TOHATSU MFS 6BZ Owner's Manual
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TOHATSU MFS 6BZ Owner's Manual

TOHATSU MFS 6BZ Owner's Manual

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O W N E R' S
M A N U A L
トーハツ船外機 オーナーズマニュアル
Original instructions
MFS 6BZ
MFS 8B
MFS 9.8B
OB No.003-11113-ABB1
EN

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  • Page 1 O W N E R’ S M A N U A L トーハツ船外機 オーナーズマニュアル Original instructions MFS 6BZ MFS 8B MFS 9.8B OB No.003-11113-ABB1...
  • Page 2 MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2022 Tohatsu Corporation. All rights reserved. No part of this manual may be reproduced or transmitted in any from or by any means without the express written permission of Tohatsu Corporation.
  • Page 3 In case you encounter any problems, please contact an authorized TOHATSU service shop or dealer for assistance. Tohatsu Corporation reserves the right to change, modify, add, or remove a part or whole of the owner’s manual without prior notice and incurring any obligations.
  • Page 4 ENOM00003-1 PRE-DELIVERY INSPECTION Make sure Pre-delivery inspection has been properly done by authorized TOHATSU dealer before operating your outboard motor. ENOM00005-1 Serial Number Your outboard motor has a unique serial number. The serial number is identification of outboard motor and is located on the outboard motor as shown in the figures below.
  • Page 5 ENOM00007-0 NOTICE: DANGER/WARNING/CAUTION/Note Before installing, operating or otherwise handling your outboard motor, be sure to thor- oughly read and understand this Owner's Manual and carefully follow all of the instruc- tions. Of particular importance is information preceded by the words “DANGER,” “WARNING,”...

  • Page 7: Table Of Contents

    CONTENTS 1. GENERAL SAFETY INFORMATION ........10 2.
  • Page 8 12. ACCESSORIES KIT ..........83 13.
  • Page 9 INDEX 1. GENERAL SAFETY INFORMATION 2. SPECIFICATIONS 3. PARTS NAME 4. LABEL LOCATIONS 5. INSTALLATION 6. PRE-OPERATING PREPARATIONS 7. ENGINE OPERATION 8. REMOVING AND CARRYING THE OUTBOARD MOTOR 9. ADJUSTMENT 10. INSPECTION AND MAINTENANCE 11. TROUBLESHOOTING 12. ACCESSORIES KIT 13. PROPELLER TABLE...

  • Page 10: General Safety Information

    GENERAL SAFETY INFORMATION ENOM00009-1 SAFE OPERATION OF BOAT As the operator/driver of a boat, you are responsible for the safety of those aboard and those in other boat around yours, and for following local boating regulations. You should be thoroughly knowledgeable on how to correctly operate the boat, outboard motor, and accessories.
  • Page 11 Be sure to use genuine parts, genuine lubricants, or recom- mended lubricants. Be aware that the installation and use of parts not approved by Tohatsu Corporation will void warranty and may lead to unsafe operating conditions. ENOM00011-1...

  • Page 12: Specifications

    SPECIFICATIONS ENOM00810-A MODEL FEATURE Model F9.8B Type Transom heights Tiller Handle Remote Control Power Tilt Manual tilt *1: Option ENOM00811-A MODEL NAME EXAMPLE F 9.8B EPTL Model Horse Product Starter Steering Shaft Tilt system description power generation system system length T= Power P=Remote control S= Short 15 in...
  • Page 13 (ICOMIA 39/94) dB (A) Hand Vibration Level — (ICOMIA 38/94) m/s Remark: Specifications are subject to change without notice. *1 With propeller, with battery cable. *2 With Manual Start Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).
  • Page 14 (ICOMIA 39/94) dB (A) Hand Vibration Level — (ICOMIA 38/94) m/s Remark: Specifications are subject to change without notice. *1 With propeller, with battery cable. *2 With Manual Start Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).
  • Page 15 (ICOMIA 39/94) dB (A) Hand Vibration Level — (ICOMIA 38/94) m/s Remark: Specifications are subject to change without notice. *1 With propeller, with battery cable. *2 With Manual Start Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).

