE AXIMUM FAST IDLE LOWEST POSITION AST IDLE LEVER CHOkE KNOB A manual choke knob is provided on Lift and hold the choke/fast idle lever The choke/fast idle lever provides two up fully, this will provide a rich fuel the right side of the motor which can functions:...

  • Page 21: Oil Pressure Indicator Light/Buzzer

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

  • Page 22: Controls & Instruments

    3. CONTROLS & INSTRUMENTS (common) Tilt Lever Trim Tab Distribute4he load evenly in the boat and run the boat in straight course at full throttle. Slightly turn the steering wheel or tiller handle for both right and left turns to determine if an equal amount of effort is required.

  • Page 23: Anode Metal

    3. CONTROLS & INSTRUMENTS (common) Anode Metal Water Intakes Cooling System Indicator Waier Intakes COOLING SYSTEM INDICATOR The anode is made from a sacrificial The cooling system is monitored here The engine cooling water is drawn material which helps to protect the to make sure cooling water is circulat- into the water pump through these outboard motor from corrosion.

  • Page 24: Transom Angle Adjusting Rod

    3. CONTROLS & INSTRUMENTS (common) Transom Angle Adjusting TRANSOM ANGLE ADJjJSTING TO CHANGE UNLOCKED POSITION TO LOCK LOCKED POSITION TRANSOM ANGLE ADJUSTING The transom angle adjusting rod is som, lower the motor and operate the used to adjust the motor angle to boat at full speed.

  • Page 25: Fuel Cap/Gauge/Vent Knob

    3. CONTROLS & INSTRUMENTS (common) Fuel Cap/Gauge/Vent Knob Before transporting or storing the fuel Over-Rev Limiter tank turn the vent knob fully clock- This outboard motor is equipped with VENT KNOB wise to the closed position. an engine over-rev limiter which limits the maximum engine rpm.

  • Page 26: Installation

    4. INSTALLATION Installation It is your responsibility to choose a boat suitable for the motor. DO NOT OVERPOWER THE BOAT Do not install an outboard motor that exceeds the recommended maximum STERN CENTER LINE horsepower for the boat. Refer to the Installation position boat certification...

  • Page 27: Motor Attachment

    This modification should be made by your will prevent accidental loss of the authorized Honda Marine or Honda motor. Outboard Motor dealer. For battery handling and installation information refer to pages 76, 77.

  • Page 28: Engine Cover Removal Installation

    4. INSTALLATION Engine Cover Removal/Installation CINE COVER To remove, release the engine cover latch and remove the engine cover. To install, position the engine cover over the engine and hook and lock the latch.

  • Page 29: Pre-Operation Checks

    5. PRE-OPERATION CHECKS Engine Oil NOTE: This oil is usually identified by Engine oil is a major factor affecting words such as: “Energy Conserving II.” engine performance and service life. “Gas Saving, ” “Fuel Saving, ” etc. Running the engine with insufficient oil can cause serious engine damage.

  • Page 30: Fuel Level

    5. PRE-OPERATION CHECKS Fuel Level VENT KNOB SAFE FILL LEVEL Check the fuel gauge and refill the Refilling Gasoline tank to the. SAFE FILL level mark if Remove the fuel tank from the boat extremely flammable, ‘and gaso- necessary. for refilling. Turn the vent knob coun- line vapor can explode, causing terclockwise to the open position and...

  • Page 31: Fuel Recommendations

    If spark knock or pinging occurs at a steady engine speed, under normal load, change brands of gasoline. If spark knock or pinging persists, see an authorized Honda Marine or Honda Outboard Motor dealer. Running the engine with persistent spark knock or pinging can cause engine damage.

  • Page 32: Oxygenated Fuels

    5. PRE-OPERATION CHECKS Oxygenated Fuels METHANOL -(methyl or wood alcohol) 5% by volume Some conventional gasolines are being blended with alco- You may use gasoline containing up to hol or an ether compound. These gasolines are collec- 5% methanol by volume, as long as it tively referred to as oxygenated fuels.

