TOHATSU MFS 75A Owner's Manual
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TOHATSU MFS 75A Owner's Manual

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O W N E R' S
M A N U A L
AAAA
Original instructions
MFS 75A
MFS 90A
MFS 100A
MFS 115A
OB No.003-11159-0BX1

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Summary of Contents for TOHATSU MFS 75A

  • Page 1 O W N E R’ S M A N U A L AAAA Original instructions MFS 75A MFS 90A MFS 100A MFS 115A OB No.003-11159-0BX1...
  • Page 2 MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2020 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 ENOM00006-A To You, Our Customer Thank you for selecting a TOHATSU outboard motor. You are now the proud owner of an excellent outboard motor that will service you for many years to come. This manual should be read in its entirety and the inspection and maintenance proce- dures described later in this manual should be followed carefully.
  • Page 4 TO THE EXTENT PERMITTED BY APPLICABLE LAW, YOUR OUTBOARD MOTOR WILL NOT BE COVERED BY THE APPLICABLE LIMITED WARRANTY, IF THIS PROCEDURE IS NOT FOLLOWED. ENOM00003-0 PRE-DELIVERY CHECK Be sure that the product has been checked by an authorized TOHATSU dealer before you take delivery.
  • Page 5 ENOM00005-A Serial Number In the space below, please record the outboard motor's serial number (indicated both on the swivel bracket and on the cylinder block). The serial number will be needed when ordering parts, and when making technical or warranty inquiries. Serial Number: ENOF02400-0 ENOF02401-0...
  • Page 6 ENOM00007-0 NOTICE: DANGER/WARNING/CAUTION/Note Before installing, operating or otherwise handling your outboard motor, be sure to thoroughly read and understand this Owner's Manual and carefully follow all of the instructions. Of particular importance is information preceded by the words “DAN- GER,” “WARNING,” “CAUTION,” and “Note.” Always pay special attention to such information to ensure safe operation of the outboard motor at all times.

  • Page 7: Table Of Contents

    3. Propeller installation ......... . 24 4. TOCS (Tohatsu Onboard Communication System) installation..25 6.
  • Page 8 8. Operation with multiple outboard motors ......83 11. TROUBLESHOOTING ..........84 12.
  • 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 ENOM00009-0 SAFE OPERATION OF BOAT As the operator/driver of the 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 GENERAL SAFETY INFORMATION ENOM00010-0 SERVICING, REPLACEMENT PARTS & LUBRICANTS We recommend that only an authorized service shop perform service or maintenance on this outboard motor. Be sure to use genuine parts, genuine lubricants, or recom- mended lubricants. ENOM00011-A MAINTENANCE As the owner of this outboard motor, you should be acquainted with correct mainte- nance procedures following maintenance section of this manual (See page 60).

  • Page 12: Specifications

    SPECIFICATIONS ENOM00810-A MODEL FEATURE Model F75A F90A F100A F115A Type Transom heights Multi-function tiller handle Remote Control Power Trim & Tilt These models can be purchased with remote rigging kit or multi-function tiller han- dle. ENOM00811-A MODEL NAME EXAMPLE F 115A ETL Model descrip- Product genera- Starter...
  • Page 13 SPECIFICATIONS ENOM00013-0 F75/90/100/115A Item MODEL ET (with multi-function (with RC) tiller handle) Overall Length mm (in) 826 (32.50) 1541 (60.7) Overall Width mm (in) 540 (21.3) Overall Height L•UL mm (in) 1652 (65.1) 1779 (70.1) Transom Height L•UL mm (in) 517 (20.4) 644 (25.4) L kg (lb) 178.0 (392)
  • Page 14 (with RC) tiller handle) Operator Sound Pressure (ICOMIA 90.4 39/94 Rev.1) dB (A) Hand Vibration Level (ICOMIA 38/94 Rev.1) m/s Remark: Specifications subject to change without notice. *With propeller Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).

  • Page 15: Parts Name

    PARTS NAME ENOM00820-0 ET (with multi-function tiller handle) ENOF02402-0 Air Guide Anode Spark Plug Top Cowl Thrust Rod Oil Level Gauge Bottom Cowl Clamp Bracket Cowl Hook Lever Cooling Water Check Port Steering Friction Lever Idle Port Drive Shaft Housing Main Switch Key Manual Valve Anode...
  • Page 16 PARTS NAME ENOM00822-0 Remote control box & Fuel tank ENOF02403-0 Control Lever PTT switch Primer bulb Neutral lock arm Neutral throttle button Fuel connector (Fuel tank PTT switch Main switch side) Free throttle lever Stop switch Main switch Stop switch lock Stop switch Stop switch lanyard Stop switch lock...

