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TOHATSU MFS 2.5C 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
EN
MFS 2.5C
MFS 3.5C
OB No.003-11151-3BB1

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Summary of Contents for TOHATSU MFS 2.5C

  • 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 2.5C MFS 3.5C OB No.003-11151-3BB1...
  • 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 BE COVERED BY THE APPLICABLE LIMITED WARRANTY, IF THIS PROCEDURE IS NOT FOL- LOWED. 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 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 F2.5C F3.5C Type Transom heights Tiller Handle Remote Control Separate fuel tank Integral fuel tank Manual tilt *1: Option ENOM00811-A MODEL NAME EXAMPLE F 3.5 CL Product genera- Model description Horse power Shaft length tion S= Short 15 in A and up F= Four stroke...
  • Page 13 Emission Control System EM (Engine modification) Operator Sound Pressure 79.1 (ICOMIA 39/94) dB (A) Hand Vibration Level (ICOMIA 38/94) m/s Remark: Specifications are subject to change without notice. Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).

  • Page 14: Parts Name

    PARTS NAME ENOM00202-0 2.5C, 3.5C ENOF00201-A Fuel Tank Cap Drive Shaft Housing Engine Oil Drain Screw Tilt Handle Thrust Rod Engine Oil Level Gauge Top Cowl Clamp Bracket Air Vent Screw Cowl Latch Clamp Screw Fuel Cock Cooling Water Check Port Throttle Grip Steering Adjustment Screw Shift Lever...

  • Page 15: Label Locations

    LABEL LOCATIONS ENOM00203-0 Warning label locations 1, 2 ENOF01605-B Read owner's manual. 3, 4-2. HOT SURFACE Can cause burns. Do not touch when operating or immediately after the engine has stopped. ENOF00120-0 Engine stop switch (See page 26, 32). 3GR-76191-0 ENOF00131-B...
  • Page 16 LABEL LOCATIONS 4-1.Warning regarding starting the engine (See page 26). 4-3. HAZARD CAUSED ROTATING PARTS Rotating parts can cause severe injury. Keep hands, feet, hair, and clothing away from all rotating parts to pre- vent injury. 4-4. ELECTRICAL SHOCK HAZARD High voltage can cause severe elec- trical shock.
  • Page 17 LABEL LOCATIONS ENOM00019-B CE label locations 1521 CAN ICES-2 / NMB-2 ENOF01606-4 1. Model code(Model name) 2. Serial No. 3. Rated power 4. Dry mass weight( Without propeller, with battery cable) 5. Manufacturer name 6. Manufacturer address 7. Authorised representative 8.

  • Page 18: Installation

    INSTALLATION ENOM00024-B 1. Mounting the outboard 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. If in doubt, contact your dealer.
  • Page 19 INSTALLATION ENON00930-0 Note Do not use tools to tighten clamp screws. Over tightening could result in damage to the clamp screws and clamp brackets. 30−50 mm (1.2−2 in) ENON00002-0 Note ENOF01608-0 A rope is not included in the standard accessories. 1.

  • Page 20: 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 21: 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 22: Engine Oil Filling

    PRE-OPERATING PREPARATIONS 1. Before opening fuel tank cap, turn air ENOM00037-1 3. Engine oil filling vent screw two times counterclock- wise to release air pressure in the fuel tank. ENOW00022-2 CAUTION The engine oil is drained for shipping at the factory.
  • Page 23 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. FULL ENOF00239-B 1. Oil filler cap 2. Oil level gauge 3. Upper level 4. Lower level Engine oil recommendation Use only high quality 4-stroke outboard motor oil to insure performance and pro-...

  • Page 24: 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 25) to learn how to cor-...

  • Page 25: Engine Operation

    ENGINE OPERATION ENOM00042-F ENOM00044-D Before starting 1. Fuel feeding ENOM00246-0 ENOW00029-1 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 26: Starting The Engine

    ENGINE OPERATION ENOM00045-G ENOW00036-1 2. Starting the engine CAUTION Operating outboard motor without cooling ENOW00958-1 water will lead to overheating and damage on WARNING the outboard motor severely. In case the cooling water check port is not discharging Do not remove or install the top cowl water, stop the outboard motor immedi- after the engine has started.
  • Page 27 ENGINE OPERATION 2. Set the control lever in the Neutral 1. Choke knob position. ENON00501-0 Note Choke is not necessary when the engine is warm. Set the throttle grip to “RE-START” position. ENON00502-0 Note If engine does not start with 4 or 5 times starting operation, push the knob back and restart.
  • Page 28 ENGINE OPERATION arm before starting engine the outboard ENOW00064-0 motor. CAUTION 1. Remove the top cowl. Engine may be hot immediately after operat- ing and could cause burns if touched. Allow engine to cool down before attempting to carry the outboard. ENOF00217-1 1.

  • Page 29: Warming Up The Engine

    ENGINE OPERATION 4. Remove the recoil starter. 8. Set the control lever in the Neutral position. 9. Pull the starter handle slowly until you feel engagement, keep pulling till you feel less resistance. Then pull it quickly. ENOF00220-0 5. Tighten the three bolts (A, B, C) fas- tening the tank and one bolt (D) fas- tening the recoil starter.

