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
MFS 75A
MFS 90A
MFS 115A
OB No.003-11160-0BX1

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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 MFS 75A MFS 90A MFS 115A OB No.003-11160-0BX1...
  • 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 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 5 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 ......85 11. TROUBLESHOOTING ..........96 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 14.

  • 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 62).

  • Page 12: Specifications

    SPECIFICATIONS ENOM00810-A MODEL FEATURE Model F75A F90A 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 F75/90/115A 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-A Control Lever PTT switch Tab lock Neutral lock arm Neutral throttle button Primer bulb PTT switch Main switch Fuel connector (Fuel tank Free throttle lever Stop switch side) Main switch Stop switch lock Stop switch Stop switch lanyard...

  • Page 17: Label Locations

    LABEL LOCATIONS ENOM00019-A Warning label locations ENOF02404-A...
  • Page 18 LABEL LOCATIONS Warning regarding urge to read the For RC model Warning regarding stop switch lan- owner's manual. yard. 3WL-72180-000 Warning regarding rotating parts, ENOF00005-D electrical shock, high temperature For Top mount RC and fuel treatment. Warning regarding urge to read the owner's manual.
  • Page 19 LABEL LOCATIONS Warning tag regarding combination of Caution tag regarding for replenish the fuel tank and primer bulb ass’y the engine oil. (See page 28). (See page 37). ENOF00010-0 Warning tag regarding instructions of the fuel tank cap (See page 27). 3VJ-72044-000 ENOF00011-0 Warning regarding fuel tank cap (See...
  • Page 20 MODEL YEAR AND MONTH ENOF02405-A EPA Emissions Regulations The Emission Control Information label Outboards sold by Tohatsu America Cor- was affixed to engines as permanent evi- poration in the United States are certi- dence of EPA certification. fied to the United States Environmental...

  • 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 37) 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 ENOM01822-0 Warning indicators, faults and remedy For RC model Warning indicators Description of faults Rem- or notice Sound A lamp Normal system test Continuous when key on Engine speed exceeds High speed ESG maximum Continuous allowable RPM Low speed ESG (*2) Low oil pressure (*1) Continuous (*2) (*2)
  • Page 33 PRE-OPERATING PREPARATIONS Remedy Reduce the throttle to less than half opening, and move to safe place quickly, and stop the engine. Check the propeller for bent or dam- aged blades. Consult an authorized dealer if engine shows the same result even after replacing propeller with new one.
  • Page 34 PRE-OPERATING PREPARATIONS For Tiller handle model 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) ESG (*2)
  • Page 35 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 36 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 37: 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 38: Starting The Engine

    ENGINE OPERATION Do NOT use a primer bulb/hose assembly 1. Joint 2. Cap that does not contain a Fuel Demand Valve or a sealing mechanism as shown below: other- 4. Connect the primer bulb to the fuel wise fuel spillage may occur when the con- tank.
  • Page 39 ENGINE OPERATION sult an authorized dealer if the cause cannot ENOW00959-0 be found. CAUTION ENOW00974-0 The top cowl must be installed while the engine running except in an emergency. If CAUTION the top cowl is not installed correctly, water splash can damage the engine. Starter motor will not operate if the stop switch lock is not properly installed.
  • Page 40 ENGINE OPERATION 3. Set the control lever in the Neutral 6. Turn the main switch key to the START position. position and release it to start the engine. The engine will crank continu- ously until the engine starts. ENON00942-0 Note It takes maximum 4 seconds of the continuous crank before the engine starts.
  • Page 41 ENGINE OPERATION 4. Turn the main switch key to ON posi- ENOM01807-0 Side mount RC type tion and confirm three warning lamps 1. Be sure to install the stop switch lock light up with buzzer sound and then to the stop switch, and attach the go off.
  • Page 42 ENGINE OPERATION 6. Check the cooling water from cooling 2. Insert the main switch key. water check port. 3. Set the control lever in the Neutral position. Do not use the Neutral throttle button to open the throttle when starting the engine. ENOF02408-0 ENOM00974-B Top mount RC type...