  • Page 17: Label Locations

    LABEL LOCATIONS ENOM00019-A Warning label locations ENOF02404-0...
  • Page 18 LABEL LOCATIONS Warning regarding urge to read the For RC model Warning regarding stop switch lan- owner's manual. yard. 3F0-72185-000 2-1. Warning regarding emergency start- ENOF00005-D ing. For Top mount RC 2-2. Warning regarding high temperature. Warning regarding urge to read the 2-3.
  • Page 19 LABEL LOCATIONS Warning regarding gasoline (See page 26). ENOF00005-M Warning regarding gasoline (See page 26). ENOF00005-F Caution tag regarding for replenish the engine oil. (See page 28). 3VJ-72044-000...
  • Page 20 LABEL LOCATIONS ENOM00019-B CE label locations r o t 0026 l a i CAN ICES 2/NMB 2 ENOF02405-0 1. Model code (Model name) 2. Rated power 3. Dry mass weight (Without propeller, with battery cable) 4. Serial No. 5. Manufacturer name 6.

  • Page 21: Installation

    INSTALLATION ENOM01800-0 1. Mounting the outboard motor on boat ENOW00961-0 WARNING Do not over-power the boat and take care not to over-load the engine. Boat manufac- turers specify the maximum allowable engine power and complement of their boat in ENOF02406-0 accordance with certain standards and show the data on the plate attached to the boat.

  • Page 22: Battery Installation

    INSTALLATION water surface is near the bottom cowling, 3. Nut 4. Washer (small diameter)) in high waves, water may enter the engine cylinders. ENOM001816-0 Incorrect outboard motor mounting 2. Battery installation h e i g h t or e x i s t e n c e o f un d e r wa t e r object(s), such as hull bottom design, ENOW00012-0 bottom surface conditions or underwa-...
  • Page 23 INSTALLATION 2. Connect the positive leads (+) to the ENOW00014-0 positive terminal (+) of the battery, CAUTION and then connect the negative lead Make sure that the battery leads do not (—). When disconnecting the battery get stuck between the outboard motor always remove the negative lead (—) and boat when turning, etc.

  • Page 24: Propeller Installation

    INSTALLATION After installing split pin, spread the pin ENOM00123-0 apart to prevent it from falling out which 3. Propeller installation could lead to the propeller coming off during operation. ENOW00084-0 WARNING Propeller must be selected that will allow the engine to reach recommended maxi- Do not begin propeller removal and instal- mum operating range during cruising.

  • Page 25: Tocs (Tohatsu Onboard Communication System) Installation

    4. TOCS (Tohatsu Onboard Communication System) installation TOCS (Tohatsu Onboard Communication System) interface coupler can provide information regarding engine speed, fuel consumption, and various possible mal- functions via an optional interface cable. Contact authorized Tohatsu dealer for more detail. ENOF02441-0...

  • Page 26: Pre-Operating Preparations

    TOHATSU engine will withstand up to CAUTION 10% ethyl alcohol (hereinafter referred to When operating a TOHATSU engine on gaso- as the "ethanol"), content in the gasoline. line containing alcohol, storage of gasoline But even if the gasoline in your area con-...

  • Page 27: Fuel Filling

    PRE-OPERATING PREPARATIONS phase separation to take place. In addition, When or before refueling: internal corrosion may take place during Be sure to remove the static electricity storage if alcohol has washed protective oil charged in your body before refueling. films from internal components. The sparks due to static electricity may cause explosion of flammable gasoline.

  • Page 28: Engine Oil Filling

    PRE-OPERATING PREPARATIONS 1. Fully open the air vent screw on the ENOW00092-A 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 gauge, drain oil to level lower than upper limit.
  • Page 29 PRE-OPERATING PREPARATIONS 3. Remove the oil filler cap. 4. Fill the engine through the filler port with the oil to between the upper and lower limit mark on the dipstick. 5. Tighten the oil filler cap. ENOF02439-0 ENOF02440-0 1. Cowl hook lever ENOF02407-0 Engine oil recommendation 1.