  • Page 16: Parts Name

    PARTS NAME ENOM00820-0 MF, EF, EP ENOF01402-1 Tilt Handle Splash Plate Stop Switch *1 Top Cowl Thrust Rod Stop Switch Lanyard Bottom Cowl Clamp Bracket Choke Knob Cooling Water Check Port Clamp Screw Fuel Connector Oil Drain Plug Tiller Handle *1 Starter Switch *2 Water Plug Throttle Grip *1...
  • Page 17 PARTS NAME ENOM00020-0 EFT, EPT ENOF01403-1 Tilt Handle Splash Plate Stop Switch *1 Top Cowl Trim Lock Pin Stop Switch Lanyard Bottom Cowl Clamp Bracket Choke Knob Cooling Water Check Port Clamp Screw Fuel Connector Oil Drain Plug Tiller Handle *1 Starter Switch Water Plug Throttle Grip *1...
  • Page 18 PARTS NAME ENOM00822-0 Remote control box & Fuel tank ENOF01404-2 Control Lever Air vent screw Neutral lock arm Fuel tank cap PTT switch Fuel connector (Engine side) Free throttle lever Primer bulb Main switch Fuel connector (Fuel tank Stop switch side) Stop switch lock Stop switch lanyard...

  • Page 19: Label Locations

    LABEL LOCATIONS ENOM00019-A Warning label locations 2, 3 ENOF01405-3...
  • Page 20 LABEL LOCATIONS Read owner's manual. 5-4. ELECTRICAL SHOCK HAZARD High voltage can cause severe elec- trical shock. Do not touch electrical components such as ignition coil or spark plug ENOF00120-0 cord when star ting or while the Oil pressure lamp (See page 31). engine is in operation.
  • Page 21 LABEL LOCATIONS ENOM00019-B CE label locations MF/EF model 1521 CAN ICES-2 / NMB-2 ENOF01406 6 EP/EFT/EPT model 1521 CAN ICES-2 / NMB-2 ENOF01406-7 1. Model code (Model name) 5. Manufacturer name 6. Manufacturer address 2. Serial No. 7. Authorised representative 3.

  • Page 22: Installation

    INSTALLATION Keep the outboard motor in a vertical ENOM00024-B 1. Mounting the outboard position when mounting. motor on boat ENOW00006-1 WARNING Most boats are rated and certified for their maximum allowable horsepower, as shown on the boat’s certification plate. Do not equip your boat with an outboard motor that exceeds this limit.
  • Page 23 INSTALLATION 4. Secure the outboard motor to the boat with a rope to prevent acciden- tal loss of the outboard motor over- board. ENON00930-0 5−25 mm Note (0.2−1 in) Do not use tools to tighten clamp screws. Over tightening could result in damage to ENOF01408-1 the clamp screws and clamp brackets.

  • Page 24: Battery Installation

    INSTALLATION ENON00003-2 Notes Apply sealing material, such as silicone sealed between the bolts and the tran- som board holes before tightening the bolts. 2. For EP / EFT type, drill the holes in transom board only at left and right of lower side of clamp bracket, and attach outboard motor with supplied bolts.
  • Page 25 INSTALLATION ENOW00013-A ENON00006-1C Note WARNING Minimum batter y re quirements: 12v Battery generates explosive hydrogen gas. 40Ah/20HR, 330 Cold Cranking Amps Be sure to: (CCA). Larger capacity battery is required when it Charge the battery in a well-ventilated is used under a freezing condition. place.

  • Page 26: Pre-Operating Preparations

    When operating an outboard motor with The fuel system components on your gasoline containing ethanol, storing gasoline TOHATSU outboard motor will withstand in the fuel tank for long periods should be up to 10% ethyl alcohol (hereinafter avoided. Storing gasoline for long periods referred to as the "ethanol") content in...