  • Page 30: Forward, Reverse, And Acceleration

    ENGINE OPERATION Arrange the tether so that will not be caught by any object when pulled. Be careful not to pull the lanyard acciden- tally during cruising. Unintentional stop of engine can cause loss of control of out- board motor. Rapid loss of engine power can lead to fall down or causing passen- ger(s) to be thrown overboard.

  • Page 31: Stopping The Engine

    ENGINE OPERATION such case, replace gear oil earlier than the 2. When the engine reaches trolling (or period specified. idling) speed, quickly pull the shift lever to the Neutral position. ENOW00864-0 3. The handle upright, turn the outboard CAUTION motor at an angle of 180° and quickly turn the shift lever to the Forward (F) Do not increase engine speed unnecessarily side.
  • Page 32 ENGINE OPERATION boat to be thrown forward due to inertial force. Tiller handle type 1. Turn the throttle grip to the slow position. ENOF00227-1 1. Fuel cock 2. Air vent screw ENOF01107-0 1. Throttle grip ENOW00869-1 2. Put the shift lever in the Neutral posi- WARNING tion.

  • Page 33: Steering

    ENGINE OPERATION ENOM00910-1 Spare emergency stop switch lock (For CE marking model) A spare emergency stop switch lock is provided in the accessories bag. Make sure that spare stop switch lock is available before operating outboard motor. When used as described, the emergency stop switch clip and emergency stop switch lanyard system stops the engine if ENOF00892-0...
  • Page 34 ENGINE OPERATION The trim angle of the outboard motor can be adjusted to suit the transom angle of the hull, and load conditions. Choose an appropriate trim angle that will allow the anti-ventilation plate to run parallel to the water surface during operation. ENOF00053-0 ENOM00052-0 Proper trim angle...

  • Page 35: Tilt Up And Down

    ENGINE OPERATION 4. Remove the thrust rod by pressing ENOW00056-A clip as shown picture. WARNING When tilting up outboard motor with fuel joint for over a few minutes, be sure to dis- connect fuel hose, or fuel may leak, poten- tially catching fire.
  • Page 36 ENGINE OPERATION ENOF00231-0 1. Tilt stopper ENOM00223-0 Tilt down Pull the outboard motor to your side and draw the tilt stopper knob out for tilting down. ENOF00231-A 1. Tilt stopper...

  • Page 37: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOM00070-H 1. Removing the outboard motor ENOW00064-1 CAUTION Engine may be hot immediately after opera- tion and could cause burns if came in con- tact. Allow engine to cool down before attempting to carry the outboard. ENOF01607-1 ENOM00071-A 2.

  • Page 38: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOF01613-1 Keep the outboard motor in a vertical ENOF01627-0 position when carrying. The optional outboard motor stand is recommended for keeping the outboard motor vertical both during transport and storage. ENOF01628-0 ENON00941-0 Note When laying the outboard front-side down, turn the clamp bracket 90°...
  • Page 39 REMOVING AND CARRYING THE OUTBOARD MOTOR ENOW00068-1 WARNING Close air vent screw on fuel tank and fuel cock before carrying or storing outboard motor and/or fuel tank, or fuel may leak, potentially catching fire. ENOW00071-0 CAUTION ENOF00074-B The tilt support device supplied on your out- 1.

  • Page 40: Adjustment

    ADJUSTMENT ENOM00073-0 EENOM00074-A 1. Steering friction 2. Throttle grip friction Tiller handle type ENOW00074-1B WARNING ENOW00074-1E WARNING Do not overtighten the throttle adjustment screw or it could result in difficult handling Do not over tighten the steering friction of the outboard motor, resulting in the loss adjustment screw or it could result in diffi- of control causing an accident and could cult handling of the outboard motor, result-...

  • Page 41: 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 42: Daily Inspection

    INSPECTION AND MAINTENANCE ENOM00228-0 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 43 INSPECTION AND MAINTENANCE ENOM00229-2 ENOM00082-B Engine oil replenishing Oil level checking Check the engine oil level before each ENOW00079-A use. If the oil level is low, or too high, the CAUTION life of the engine will be shortened sig- Do not add engine oil of brand and grade nificantly.
  • Page 44 INSPECTION AND MAINTENANCE ENOM00083-B ENOM00085-A Washing outboard motor Flushing attachment ENOW00921-0 ENOW00081-1 CAUTION WARNING Do not operate the engine when flushing the Do not start engine without removing pro- outboard motor with a hose joint as this can peller, turning propeller out in the open may cause damage to the outboard motor.
  • Page 45 INSPECTION AND MAINTENANCE ENOM00085-A Flushing by test tank ENOW00081-1 WARNING Do not start engine without removing pro- peller, turning propeller out in the open may lead to personal injury. ENOW00082-0 WARNING Never start or operate the engine indoors or in any space which is not well ventilated. Exhaust gas contains carbon monoxide, a colorless and odorless gas which can be fatal if inhaled for any length of time.