  • Page 30: Break-In

    PRE-OPERATING PREPARATIONS ]ENOM00033-A 4. Break-In Your new outboard motor and lower unit Always attempt to stay on the windward side of emission. require break-in for the moving compo- nents a ccording to the conditions ENOW00023-1 described in the following time table. CAUTION Please refer to ENGINE OPERATION sec- tion (See page 35) to learn how to cor-...

  • Page 31: Warning System

    PRE-OPERATING PREPARATIONS ENOM00039-0 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 ENOF00852-1 not be stopped).
  • Page 32 PRE-OPERATING PREPARATIONS ENOM00041-A Warning indicators, faults and remedy Warning indicators Description of faults Rem- or notice Sound A lamp B lamp C lamp Normal system test Continuous when key on Engine speed exceeds High speed maximum Continuous allowable RPM Low speed Low oil pressure (*1) Continuous (*2) (*2)
  • Page 33 PRE-OPERATING PREPARATIONS Remedy ENOM00870-0 Engine oil replacement indicator Reduce the throttle to less than half function reset method opening, and move to safe place As for "Engine oil replacement indicator quickly, and stop the engine. function", informing the appropriate Check the propeller for bent or dam- timing of engine oil replacement by aged blades.
  • Page 34 PRE-OPERATING PREPARATIONS 4. Within 5-10 seconds you will here 3 beeps to inform you that you have successfully reset the system. ENOF00856-0 5. Turn the ley to the 'off' position and replace the safety lanyard lock. The engine oil replacement indicators function operates again after 100 hours operation from reset this function.

  • Page 35: Engine Operation

    ENGINE OPERATION ENOM00042-0 ENOM01804-0 Before starting 1. Fuel feeding ENOM00246-0 ENOW00029-A Oil Level checking WARNING Check the engine oil level before each use. If the oil level is low or too high, the When opening fuel tank cap, be sure to fol- low the procedure described below.
  • Page 36 ENGINE OPERATION ENOM01805-0 2. Starting the engine ENOW00958-0 WARNING Do not remove or install the top cowl ENOF02442-0 after the engine has been started. 1. Joint 2. Cap The exposed rotating engine parts or moving parts cause serious injury. 4. Connect the primer bulb to the fuel tank.
  • Page 37 ENGINE OPERATION 1. Stop switch lock ENOW00036-0 2. Main switch key CAUTION 2. Insert the main switch key. Be sure to stop engine immediately if cooling 3. Set the control lever in the Neutral water check port is not discharging water, position.
  • Page 38 ENGINE OPERATION 6. Turn the main switch key to the START ENOM01807-0 Side mount RC type position and release it to start the 1. Be sure to install the stop switch lock engine. The engine will crank continu- to the stop switch, and attach the ously until the engine starts.
  • Page 39 ENGINE OPERATION 4. Turn the main switch key to ON posi- 6. Check the cooling water from cooling tion and confirm three warning lamps water check port. light up with buzzer sound and then go off. ENOF02408-0 ENOM00974-B ENOF00851-0 Top mount RC type 1.
  • Page 40 ENGINE OPERATION 2. Insert the main switch key. ENON00942-0 Note 3. Set the control lever in the Neutral It takes maximum 4 seconds of the position. Do not use the Neutral continuous crank before the engine throttle button to open the throttle starts.

  • Page 41: Starting The Engine

    ENGINE OPERATION 6. Check the cooling water from cooling ENOM00972-0 Free throttle lever (Side mount RC water check port. type) ENOW00956-0 CAUTION Keep the free throttle lever fully closed- position when start the engine. The free throttle lever is inoperative unless the control lever is in neutral.

  • Page 42: Forward, Reverse, And Acceleration

    ENGINE OPERATION neutral, push and hold the neutral throt- Buzzer short sounded one time, when set tle button. While holding the button, to 650 min (rpm) engine speed, and tells move the lever forward to throttle up the the lowest engine speed was set. engine.
  • Page 43 ENGINE OPERATION Be careful not to pull the lanyard acciden- ENOW00863-0 tally during cruising. Unintentional stop of CAUTION engine can cause loss of control of out- board motor. Rapid loss of engine power Idle speed may be higher during warming up can lead to falling down or causing pas- of engine.
  • Page 44 ENGINE OPERATION ENOM00900-0 Side mount RC type ENOF00865-1 1. Shift lever Forward 1. Turn the throttle grip to reduce ENOF00877-1 engine speed. 1. Forward (F) 2. Neutral (N) 2. When the engine reaches trolling (or 3. Reverse (R) idling) speed, quickly pull the shift 4.