  • Page 27: Fuel Filling

    PRE-OPERATING PREPARATIONS The static electricity may ignite the gaso- ENOW00018-1 line vapor during refueling. WARNING Stop the engine, and do not start the engine during refueling. Fuel leakage can cause fire or explosion, Do not smoke. potentially leading to severe injury or loss of Be careful not to overfill fuel tank.

  • Page 28: Engine Oil Filling

    PRE-OPERATING PREPARATIONS 1. Fully open the air vent screw on the ENOW00092-1 fuel tank cap and release internal CAUTION pressure. Do not overfill engine oil, or engine oil could leak and/or engine could be dam- aged. If engine oil level is over upper limit marks of oil level gauge, drain oil to level lower than upper limit.
  • Page 29 PRE-OPERATING PREPARATIONS ENOW0002A-A CAUTION Use of engine oils that do not meet these requirements will result in reduced engine life, and other engine problems. ENOF00081-0 1. Upper limit (Max.) 2. Lower limit (Min.) Engine oil recommendation Use only high quality 4-stroke outboard motor oil to insure performance and pro- longed engine life.

  • Page 30: Break-In

    PRE-OPERATING PREPARATIONS ENOM00033-A 4. Break-In Your new outboard motor and lower unit ENOW00023-1 require break-in for the moving compo- CAUTION nents a ccording to the conditions Operating the outboard motor without described in the following time table. break-in can shorten life. Please refer to ENGINE OPERATION sec- If any abnormality is experienced during the tion (See page 33) to learn how to cor-...

  • Page 31: Warning System

    PRE-OPERATING PREPARATIONS ENOM00039-C 5. Warning system If outboard motor encounters an abnor- mal condition of fault, the warning buzzer will emit a continuous beep or intermit- tent short beeps and the warning lamp (LED) will synchronize with the buzzer and engine speed will be limited (engine will ENOF00851-A not be stopped).
  • Page 32 PRE-OPERATING PREPARATIONS ENOM00041-C Warning indicators, faults and remedy Warning indicators Description of faults Remedy Sound Lamp (LED) (EPT only) On for several Normal system test when start up sec. Engine speed exceeds maximum High speed ESG allowable RPM Continuous Low speed ESG Low oil pressure Remarks *1: In this case, oil pressure switch is “ON”.

  • Page 33: Engine Operation

    ENGINE OPERATION disconne c t stop switch lock and crank ENOM00042-0 approximately 10 times in order to prime the Before starting oil pump. ENOM00246-0 Oil Level checking ENOM00044-C Check the engine oil level before each 1. Fuel feeding use. If the oil level is low or too high, the life of the engine will be shortened sig- ENOW00029-1 nificantly.

  • Page 34: Starting The Engine

    ENGINE OPERATION 3. Connect the fuel connector to the ENOM00045-C engine and fuel tank. 2. Starting the engine ENOW00958-1 WARNING Do not remove or install the top cowl after the engine has started. The exposed rotating engine parts cause serious injury. ENOW00959-0 CAUTION ENOF00514-0...
  • Page 35 ENGINE OPERATION ENOW00036-1 CAUTION Operating outboard motor without cooling water will lead to overheating and damage on the outboard motor severely. In case the cooling water check port is not discharging water, stop the outboard motor immedi- ately, check for any object, debris which may be blocking the cooling water check port.
  • Page 36 ENGINE OPERATION 4. Pull the choke knob fully. (For electrical starter type) 5. Push the starter switch button and release the button when the engine has started. ENOF00518-0 1. Choke knob ENON00501-0 Note ENOF00520-0 Choke is not necessary when the engine is 1.
  • Page 37 ENGINE OPERATION Side mount RC type ENON00035-1 Note 1. Be sure to install the stop switch lock The free throttle lever cannot be raised to the stop switch, and attach the when the control lever is in Forward or stop switch lanyard securely to the Reverse.
  • Page 38 ENGINE OPERATION 9. Check the cooling water from cooling water check port. ENOF00521-1 2. Remove starter lock cable from recoil ENOF01411-1 starter by loosening the screw for the starter lock cable. ENOM00042-A Emergency starting ENOW00099-1 WARNING When the emergency starter rope is used for starting engine;...
  • Page 39 ENGINE OPERATION 8. Pull the starter handle slowly until you feel engagement, keep pulling till you feel less resistance. Then pull it quickly. 9. Once the outboard motor is started, do not reinstall the recoil starter and top cowl. ENOM00518-0 ENOF01435-0 If the choke solenoid fails to operate (EP and EPT type only)