  • Page 33: Propeller And Cotter Pin

    Carrying a spare propeller, propeller freely. nuts, and cotter pins are common prac- tice. If the propeller is damaged and no spare propeller is available consult an authorized Honda Marine or Honda Outboard Motor dealer. (Refer to page 84 for propeller change information)

  • Page 34: Remote Control Friction Adjustment

    5. PRE-OPERATION CHECKS Remote Control Friction Adjustment Other Checks . Tool Kit .- _ .e.-- PHILLIPS m 1. SCREWDRIVER SCRRWDRIVER HANDLE TOOL BAG OIL CHECK LE2rzzl SCREWDRIVER I* I I9 Dim WRRNCH FRICTION Check the following items: Replace the anode when it has been Operate the remote control lever into 1.

  • Page 35: Starting The Engine

    6. STARTING THE ENGINE Fuel Tank and Vent Knob Fuel Line Connection FUEL HOSE VENT KNOB CONNECTOR (FUEL TANK END)\ 1. Open the fuel tank vent by tum- Inspect the fuel hose, and the O-ring The fuel tank must be properly se- ing the vent knob at least 2 or 3 seals in the fuel hose connectors.
  • Page 36 6. STARTING THE. ENGINE FUEL HOSE CONNECTOR PRIMER BULB (OUTBOARD END) 2. Connect the fuel hose connector to 3. Hold the primer bulb so that the [ NOTICE 1 If the outboard end the outboard motor. Install the outlet end is higher than the inlet fuel hose connector is forcibly in- outboard end fuel hose connector end.

  • Page 37: Starting The Engine (Tiller Handle Type)

    6. STARTING THE ENGINE (TILLER HANDLE TYPE) ENGINE STOP SWITCH GEAR SHIFT LEVER EMERGENCY STOP SWiTCH LANYARD j-iimq A spare emergency stop switch clip is Move the gearshift lever to the N The propeller must be (neutral) position. provided near the engine stop switch. lowered into the water.
  • Page 38 6. STARTING THE ENGINE (TILLER HANDLE TYPE) STARTER GRIP CHOKE KNOB THROTTiE GRIP 3. Align the engine start symbol 5. Pull the starter rope slowly until a 4. When the engine is cold or ambient ” QI ” on the throttle grip with the temperature is low pull the choke resistance is felt, then pull briskly.
  • Page 39 6. STARTING THE ENGINE (TILLER HANDLE TYPE) Electric Starter (Electric starter Type) START BUTTON CHOKE IkNOB 7. If it was necessary to use the choke knob to start the 6. Press the start button and start the engine, slowly return it to its initial position. Turn the engine.
  • Page 40 ON, contact your closest authorized Honda Marine indicator or if you see steam. Check the water intake or Honda Outboard Motor dealer.

  • Page 41: Starting The Engine (Remote Control Type)

    6. STARTING THE ENGINE (REMOTE CONTROL TYPE) EMERGENCY (neutral) SPARE EMERGENCY STOP SWITCH CLIP spare emergency stop switch clip is (NOTICE1 The propeller must be If the operator does provided on the remote control box. lowered into the water. Running the not attach the emergency stop...
  • Page 42 6. STARTING THE ENGINE (REMOTE CONTROL TYPE) f--' CHOKE CHOI~~A~-~~DLEL~ER engine is running. This can damage 4. Hold the choke/fast idle lever in When the engine is cold or the the starter motor and flywheel. ambient temperature is low, lift the position, turn the ignition key to the choke/fast idle lever up fully.
  • Page 43 Check the water intake turn ON, contact your closest authorized Honda Marine or screens and the cooling system indicator discharge port Honda Outboard Motor dealer.