  • Page 45: Stopping The Engine

    ENGINE OPERATION Reverse 1. Quickly pull the control lever to the Reverse (R) position at 35°, where the gear is connected, while lifting up on the neutral lock arm located under the control lever grip. 2. Further rearward motion will open the throttle.
  • Page 46 ENGINE OPERATION 2. Put the shift lever in the Neutral posi- 2. Turn the main switch key to the OFF tion. position. Run the engine for 2-3 minutes at idling speed for cooling down if it has been running at full speed. ENOF00871-1 1.
  • Page 47 ENGINE OPERATION 2. Turn the main switch key to the OFF position. ENOF00938-A1 ENOF00883-1 1. Stop switch 2. Stop switch lock ENOF02411-0 2. Main switch key 3. ON 4. START 5. OFF ENOW00869-0 ENOF00869-A WARNING 1. Stop switch 2. Stop switch lock After stopping the engine: Close the air vent screw on the fuel tank cap.

  • Page 48: Steering

    ENGINE OPERATION ENOM00920-0 6. Steering ENOW00870-0 WARNING Sudden steering may cause passenger(s) to ENOF02412-0 be thrown overboard or falling down. 1. Stop switch Tiller handle type 2. Stop switch lock Right turn Move the tiller handle to the left ENOM00910-0 Spare emergency stop switch lock Left turn A spare emergency stop switch lock is...

  • Page 49: Trim Angle

    ENGINE OPERATION It is imperative that the trim angle is ENOM01815-0 7. Trim angle adjusted correctly. Incorrect adjustment will cause the boat to sway, deteriorate ENOW00043-0 engine performance and may cause unsafe steering conditions. WARNING ENOW00970-0 Do not put hand or finger in between out- board motor body and clamp bracket CAUTION when adjusting trim angle to prevent...
  • Page 50 ENGINE OPERATION ENOF00941-0 ENOF00051-1 ENOM01818-0 Improper trim angle (bow dips into the 1. Perpendicular to the water surface water) When the trim angle is too small, the bow ENOM01809-0 Improper trim angle (bow rises too will dip into the water, the speed will high) decrease, and water may enter the boat.

  • Page 51: Tilt Up And Down

    ENGINE OPERATION ENOM01820-0 ENOM00060-A Trust rod adjustment 8. Tilt up and down The trim angle at full tilt down is adjust- able by selected the thrust rod position. ENOW00055-0 WARNING Do not tilt up or down outboard motor when swimmer(s) or passenger is near to prevent them from being caught between outboard motor body and clamp bracket in case the outboard motor body falls.
  • Page 52 ENGINE OPERATION ENOM01810-0 Power Trim & Tilt type Tilt up 1. Press the power trim and tilt switch "UP" until the motor has been tilted up completely. ENOF02416-0 1. Trim rod ENOF02437-0 Tilt down 1. Release the tilt stopper from the set- up position while slightly tilting up outboard motor.

  • Page 53: Shallow Water Operation

    ENGINE OPERATION ENOM00940-0 ENOM00068-A Manual relief valve 9. Shallow water operation If the battery is dead, and the power trim & tilt switch thus inoperative, open the ENOW00051-0 manual valve completely in the Manual WARNING direction. This will allow manual tilting of the outboard motor.
  • Page 54 ENGINE OPERATION ENOM00069-A Power Trim & Tilt type 1. Operate the Power Trim & Tilt switch and tilt the outboard motor up into desired shallow water running posi- tion. ENOF02437-0 ENOF00067-2 ENOF00941-0...

  • Page 55: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOM00070-A ENOM00071-A 1. Removing the outboard 2. Carrying the outboard motor motor ENOW00933-0 ENOW00890-0 WARNING WARNING Be sure to disconnect fuel connector except when operating engine. Before installing the outboard motor on the Fuel leakage is a fire or explosion hazard, boat, hang the outboard motor with the which can cause serious injury or death.

  • Page 56: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR Keep the outboard motor in a vertical position when carrying. The optional outboard motor stand is recommended for keeping the outboard motor vertical both during transport and ENOF00075-1 storage. 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.
  • Page 57 REMOVING AND CARRYING THE OUTBOARD MOTOR ENOF00074-A 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 58: Adjustment

    ADJUSTMENT ENOM00073-0 1. Steering friction Tiller handle type ENOW00074-A WARNING Do not overtighten the steering friction lever ENOF00911-1 1. Throttle friction adjustment screw it could result in difficulty of movement 2. Decrease resulting in the loss of control causing an 3.