  • Page 40: Warming Up The Engine

    ENGINE OPERATION ENOM00044-A Engine speeds Idling speed after warming up. Clutch in (In gear) Clutch off (Out of gear) 900 min (rpm) 950 min (rpm) ENOM00972-1 Free throttle lever (Side mount RC type) ENOW00956-A ENOF00529-0 CAUTION 1. Choke plate (closed position) The free throttle lever is inoperative ENOM00043-A unless the control lever is in neutral.

  • Page 41: Forward, Reverse, And Acceleration

    ENGINE OPERATION ENOM00046-A ENOW00861-1 4. Forward, reverse, and WARNING acceleration Do not shift at high boat speed, or control may be lost, fall down or causing passen- ENOW00037-1 ger(s) to be thrown overboard. Leading to WARNING serious personal injury. Before shifting into forward or reverse, make ENOW00867-1 sure that boat is properly moored and out- WARNING...
  • Page 42 ENGINE OPERATION ENOM00890-A Tiller handle type ENOW00865-A CAUTION Do not force to shift when the throttle grip is not in the fully closed position, otherwise, steering system and/or shifting mechanism may be damaged. ENOF01119-0 1. Throttle grip ENOM0900-0 Side mount RC type ENOW00865-A CAUTION Do not force to shift when the throttle grip is...

  • Page 43: Stopping The Engine

    ENGINE OPERATION Forward boat to be thrown forward due to inertial force. 1. Quickly push the control lever to the Forward (F) position 32°, where the Tiller handle type gear is connected, while lifting up on 1. Turn the throttle grip to the slow the lock button located under the position.
  • Page 44 ENGINE OPERATION Side mount RC type Disconnect the battery cable, after each use. 1. Put the control lever in the Neutral position and run the engine for 2-3 Emergency engine stopping minutes at idling speed for cooling Remove stop switch lock to stop the down if it has been running at full engine.

  • Page 45: Steering

    ENGINE OPERATION an operator falls into water, be sure to use spare emergency stop switch lock. ENOF00891-0 ENOM00920-0 ENOF00893-0 6. Steering ENOM00050-0 7. Trim angle ENOW00870-0 WARNING ENOW00043-1 WARNING Sudden steering may cause passenger(s) to be thrown overboard or falling down. Adjust the trim angle when the engine is Tiller handle type stopped.
  • Page 46 ENGINE OPERATION The trim angle of the outboard motor can ENOM00054-0 Improper trim angle (bow dips into the be adjusted to suit the transom angle of water) the hull, and load conditions. Choose an Set the thrust rod (or preset knob) higher appropriate trim angle that will allow the if the bow of the boat is below horizontal.
  • Page 47 ENGINE OPERATION Remark: Thrust rod is for MF and EF, and 4. Change the trim lock pin position as preset knob is for EP . following picture. Trim angle adjustment (Manual tilt MF, EF type) The transom angle adjustment 1. Stop the engine. 2.

  • Page 48: Tilt Up And Down

    ENGINE OPERATION 6. Reinstall the trim lock pin securely. ENON00921-1 Note 7. Operate the Power Tilt switch and tilt After use, leave the outboard motor down the outboard. upright for a minute to drain the water from inside the engine. ENOM00060-A 8.
  • Page 49 ENGINE OPERATION ENOM00063-A Tilt down Slightly tilt the motor up, and pull the tilt lever toward you to release the tilt-lock. Then lower the motor slowly. JNOF01403-1 1. Tilt up position 3. Set the knob to Lock position, then secure the tilt locking. ENOF00545-1 1.
  • Page 50 ENGINE OPERATION 2. Lift up the outboard motor slightly until it is in Release position, and then outboard motor tilted down. JNOF01406-1 ENOF01413-0 1. Tilt stopper 1. Tilt release position The outboard motor can also be tilted up ENOM00069-B Power Tilt type and down using the switch provided on Tilt up the bottom cowl.