  • Page 44: Emergency Starting

    6. STARTING THE ENGINE Emergency Starting 6 x 22 BOLTS NEUTRAL START 6x22mm CARLE FLANGE BOLT (4) NGINE COVER WASHERS FLYWHEEL COVER LATCHES If the recoil starter and electric starting (Electric starter type) (Recoil starter type) system will not start the engine the 2.
  • Page 45 6. STARTING THE ENGINE (neutral) ENGINE STOP SWITCH EMERGENCY GEARSHIFT LEVER STOP SWITCH STOP SWITCH LANYARD (TILLER HANDLE TYPE) (REMOTE CONTROL TYPE) \yIL 5. Depending on what type of outboard 6. If your outboard motor is a tiller handle type, engage the emergency motor you have, move the gearshift stop switch clip, located at one end lever or the control lever to the N...
  • Page 46 6. STARTING THE ENGINE IGNITION EMERGENCY STOP SWITCH ~PAREEME~~ENCY CHOKE\KNOB CLIP STOP SWITCH CLIP (TILLERHANDLETYPE) 7. If your outboard motor is a remote A spare emergency stop switch clip is 8. If the engine is cold or the ambient control type, turn the ignition key to provided on the remote control box.
  • Page 47 6. STARTING THE ENGINE ENGINE START-SYMBOL POIN%ER THROTTLE GRIP CHOKiE KNOB (REMOTE CONTROL TYPE) (TILLER HANDLE TYPE) (REMOTE CONTROL TYPE) 9. On the tiller handle type align the If the fuel system is working properly, it engine start symbol ” QI ” on the should only be necessary to pull the throttle grip with the pointer ”...
  • Page 48 Attach the emergency stop switch lanyard securely to the operator and return to the closest boat landing. Contact your closest authorized Honda Marine or Honda Outboard Motor dealer and have the outboard motor and the electrical system checked.

  • Page 49: Troubleshooting Starting Problems

    6. STARTING THE ENGINE Troubleshooting Starting Problems SYMPTOM POSSIBLE CAUSE REMEDY Starter motor 1. Shift lever not in neutral 1. Set shift lever in neutral doesn’t turn position. position. over. 2. Blown fuse. 2. Replace fuse. (refer to page 83) 3.

  • Page 50: Operation

    7. OPERATION Break-in Procedure Break-in period 10 hours bursts of full throttle are acceptable but do not operate the motor contin- Break-in operation allows the moving uously at full throttle. parts to wear-in evenly and thus ensures proper performance and Next 8 hours: longer outboard motor life.

  • Page 51: Gear Shifting

    7. OPERATION (TILLER HANDLE TYPE) Gear Shifting THRO’ITLE GRIP F (forward), 2. Put the tilt lever in the RUN position The throttle mechanism is designed to Gearshift lever has 3 positions: to prevent the outboard motor from hmit the throttle grip travel when FORWARD, NEUTRAL, and tilting up, when operating in reverse.

  • Page 52: Steering

    7. OPERATION (TILLER HANDLE TYPE) F (fnrward) Steering Cruisinfx RIGHT TURN LEFT TURN Move the tiller Move the tiller handle to the left. handle to the right. RELEASE THROT;LE GRIP To set the throttle at a steady speed, With the gearshift lever in the F (for- The tiller handle is moved in the oppo- turn the throttle friction knob clock- ward) position, turn the throttle grip...

  • Page 53: Gear Shifting

    7. OPERATION (REMOTE CONTROL TYPE) Gear Shifting (neutral) (neutral) gorward) 30” I (reverse) 30” MAXIMUM PULL UP While pulling up the neutral release Moving the control lever further from The control lever will not move unless lever, move the control lever 30” 30”...

  • Page 54: Cruising

    7. OPERATION Cruising (neutral) (forward) MAXIMUM OPENING 1. 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. 2.

  • Page 55: Tilt Lever

    7. OPERATION Tilt Lever (neutral) \ PUSH SHIFT LEVER SWITCH (REMOTE CONTROL TYPE) (TILLER HANDLE TYPE) 1. Stop the boat. Tilt the motor up to prevent the propel- ler and gear case from hitting the 2. Move the gearshift lever or control bottom when beaching or stopping in lever to the N (neutral) position and shallow water.
  • Page 56 7. OPERATION ENGINECOVERGRIP 75” (when mooring) 30’ (when cruising in shallow water) TILT~EVER 3. Put the tilt lever in the TILT posi- 4. To return the motor to the normal Reverse Operation: tion. Use the engine cover grip and RUN position, move the tilt lever The tilt lever must be in the RUN raise the motor to either the 30”, 45”...
  • Page 57 7. OPERATION Motor angle During operation, be sure: The anti-ventilation plate remains under water at all times. Water flows from the cooling system indicator. INCORRECT INCORRECT ‘@z The load is evenly distributed. CAUSES BOAT TO CAUSES BOAT TO‘ “SQUAT” “PLOW” Excessive or imbalanced loading will affect the motor’s water depth.