  • Page 59: Trim Tab Adjustment

    ADJUSTMENT Top mount type under the anti-ventilation plate. If the boat veers toward the left, direct the trim tab towards A (left from rear of boat). If the boat veers toward the right, direct the trim tab towards B (right from rear of boat).

  • Page 60: Inspection And Maintenance

    INSPECTION AND MAINTENANCE ENOM00077-0 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 main- tenance schedules that follow. ENOW00077-0 CAUTION Your personal safety and that of your pas- sengers depends on how well you main-...

  • Page 61: Daily Inspection

    INSPECTION AND MAINTENANCE ENOM00079-0 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 62 INSPECTION AND MAINTENANCE Item Points to Check Remedy • Check if the anode is securely installed. Repair if necessary Other parts • Check the anode for corrosion and deformation. Replace ENOM01823-0 Oil level checking If the oil level is low, or too high, the life of the engine will be shortened signifi- cantly.
  • Page 63 INSPECTION AND MAINTENANCE Wipe off engine oil well immediately if chemicals or mud. And flush cooling spilled and dispose of it in accordance water passage after every cruising or with local fire prevention and environ- before storing outboard motor for long ment protection regulations.
  • Page 64 And be sure to remove the propeller, when If the fuse continues to blow, request an starting the engine in the test tank. (See authorized Tohatsu dealer to inspect the page 72) outboard motor. Run the engine only at idling.
  • Page 65 INSPECTION AND MAINTENANCE ENOM01816-0 1. Stop the engine and disconnect the baterry cable from the battery (-) negative. 2. Turn the top cowl hook levers to unlock, lift and remove the top cowl. 3. Remove the grommet from the elec- tric bracket cover.

  • Page 66: Periodic Inspection

    INSPECTION AND MAINTENANCE ENOM00090-0 2. Periodic Inspection It is important to inspect and maintain your outboard motor regularly. At each interval on the chart below, be sure to perform the indicated servicing. Maintenance intervals should be determined according to the number of hours or num- ber of months, whichever comes first.
  • Page 67 INSPECTION AND MAINTENANCE Inspection intervals First 20 Every 50 Every 100 Every 200 Every 400 Description Inspection procedure Remarks hours of 1 hours of 3 hours of 6 hours of 1 hours of2 month months months year year Check/Replace if necessary. Propeller (Seepage 72) Shear pin/Split...
  • Page 68 INSPECTION AND MAINTENANCE Stop engine immediately if low oil pres- sure warning lamp is lit or oil leak is found, or engine could be severely damaged. Consult dealer. Wipe off engine oil well immediately if spilled and dispose of it in accordance with local fire prevention and environ- ment protection regulations.
  • Page 69 INSPECTION AND MAINTENANCE 12. Start the engine and idling for 5 minu- ENOW00925-0 ets, then check for no oil leaks and no CAUTION warning indicate. Wipe off engine oil well immediately if spilled and dispose of it in accordance with local fire prevention and environment protection regulations.
  • Page 70 INSPECTION AND MAINTENANCE 4. Clean the mounting base. Apply film ENOM00093-A Fuel filters and fuel tank cleaning of clean oil to O-ring. ENOW00093-A Do not use grease. WARNING Install oil filter and tighten it to specified torque by using oil filter wrench. Gasoline and its vapors are very flammable Oil filter torque: and can be explosive.
  • Page 71 INSPECTION AND MAINTENANCE 2. O-ring 3. O-ring 4. Filter 5. Float 6. Cup 7. Indication of Fuel Flow. 2. If present, disconnect hoses from the fuel connector (male) and the fuel pump. 3. Remove the cup, filter and O-rings from the fuel filter body. 4.
  • Page 72 INSPECTION AND MAINTENANCE Oil plug specified tightening torque 4N·m (3 ft lb, 0.4 kgf · · ENOW00095-0 CAUTION Do not reuse oil plug gasket. Always use new gasket and tighten oil plug properly to pre- vent entry of water into lower unit. ENOF00927-0 3.
  • Page 73 INSPECTION AND MAINTENANCE stop switch lock attached to the switch, 4. Apply water proof grease to the pro- and starter key attached, or engine could peller shaft before installing a new accidentally start leading to serious per- propeller. sonal injury. Disconnect battery cable if 5.
  • Page 74 INSPECTION AND MAINTENANCE 6. Measure the spark plug electrode gap ENOM00087-D Spark plugs replacement with a wire type feeler gauge. The gap ENOW00087-0 should be 0.8-0.9 mm (0.031-0.035 WARNING in). If the gap is different, replace the spark plug with a new one Do not reuse spark plug with damaged insulation, or sparks can leak through Use spark plug ;...
  • Page 75 INSPECTION AND MAINTENANCE ENOM00088-A Anode replacement A sacrificial anode protects the outboard motor from electrolytic corrosion. Anode is located on the gear case, cylinder etc.. When the anode is eroded more than 1/3 of original size, replace it. ENON00029-0 Notes Never grease or paint the anode.
  • Page 76 INSPECTION AND MAINTENANCE ENOF02434-0...
  • Page 77 INSPECTION AND MAINTENANCE 1. Filler cap ENOM01824-0 Power Trim & Tilt fluid checking 2. Fluid level Recommended fluid ENOW00088-0 Use an automatic transmission fluid or equiva- WARNING lent. Be sure that outboard motor is secured to Recommended power trim & tilt fluid: transom or service stand, or accidental ATF Dexron III drop or fall of outboard motor could lead...
  • Page 78 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply water proof grease to the parts shown below. ENOF02431-0...