  • Page 51: Shallow Water Operation

    ENGINE OPERATION board motor will be tilted up when shifting in ENOW00053-0 reverse. CAUTION ENOW00873-1 While in shallow water drive position, do not operate the outboard motor in Reverse. WARNING Operate the outboard motor at slow speed and keep the cooling water intake sub- Before opening the manual relief valve, make merged.
  • Page 52 ENGINE OPERATION ENOF00551-1 1. Tilt release position ENOF00549-0 ENOM00069-A 1. Tilt lever Power Tilt type 2. Shallow water running position 1. Operate the Power Tilt switch and tilt the outboard motor up into desired ENOM00541-A Manual tilt type (EP type) shallow water running position.

  • Page 53: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR Fuel leakage is a fire or explosion hazard, ENOM00070-C which can cause serious injury or death. 1. Removing the outboard motor ENOW00065-1 WARNING ENOW00064-1 CAUTION Close air vent screw on fuel tank before car- rying or storing outboard motor and fuel Engine may be hot immediately after opera- tank, or fuel may leak, potentially catching...

  • Page 54: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOF00075-1 ENOW00068-0 WARNING Close air vent screw of fuel tank and fuel cock before carrying or storing outboard motor and fuel tank, or fuel may leak, poten- tially catching fire. ENOF01416-1 ENON00021-3 Note ENOW00071-0 CAUTION If the outboard motor must be laid down, be sure that fuel is completely drained,...
  • Page 55 REMOVING AND CARRYING THE OUTBOARD MOTOR ENOF00074-B 1. Ground clearance should be provided sufficiently. 2. Transom saver bar ENOW00067-0 WARNING Do not go under outboard motor tilted up even if it is supported by support bar, or accidental fall of outboard motor could lead to severe personal injury.

  • Page 56: Adjustment

    ADJUSTMENT EFT type ENOM00073-0 1. Steering friction Tiller handle type ENOW00977-0 WARNING Do not overtighten the steering friction bolt or lever, it could result in difficult handling of the outboard motor, resulting in the loss of control causing an accident and could ENOF01418-0 lead to severe injury.

  • Page 57: Remote Control Lever Friction

    ADJUSTMENT ENOM00075-0 ENOM00076-0 3. Remote control lever friction 4. Trim tab adjustment EP, EPT type ENOW00076-1 ENOW00074-1C WARNING WARNING Be sure that the outboard motor is secured to transom or service stand, or Do not over tighten the remote control accidental drop or fall of outboard motor throttle friction adjustment screw or it could lead to severe personal injury.
  • Page 58 ADJUSTMENT ENOF02449-0 1. Trim tab ENON00022-A Notes After adjustment securely tighten the trim tab fixing bolt. Check for looseness of the bolt and the trim tab at regular intervals.

  • Page 59: Inspection And Maintenance

    INSPECTION AND MAINTENANCE ENOM00077-1 Care of your outboard motor To keep your outboard motor in the best operating condition, it is very important that you perform daily and periodic maintenance as suggested in the mainte- nance schedules as follows. ENOW00077-1 CAUTION Your personal safety and that of your pas- sengers depends on how well you main-...