  • Page 58: Trim Tab Adjustment

    7. OPERATION Trim Tab Adjustment TIGHTENING BOLT Make small adjustments at a time and The trim tab is provided to adjust for If less effort is required to make left tums: retest. Incorrect trim tab adjustment “torque steer” which is a reaction of Loosen the trim tab tightening bolt can cause adverse steering.

  • Page 59: Engine Oil Pressure And

    7. OPERATION (MOTOR PROTECTION SYSTEM) Engine Oil Pressure and Overheat Warning System OIL PRESSURE <Tiller Handle type> If the engine oil pressure drops, the warning system could be activated and the green oil pressure indicator light will turn OFF. If the engine overheats, the warning system could be activated and the 14 w”...
  • Page 60 27). return to the closest boat landing and contact your closest authorized 2.If the oil is up to the recommended Honda Marine or Honda Outboard level, restart the engine. If the oil Motor dealers. pressure warning system stops after 30 seconds, the system is normal.

  • Page 61: Over-Rev Limiter

    7. OPERATION (MOTOR PROTECTION SYSTEM) Anode Over-Rev Limiter This outboard motor is equipped with an engine over-rev limiter which activates when the engine speed increases excessively. The over-rev limiter can be activated while cruising, or when ventilation occurs during a sharp turn.

  • Page 62: High Altitude Operation

    Honda Marine or Outboard Motor your outboard at altitudes above 6,000 feet (1,800 meters) dealer return the carburetors to original factory speci- have an authorized Honda Marine or Outboard Motor fications. dealer perform this carburetor modification. Even with carburetor modification, engine horsepower will decrease about 3.5% for each 1,000 foot (300 meter)

  • Page 63: Stopping The Engine Tiller Handle Type

    8. STOPPING THE ENGINE (TILLER HANDLE TYPE) Normal Engine Stop Emergency Engine Stop ENGINE STOP SWITCH GEARSHJFT FEVER ERGENCY STOP SLOW THROTTLE GRIP 1. Turn the throttle grip to SLOW Disengage the emergency stop switch position and move the gearshift lev- clip from the engine stop switch by er to N(neutral).
  • Page 64 8. STOPPING THE ENGINE (TILLER HANDLE TYPE) PUSH ENGIN’E STOP SWITCH 2. Push the engine stop switch until the engine stops.

  • Page 65: Remote Control Type

    8. STOPPING THE ENGINE (REMOTE CONTROL TYPE) Emergency Engine Stop Normal Engine Stop (neutral) EMERGENCY STOP SWITCH ERGENCY STOP ITCH LANYARD CONTR LEVER IGNITION EMEiGENCY STOP SWITCH CLIP 1. Move the control lever to the N 2. When the boat is not in use, remove Disengage the emergency stop switch (neutral) position and turn the igni- and store the ignition key.

  • Page 66: Transporting

    9. TRANSPORTING Horizontal Transport Ttailering If there is insufficient road clearance STEERING FRICTION with the motor in the normal run po- sition, then trailer the motor in the tilted position using a motor support bar (refer to your motor support bar manufacturer’s instructions) or re- move the motor from the boat.

  • Page 67: Cleaning And Flushing

    10. CLEANING AND FLUSHING 5. Move the gear-shift lever or control lever to the N (neutral) position. Blush the outboard motor in the neutral position only. 6. Turn on the fresh water supply to the flush kit coupler. Running the outboard motor without sufficient cooling FLUSH K’IT COUPLER WASH PLUG (flush plug)
  • Page 68 10. CLEANING AND FLUSHING 8. Allow the engine to run at idle for at least 5 minutes to clean the inside of the motor. 9. Stop the motor and remove the flush kit coupler. lO.Remove the sealing washer from the flush kit coupler and install the sealing washer on the wash plug.

  • Page 69: 1. Maintenance

    11. MAINTENANCE To maintain the cooling system effi- Periodic maintenance and adjustment ciency, flush the outboard motor with are important to keep the motor in the best operating condition. Service and fresh water after operating in salt water inspect according to the MAINTENA- or dirty water.