  • Page 43: Warming Up The Engine

    ENGINE OPERATION 6. Check the cooling water from cooling ENON00942-0 Note water check port. It takes maximum 4 seconds of the continuous crank before the engine starts. If fail to start the engine, crank again after 10 seconds or more. ENOF02408-0 ENOM00043-A 3.
  • Page 44 ENGINE OPERATION tle button. While holding the button, ENOM00972-0 Free throttle lever (Side mount RC move the lever forward to throttle up the type) engine. ENOW00956-0 When the control lever is returned to the CAUTION neutral position, the button will reset automatically.

  • Page 45: Forward, Reverse, And Acceleration

    ENGINE OPERATION Buzzer short sounded one time, when set engine can cause loss of control of out- board motor. Rapid loss of engine power to 650 min (rpm) engine speed, and tells can lead to falling down or causing pas- the lowest engine speed was set.
  • Page 46 ENGINE OPERATION during warming up, it may be difficult to shift Forward back to neutral. In such case, stop engine, 1. Turn the throttle grip to reduce shift to neutral, and restart engine to warm engine speed. 2. When the engine reaches trolling (or idling) speed, quickly pull the shift ENON00014-0 Note...
  • Page 47 ENGINE OPERATION ENOM00900-0 Side mount RC type ENOF00879-2 1. Control lever ENOM00975-A Top mount RC type ENOF00877-1 1. Forward (F) 2. Neutral (N) 3. Reverse (R) 4. Fully opened (Forward) 5. Fully opened (Reverse) 6. Free throttle lever 7. Control lever 8.

  • Page 48: Stopping The Engine

    ENGINE OPERATION Reverse 2. Put the shift lever in the Neutral posi- 1. Quickly pull the control lever to the tion. Reverse (R) position at 35°, where the Run the engine for 2-3 minutes at gear is connected, while lifting up on idling speed for cooling down if it has the neutral lock arm located under been running at full speed.
  • Page 49 ENGINE OPERATION 2. Turn the main switch key to the OFF 2. Turn the main switch key to the OFF position. position. ENOF00871-1 ENOF00938-A1 1. ON 2. START 3. OFF ENOW00869-0 WARNING After stopping the engine: Close the air vent screw on the fuel tank cap.
  • Page 50 ENGINE OPERATION ENOF02412-0 1. Stop switch 2. Stop switch lock ENOM00910-0 Spare emergency stop switch lock A spare emergency stop switch lock is ENOF00883-1 provided in the tool bag. 1. Stop switch When used as described, the emergency 2. Stop switch lock stop switch clip and emergency stop switch lanyard system stops the engine if the operator falls away from the controls.

  • Page 51: Steering

    ENGINE OPERATION ENOM00920-0 ENOM01815-0 6. Steering 7. Trim angle ENOW00870-0 ENOW00043-0 WARNING WARNING Sudden steering may cause passenger(s) to Do not put hand or finger in between out- be thrown overboard or falling down. board motor body and clamp bracket when adjusting trim angle to prevent Tiller handle type injury in case the outboard motor body...
  • Page 52 ENGINE OPERATION It is imperative that the trim angle is adjusted correctly. Incorrect adjustment will cause the boat to sway, deteriorate engine performance and may cause unsafe steering conditions. ENOW00970-0 CAUTION ENOF00051-1 The power trim & tilt can be set to any trim 1.
  • Page 53 ENGINE OPERATION ENOM01820-0 Trust rod adjustment The trim angle at full tilt down is adjust- able by selected the thrust rod position. ENOF00941-0 ENOM01818-0 Improper trim angle (bow dips into the water) When the trim angle is too small, the bow will dip into the water, the speed will decrease, and water may enter the boat.