  • Page 60: Daily Inspection

    INSPECTION AND MAINTENANCE ENOM00551-0 1. Daily Inspection Perform the following checks before and ENOW00078-1 after use. WARNING Do not use outboard motor if any abnormal- ity is found during pre-operation check oth- erwise it could result in severe damage to the motor or severe personal injury.
  • Page 61 INSPECTION AND MAINTENANCE ENOM00081-D ENON00024-0 Oil level checking Note If the oil level is low, or too high, the life The oil level should be checked when the of the engine will be shortened signifi- engine is cooled. cantly. ENON00025-0 1.
  • Page 62 INSPECTION AND MAINTENANCE level, use fresh water to remove salt, chemicals or mud. And flush cooling water passage after every use or before storing outboard motor for long time. Before flushing, remove the propeller and the forward thrust holder. ENOM00085-A Flushing attachment ENOW00921-0 CAUTION...
  • Page 63 If the fuse continues to blow, request an 2. Run at idling only authorized Tohatsu dealer to inspect the 3. Remove the propeller (See page 70) outboard motor.
  • Page 64 INSPECTION AND MAINTENANCE 1. Stop the engine and disconnect the battery cable from the battery nega- tive (-) terminal. 2. Remove the engine cover. 3. Remove the fuse box lid. 4. Remove the fuse and check it. If the fuse is blown, replace it with a fuse of the same specified rating.

  • Page 65: Periodic Inspection

    INSPECTION AND MAINTENANCE ENOM00555-1 2. Periodic Inspection It is important to inspect and maintain your outboard motor regularly. Make sure to per- form each service at interval specified in the chart below. Maintenance intervals are determined by the number of hours outboard motor has been used or number of months, whichever comes first.
  • Page 66 INSPECTION AND MAINTENANCE ENON00030-1 Note It is highly recommended that your outboard motor to go through complete inspection at 300 hours of use. ENOM00091-C ENOW00933-0 Engine oil replacement CAUTION ENOW00091-1 Engine oil mixed with dust or water will dra- CAUTION matically shorten the life of the engine.
  • Page 67 INSPECTION AND MAINTENANCE 7. CAUTIONReset the engine in a vertical position. Oil volume needed for complete oil replacement Approximately 800 mL(27 fl.oz.) 8. Repeat 2 to 7 procedures two or three times to drain the trapped oil ENOW00925-0 completely. CAUTION 9.
  • Page 68 INSPECTION AND MAINTENANCE ENOM00093-A ENOM00096-A Fuel filters and fuel tank cleaning Fuel filter (for fuel tank) Water or dirt in the fuel tank will cause ENOW00093-1 engine performance problems. WARNING Check and clean the tank at specified Gasoline and its vapor is very flammable and times or after the outboard motor has can be explosive.
  • Page 69 INSPECTION AND MAINTENANCE accidental drop or fall of outboard motor could lead to severe personal injury. Be sure to lock the outboard motor in the tilt up position, or accidental fall of out- board motor could lead to severe per- sonal injury.
  • Page 70 INSPECTION AND MAINTENANCE 1. Put a piece of wood block between ENOW00928-1 propeller blade and anti-ventilation CAUTION plate to hold propeller. If gear oil is spilled, wipe off immediately and dispose according to the local regulations. ENON00032-1 Note If the gear oil color appears to be milky color, contact your dealer.
  • Page 71 INSPECTION AND MAINTENANCE 6. Tighten the propeller nut to specified 1. Stop the engine. torque and align one of the grooves 2. Remove the top cowl. with propeller shaft hole. 3. Remove the spark plug caps. Propeller nut torque: 4. Remove the spark plugs by turning it 12 N·m (9 ft ·...
  • Page 72 INSPECTION AND MAINTENANCE spark plug adjusted to the correct torque as soon as possible with a torque-wrench. ENOF01427-0...
  • Page 73 INSPECTION AND MAINTENANCE ENOM00088-1A Anode replacement A sacrificial anode protects the outboard motor from galvanic corrosion. Anode is located on the gear case, cylinder etc.. When the anode is eroded more than 1/3 of original size, replace it. ENON00029-1 Notes Never grease or paint the anode.
  • Page 74 INSPECTION AND MAINTENANCE ENOM00089-B 1. Oil cap Power Tilt oil checking 2. Oil level Recommended oil ENOW00088-0 Use automatic transmission fluid or WARNING equivalent. Recommended oil is as shown below. Be sure that outboard motor is secured to transom or service stand, or accidental ATF Dexron III drop or fall of outboard motor could lead to severe personal injury.
  • Page 75 INSPECTION AND MAINTENANCE ENOM00960-1 Grease point Apply waterproof grease to the parts shown below. ENOF01429-0...