  • Page 70: Tool Kit And Spare Parts

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

  • Page 71: Maintenance Schedule

    11. MAINTENANCE 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) EVERY EVERY Performed at evety indicated FIRST EVERY...
  • Page 72 Honda Marine or Honda Outboard Motor dealer, unless the owner has the proper tools and is mechani- callly proficient. See the Honda Shop Manual. For professional commercial use, log hours of operation to determine proper maintenance intervals.

  • Page 73: Engine Oil

    11. MAINTENANCE OIL CAPACITY: Engine Oil OIL FILLER 1.7 US qt (1.6 lit) . ..When oil filter is Engine oil is a major factor affecting not replaced engine performance and service life. qt (1.9 lit) . ..When oil filter is 2.0 US replaced Oil check interval:...
  • Page 74 11. MAINTENANCE 5. Reinstall the oil filler cap. Always wash your hands after handling used oil. Also, please dispose of used motor oil in a manner that is compatible with the environment. We suggest you take it in a sealed container to your local service station reclamation...

  • Page 75: Gear Oil

    If the oil appears abnormal contact you closest authorized Honda Marine or Honda Outboard Motor dealer.

  • Page 76: Spark Plugs

    11. MAINTENANCE Gear Oil Change Spark Plugs 1. Position the outboard motor verti- To ensure proper engine operation, the cally. spark plugs must be properly gapped and free of deposits. 2. Remove the level plug and drain plug to drain the oil. Inject oil Check-replace interval: through the drain plug hole until it...
  • Page 77 11. MAINTENANCE The spark plugs must be 0.024-0.028 securely tightened. A loose spark (0.6-0.7 plug can become very hot and may cause engine damage. Overtightening the spark plugs can damage the threads. 7. Thread the plugs in by hand to pre- 6.

  • Page 78: Battery (Not Included)

    11. MAINTENANCE Battery (not included) NEGATIVE Minimum requirements CARRYlNG 12V-7OAI-I marine cranking battery. Maintenance interval Refer to the maintenance schedule page 70 and your battery manufac- turer’s instructions for servicing or recharging information. Check the battery cables to be sure TERMINAL they are securely connected to the bat- POSITIVE...
  • Page 79 11. MAINTENANCE Battery cleaning Installation: DC Receptacle (Equipped type only) To protect the battery from mechani- Batteries produce cal damage and to prevent the bat- DCRECEP’iACLE explosive hydrogen gas. A spark tery from falling or tipping over, the or flame can explode the battery TO ACCESS0 causing...

  • Page 80: Lubrication

    11. MAINTENANCE receptacle provides a volt, The DC Lubrication 6 amp output for battery charging. The Lubrication interval: After the first 20 hours, then every 100 hours. charging circuit is protected by a 15 (Refer to the maintenance schedule page 69.) amp fuse that is mounted inside the Apply marine anticorrosion grease to the following parts:...
  • Page 81 11. MAINTENANCE ADJUSTING PROPqLLER SHAFT...

  • Page 82: Engine Fuel Filter

    11. MAINTENANCE Engine Fuel Filter CONNECTER Gasoline FUEL HOSE extremely flammable, and gaso- line vapor can explode, causing Do not serious injury or death. smoke or allow flames or sparks in your working area. KEEP OUT OF REACH OF CHILDREN. Always work in a well-ventilated area.
  • Page 83 11. MAINTENANCE FUEL HOSES FUEL H63E CLIPS ARROW (Fuh Flow Direction) FUEL.FILTER 3. Lift the fuel filter up from the engine Change 2. Install the new fuel filter so the under case. arrow on the fuel filter points 1. Remove the fuel filter. toward the fuel pump.

  • Page 84: Fuel Tank And Filter

    11. MAINTENANCE Fuel Tank and Filter Fuel Tank Cleaning 4. Securely connect the fuel hose connector to the outboard motor 1. Disconnect the fuel hose from the 33). (refer to page fuel tank. 5. Prime the engine using the primer bulb page 34.