  • Page 54: Tilt Up And Down

    ENGINE OPERATION ENOM01810-0 ENOM00060-A Power Trim & Tilt type 8. Tilt up and down Tilt up 1. Press the power trim and tilt switch ENOW00055-0 "UP" until the motor has been tilted WARNING up completely. 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...
  • Page 55 ENGINE OPERATION ENOM00940-0 Manual relief valve If the battery is dead, and the power trim & tilt switch thus inoperative, open the manual valve completely in the Manual direction. This will allow manual tilting of the outboard motor. ENOW00872-0 WARNING ENOF02416-0 Make sure the manual relief valve is closed before operating the outboard motor.

  • Page 56: Shallow Water Operation

    ENGINE OPERATION ENOM00068-A ENOM00069-A Power Trim & Tilt type 9. Shallow water operation 1. Operate the Power Trim & Tilt switch and tilt the outboard motor up into ENOW00051-0 desired shallow water running posi- WARNING tion. During shallow water operation, be careful not to place your hand between the swivel bracket and the clamp bracket.

  • Page 57: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOM00070-A 1. Removing the outboard motor ENOW00890-0 WARNING Before installing the outboard motor on the boat, hang the outboard motor with the hoist or equivalent device by attaching the engine hanger to the outboard. ENOF02419-0 Use the hoist with allowable load is 250 kg (550 lbs) or above.

  • Page 58: 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 59 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 60: 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 61: 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 62: 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 63: 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 64 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 65 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 66 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 74) outboard motor. Run the engine only at idling.
  • Page 67 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 68: 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 69 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 74) Shear pin/Split...
  • Page 70 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 71 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 72 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 73 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 74 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 75 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 76 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 77 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 78 INSPECTION AND MAINTENANCE ENOF02434-0...
  • Page 79 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 80 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply water proof grease to the parts shown below. ENOF02431-0...

  • Page 81: 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 72) and vapor separator (See page 83), and Be sure to disconnect fuel connector clean these parts.
  • Page 82 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 83 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 84: 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 85: 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 86: 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 87 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 88 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 89: 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 90: 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 91: Emission Control System Information

    EMISSION CONTROL SYSTEM INFORMATION ENOM01000-0 ENOM01003-0 Emission Sources Clean Air Acts of the United States and California, and Environment Canada Carbon monoxide, oxides of nitrogen EPA, California, and Canadian regula- and hydrocarbons are produced in the tions require all manufacturers to pro- course of the combustion process.
  • Page 92 ENOM01006-0 Replacement Parts 2011. The emission control system in your Tohatsu out board motor has be en designed, built, and certified to conform with the EPA and California emission reg- ulations. Whenever requesting mainte- nance, use of Tohatsu Genuine parts is highly recommended.
  • Page 93 EQUIPPED FOR UNITED STATES AND EQUIPPED FOR UNITED STATES AND CANADA MODEL CANADA MODEL The Environmental Protection Agency TOHATSU adopts Primer bulb/hose (EPA) required portable fuel systems that assembly approved by the Environment are produced after January 1, 2011 for use Protection Agency (EPA).
  • Page 94 EMISSION CONTROL SYSTEM INFORMATION Resources Board’s Personal Watercraft ENOM01007-0 Maintenance and Out board marine engine 2001 exhaust emission standards. Follow the maintenance schedule pre- Engines meeting these standards have sented on page 70. Keep in mind that this 75% lower emissions than conventional schedule is based on the assumption that carbureted two-stroke engines.
  • Page 95 EMISSION CONTROL SYSTEM INFORMATION 2003-2008 exhaust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low Emission engines. ENOF01004-0 ENOM01012-0 Four Stars-Super Ultra Low Emission The four-star label identifies engines that meet the Air Resources Board’s Stern- drive and Inboard marine engine 2009 exhaust emission standards.
  • Page 96 O W N E R’ S M A N U A L MFS 75A MFS 90A 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 115a

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