  • Page 76: Off-Season Storage

    INSPECTION AND MAINTENANCE 2. Remove the fuel hose from the out- ENOM00100-A 3. Off-season storage board motor. 3. Drain all fuel from the fuel hoses, fuel ENOW00934-0 pump and carburetor (See page 78), WARNING and clean these parts. Keep in mind that if gasoline is kept in Be sure to disconnect fuel connector the carburetor for a long time, gum except when operating engine.
  • Page 77 INSPECTION AND MAINTENANCE 9. Place the outboard motor in the ver- down on the cushion as shown in the drawing. tical position under a dry condition. ENOF01415-0 ENOM00950-0 Adding a fuel stabilizer When adding a fuel stabilizer additive (commercially available), first fill the fuel tank with fresh fuel.
  • Page 78 INSPECTION AND MAINTENANCE 8. Check the drained fuel for the pres- ENOM00970-0 Fuel system draining ence of water or other contaminants. ENOW00028-A If either is present, refill the carbure- WARNING tor with fuel, and then drain the fuel again. Repeat this procedure until no For details on handling fuel, contact an water or other contaminants are authorized dealer.

  • Page 79: Pre-Season Check

    INSPECTION AND MAINTENANCE 5. Recharge the battery once a month 9. Run the engine for 10 minutes at half to prevent it from discharging and the throttle. The oil used for storage electrolyte from deteriorating. inside the engine will be circulated out to assure optimum performance.

  • Page 80: Cold Weather Precautions

    INSPECTION AND MAINTENANCE ENOM00106-1 ENOM00120-2 6. Cold weather precautions 8. Auxiliary outboard motor operation If you moor your boat in cold weather at temperatures below 0°C (32°F), water When the auxiliary outboard motor is not residue in water pump may freeze and in operation, be sure to remove the stop may damage the pump, impeller, etc.

  • Page 81: Troubleshooting

    TROUBLESHOOTING ENOM01109-0 If you encounter a problem, check the list below to determine the cause and to take the proper action. An authorized dealer will always be happy to provide any assistance and information. Possible cause Empty fuel tank Incorrect connection of fuel system Air entering fuel line Deformed or damaged fuel hose Closed air vent on fuel tank...
  • Page 82 TROUBLESHOOTING Possible cause Low compression Carbon deposits in the combustion chamber Incorrect valve clearance Low oil pressure/level Low oil level Use of improper oil Oil deterioration Clogged oil strainer Faulty oil pump Incorrect adjustment of throttle link Insufficient cooling water flow, clogged or defective pump Faulty thermostat Cavitation or ventilation...
  • Page 83 ACCESSORIES KIT ENOM00562-1 The followings are a list of the tools and spare parts provided with the motor. Items Quantity Remark Tool bag Pliers Socket wrench 10 × 13 mm Service tools Socket wrench 16 mm (spark plug) Socket wrench handle Screwdrivers Cross-and straight-point Screwdriver handle...
  • Page 84 PROPELLER TABLE ENOM00111-0 Use a genuine propeller. A propeller must be selected so that the engine RPM measured at wide open throttle while cruising is within the recommended range. 5000–6000 min (rpm) Propeller Size (Diameter × pitch) Propeller Mark No. of Blades Light boats 8.9 ×...
  • Page 88 O W N E R’ S M A N U A L MFS 6BZ MFS 8B MFS 9.8B 5-4, Azusawa 3-Chome, Itabashi-Ku Tokyo 174-0051, Japan Tel: +81-3-3966-3117 Fax: +81-3-3966-0090 www.tohatsu.com...

This manual is also suitable for:

Mfs 8bMfs 9.8b

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