  • Page 85: Fuse Replacement

    11. MAINTENANCE Fuse Replacement (Electric starter type) FUEL TANK HOSE FUSE COVER CONNECTOR _ FUEL TANK FILTER BLOWN FUSE Replacemeht If the fuse is blown, running the engine Fuel Tank Filter 1. Stop the engine. Cleaning/Replacement will not charge the battery and the 2.

  • Page 86: Propeller

    14 mm castle nut, 15 mm plain washer, necessary, tighten the castle nut just propeller and thrust washer. enough to align the hole with the groove in the nut. Use a new genuine Honda cotter pin and bend the cotter pin ends shown.

  • Page 87: Submerged Motor

    Immediately take the outboard motor to the closest authorized Honda Marine or Honda Outboard Motor dealer or if you are far from a dealership, proceed as follows: DRAIN SCREW 1.
  • Page 88 11. MAINTENANCE 8. Take the outboard motor to your Running the outboard closest authorized Honda Marine or motor without suffkient cookg Honda Outboard Motor dealer for water will damage the water pump inspection and service as soon as and overheat the engine.

  • Page 89: Storage

    12. STORAGE For longer service life of the outboard motor, have your outboard motor serviced by an authorized Honda #l CARBURETOR Marine or Honda Outboard Motor DRAIN SCREW dealer before storage. If you are unable to take the motor to...
  • Page 90 12. STORAGE Outboard Motor Position CASE PROTECTORS Horizontal transport or storage: Transport and store the motor either Rest the motor on the case protectors. vertically or horizontally, as shown above. Store the outboard motor in a well-ventilated area free from direct [NOTICEI Improper transport or sunlight and humidity.

  • Page 91: Troubleshooting

    13. TROUBLESHOOTING (1) Engine does not start. Fuel Contamination - Spark plug No sparks - There is no gasoline Fuel is not fed - is faulty. Incorrect gap across spark in fuel tank. to carburetor. Broken spark plug Vent knob is not open or Plug gap vent clogged.
  • Page 92 13. TROUBLESHOOTING (2) Engine starts but immediately stops. Engine some times stops while cruising. Engine overheats Fuel Water intake screens Normal sparking No gasoline in fuel tank. are clogged. Water is mixed with There is gasoline - Spark plug is not of speci- gasoline.

  • Page 93: Specifications

    14. SPECIFICATIONS Ignition system C.D.1 Lubrication system Trochoid pump pressure lubrication Specified oil Engine: API standard (SC, SH) SAE IO W-30 Gear case: API standard (GL-4/5) SAE 90 outboard motor gear oil...
  • Page 94 14. SPECIFICATIONS Specifications are subject to change without notice.
  • Page 95 14. SPECIFICATIONS Recoil starter Electric starter Starter system Ignition system C.D.I. Lubrication system Trochoid pump pressure lubrication Engine: API standard Specified oil (Fuel Efficient SC, SH) SAE 5W-30 Gear case: API standard (CL-4/5) SAE 90 outboard motor gear oil...
  • Page 96 14. SPECIFICATIONS Specifications are subject to change without notice.

  • Page 97: Warranty Service

    If the prob- - Nature of the problem lem has already been reviewed with the Service Manager, contact the Your purchase of a Honda product is owner of the dealership or the greatly appreciated by both your dealer General Manager.
  • Page 98 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 99: Wiring Diagram

    16. WIRING DIAGRAM TILLER HANDLE TYPE (with recoil starter)
  • Page 100 16. WIRING DIAGRAM TILLER HANDLE TYPE (with electric starter) -- ------_ BF25A outboard : - -iFjOA outboard C---------------J...
  • Page 101 16. WIRING DIAGRAM REMOTE CONTROL TYPE BF25A outboard...

  • Page 102: Index

    17. INDEX Anode Metal ..............21 Pressure and Overheat Warning System ....
  • Page 103 17. INDEX STOPPING THE ENGINE Oil Pressure Indicator Light..........REMOTE CONTROL TYPE ........63 Oil Pressure Indicator Light/Buzzer ........19 TILLER HANDLE TYPE ........... 6 I Other Checks ..............STORAGE ................. Over-Rev Limiter............... Submerged Motor .............. Overheat Indicator Light/Buzzer ........Oxygenated Fuels ..............

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Marine bf30a

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