  • Page 46: Periodic Inspection

    INSPECTION AND MAINTENANCE ENOM01106-1 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 47 INSPECTION AND MAINTENANCE Inspection intervals First 20 Every 50 Every 100 Every 200 Description Inspection procedure Remarks hours or 1 hours or 3 hours or 6 hours or 1 month months months year Sliding and Rotating Parts Apply and pump in grease. Grease Nipples Outer Equipment Check for corrosion.
  • Page 48 INSPECTION AND MAINTENANCE 3. Upper level 4. Lower level ENOF01616-1 ENOF00240-A ENON00920-0 1. Drain hole Note 4. Tighten the oil drain screw with apply- Use only recommended engine oil (See ing oil on the sealing surface of screw. page 23) (Use new oil drain washer) Oil drain screw specified torque Oil volume needed for complete oil replacement...
  • Page 49 INSPECTION AND MAINTENANCE ENOM00098-B ENON00033-1 Gear oil replacement Note ENOW00076-1 Use genuine gear oil or the ones recom- mended (API GL-5: SAE #80 to #90). WARNING Required volume: approx. 180 mL (6.1 fl.oz). Be sure that the outboard motor is secured to transom or service stand, or accidental drop or fall of outboard motor could lead to severe personal injury.
  • Page 50 INSPECTION AND MAINTENANCE ENOW00086-1 CAUTION Do not install propeller without thrust holder, or propeller boss could be dam- aged. Do not reuse split pin. After installing split pin, spread bend both end of the pin apart to lock propeller in place.
  • Page 51 INSPECTION AND MAINTENANCE 6. Measure the spark plug gap with a ENOM00087-A Spark plugs replacement wire t ype feeler g auge. The g ap ENOW00087-1 should be 0.8-0.9 mm (0.031-0.035 WARNING inches). If the gap is out of specifica- tion, replace the spark plug with a Do not reuse spark plug, if the insulation is damaged or sparks can leak through new one...
  • Page 52 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 53 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply water proof grease to the parts shown below. ENOF01622-A...

  • Page 54: Off-Season Storage

    INSPECTION AND MAINTENANCE Keep in mind that if gasoline is kept in ENOM00100-A 3. Off-season storage the carburetor for a long time, gum and varnish will be developed, causing ENOW00934-0 the float valve to stick, restricting the fuel flow. WARNING 4.
  • Page 55 INSPECTION AND MAINTENANCE ENOW00066-0 CAUTION Do not carry or store outboard motor in any of positions described below. Otherwise, engine damage or property dam- age could result from leaking oil. ENOF01628-0 ENON00941-0 Note When laying the outboard front-side down, turn the clamp bracket 90° clock- wise or anti-clockwise so that it does not interfere with the ground.

  • Page 56: Pre-Season Check

    INSPECTION AND MAINTENANCE 4. Loosen the carburetor drain screw. ENOM00970-B 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 ENOF01623-0 of ignition, e.g.

  • Page 57: Submerged Outboard Motor

    INSPECTION AND MAINTENANCE 3. Before starting the engine, discon- 3. Remove the spark plugs, and com- nect stop switch lock and crank pletely drain the water from the approximately 10 times in order to engine by pulling recoil starter several circulate oil through the engine.

  • Page 58: Auxiliary Outboard Motor Operation

    INSPECTION AND MAINTENANCE 3. Return to the nearest harbor slowly and carefully. 4. Consult a dealer check the outboard motor before operation again. ENOF01145-0 ENOM00120-2 8. Auxiliary outboard motor operation When the auxiliary outboard motor is not in operation, be sure to remove the stop switch lock, shift into forward, and then tilt the outboard motor up.

  • Page 59: Troubleshooting

    TROUBLESHOOTING ENOM00109-0 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 Deformed or damaged fuel hose Closed air vent on fuel tank Clogged fuel filter, fuel pump, or carburetor Use of improper engine oil...
  • Page 60 TROUBLESHOOTING Possible cause Incorrect adjustment of throttle link Insufficient cooling water flow, clogged or defective pump Faulty thermostat Cavitation or ventilation Incorrect propeller selection Damaged and bent propeller Improper thrust rod position Unbalanced load on boat Transom too high or too low Low compression Carbon deposits in the combustion chamber Engine makes noise...

  • Page 61: Accessories Kit

    ACCESSORIES KIT ENOM00242-0 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 Socket wrench handle Screwdrivers Cross-and straight-point Screwdriver handle Emergency starter rope...

  • Page 62: Propeller Table

    PROPELLER TABLE ENOM00245-0 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. 2.5: 4500–5500 min (rpm) 3.5: 5000–6000 min (rpm) ENON00245-0 Note Each size shows number of propeller blades diameters pitch.
  • Page 66 O W N E R’ S M A N U A L MFS 2.5C MFS 3.5C 5-4, Azusawa 3-Chome, Itabashi-Ku Tokyo 174-0051, Japan Tel: +81-3-3966-3117 Fax: +81-3-3966-0090 www.tohatsu.com...

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Mfs 3.5c

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