  • Page 79: Off-Season Storage

    INSPECTION AND MAINTENANCE 2. Use a dry cloth to completely wipe off ENOM00100-A 3. Off-season storage water and salt from the electrical components. ENOW00934-0 3. Drain all fuel from the fuel hoses, fuel WARNING pump, fuel filter (See page 70) and vapor separator (See page 81), and Be sure to disconnect fuel connector clean these parts.
  • Page 80 INSPECTION AND MAINTENANCE 4. Turn the engine OFF ENON00945-0 Note Over time, oxidation of gasoline can form buildup of harmful solids called gums. Water and impurities in the fuel system can cause corrosion. To stabilize the fuel and prevent oxidation, gum buildup, and corrosion throughout the boating season, recommended to add a good fuel stabilizer to the fuel tank after each fill up.
  • Page 81 INSPECTION AND MAINTENANCE ENOM00970-0 Fuel system draining ENOW00028-A WARNING For details on handling fuel, contact an authorized dealer. Fuel and fuel vapors are extremely flamma- ble and can be explosive. If fuel is spilled, wipe it up immediately. Keep the fuel tank well away from sources of ignition, e.g.

  • Page 82: Pre-Season Check

    INSPECTION AND MAINTENANCE ENOM01825-0 ENOM01811-0 4. Pre-season check 5. Submerged outboard motor The following steps must be taken when ENOW00098-0 first using the engine after off-season CAUTION storage. Do not attempt to start submerged outboard 1. Check that the shift and throttle motor immediately after it is recovered, or function properly.

  • Page 83: Striking Underwater Object

    INSPECTION AND MAINTENANCE Otherwise, water could enter the engine ENOM00107-A 7. Striking underwater object and cause damage to it. ENOW00935-0 CAUTION Striking the sea bottom or an underwater object may severely damage the outboard motor. Follow the procedure below and consult a dealer as soon as possible.

  • Page 84: Troubleshooting

    TROUBLESHOOTING ENOM00108-0 If you encounter a problem, consult the check 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 Fuel level is low in the tank. Fuel system connection is incomplete.
  • Page 85 TROUBLESHOOTING Possible cause Battery charging is defective, or rectifier malfunctions. Battery is dead, connection is loose or corroded. Battery electrolyte level is low. Fuse is blown. Shift lever neutral (N) position is not proper. Start switch or main switch is defective.
  • Page 86 TROUBLESHOOTING Possible cause Cooling water is lacking (water pump is defective or clogged). * Thermostat operation is defective. Anti-cavitation plate is damaged. Use of mismatched propeller. Propeller is damaged or deformed. Thrust rod position is not correct. Boat is unbalanced by load position. Transom installation height is too high or too low.

  • Page 87: Accessories Kit

    ACCESSORIES KIT ENOM00109-1 The following 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 Spark plug...

  • Page 88: Propeller Table

    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 (Number of Blades x Diameter x Pitch) Propeller Mark Light boats...
  • Page 89 O W N E R’ S M A N U A L MFS 75A MFS 90A MFS 100A MFS 115A 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 90aMfs 100aMfs 115a

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