TOHATSU MFS 3.5C Owner's Manual
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TOHATSU MFS 3.5C Owner's Manual

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O W N E R' S
M A N U A L
AAAA
MFS 2.5C
MFS 3.5C
OB No.003-11152-0AK2

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  • Page 1 O W N E R’ S M A N U A L AAAA MFS 2.5C MFS 3.5C OB No.003-11152-0AK2...
  • Page 2 MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2019 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: ENOF01601-0 ENOF01600-1...
  • 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. TOOL KIT AND SPARE PARTS 13.

  • 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 41).

  • 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 2.15 (28 : 13) Emission Control System EM (Engine modification) Operator Sound Pressure 79.1 (ICOMIA 39/94) dB (A) Hand Vibration Level (ICOMIA 38/94) m/sec2 Remark: Specifications 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 ENOF00201-1 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 Locations of warning labels ENOF01605-2 Warning regarding owner’s manual. Warning regarding high temperature. 3WE-72180-000 3GR-76191-0 Warning regarding stop switch (See page 26, 31) ENOF00131-B...
  • Page 16 LABEL LOCATIONS Warning regarding rotating parts, high voltage, high temperature. 3GT-72183-0 Warning regarding fuel tank cap (See page 25). ENOF00012-0...
  • Page 17 MODEL YEAR AND MONTH ENOF01606-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 18: Installation

    INSTALLATION ENOM00024-B 1. Mounting the outboard motor on boat ENOW00006-0 WARNING Most boats are rated and certified in terms of 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 19: Altitude Adjustment Kit Requirement

    Mounting the outboard motor may increase its emissions and decrease 1. Set the outboard motor to appropri- fuel efficiency and performance. Contact ate position. authorized Tohatsu dealer for more 2. Tighten the clamp screws by turning detail. their handles.

  • Page 20: Pre-Operating Preparations

    ENOW00020-1 ALCOHOL CAUTION The fuel system components on your When operating a TOHATSU engine on gaso- TOHATSU engine will withstand up to 10% line containing alcohol, storage of gasoline in ethyl alcohol (hereinafter referred to as the fuel tank for long periods should be the "ethanol"), content in the gasoline.

  • Page 21: Fuel Filling

    PRE-OPERATING PREPARATIONS storage if alcohol has washed protective oil Be sure to remove the static electricity films from internal components. charged in your body before refueling. The sparks due to static electricity may cause explosion of flammable gasoline. ENOW00018-0 Stop the engine, and do not start the WARNING engine during refueling.

  • Page 22: Engine Oil Filling

    PRE-OPERATING PREPARATIONS 1. Full open the air vent screw on the ENOM00037-1 3. Engine oil filling tank cap and release internal pres- sure. ENOW00022-1 CAUTION The engine oil is drained for shipping from the factory. Be sure to fill the engine to the proper level before starting engine.
  • 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 ENOF00239-1 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 Always attempt to stay on the windward side of emission. require break-in for the moving compo- nents a ccording to the conditions described in the following time table. ENOW00023-1 Please refer to ENGINE OPERATION sec- CAUTION...

  • Page 25: Engine Operation

    ENGINE OPERATION ENOM00042-F ENOM00044-D 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 26: Starting The Engine

    ENGINE OPERATION 3. Over 10 cm (4 in.) ENOM00045-G 2. Starting the engine ENOW00036-0 ENOW00958-0 CAUTION WARNING Be sure to stop engine immediately if cooling Do not remove or install the top cowl water check port is not discharging water, after the engine has been started.
  • Page 27 ENGINE OPERATION 2. Set the control lever in the Neutral 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 Attach engine stop switch lanyard to ENOW00064-0 clothing or any par t of body like arm CAUTION before starting engine. Engine may be hot immediately after operat- 1. Remove the top cowl. ing and could cause burns if touched. Allow engine to cool down before attempting to carry the outboard.

  • Page 29: Warming Up The Engine

    ENGINE OPERATION 8. Set the control lever in the Neutral 4. Remove the recoil starter. 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 sonal Flotation device) or arm and keep it attached during cruising. Do not attach the tether to a part of clothing that can be torn easily when pulled. Arrange the tether so that will not be caught by any object when pulled. Be careful not to pull the tether acciden- tally during cruising.

  • Page 31: Stopping The Engine

    ENGINE OPERATION 3. The handle upright, turn the outboard ENOW00864-0 motor at an angle of 180° and quickly CAUTION turn the shift lever to the Forward (F) side. Do not increase engine speed unnecessarily when the shift is in neutral and reverse, or engine damage may occur.
  • Page 32 ENGINE OPERATION is running. Sudden stop of engine can cause loss of steering control. It can also cause loss of boat speed, possibly leading the crew(s) and or objects on the boat to be thrown forward due to inertial force. Tiller handle type 1.

  • Page 33: Steering

    ENGINE OPERATION ENOM00910-0 Spare emergency stop switch lock A spare emergency stop switch lock is provided in the tool bag. When used as described, the emergency stop switch clip and emergency stop switch lanyard system stops the engine if the operator falls away from the controls. When an operator falls into water, be sure to use emergency stop switch lock of the spare.
  • Page 34 ENGINE OPERATION ENOM00054-0 The trim angle of the outboard motor can Improper trim angle (bow dips into the water) be adjusted to suit the transom angle of Set the thrust rod higher if the bow of the hull, and load conditions. Choose an the boat is below horizontal.

  • 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 ENOW00064-0 CAUTION 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. 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 motor and fuel tank, or fuel may leak, poten- tially catching fire. ENOW00071-0 CAUTION The tilt support device supplied on your out- board motor is not intended for towing. It is intended to support the outboard motor while the boat is docked, beached, etc.

  • Page 40: Adjustment

    ADJUSTMENT ENOM00073-0 EENOM00074-A 1. Steering friction 2. Throttle grip friction Tiller handle type ENOW00074-B WARNING ENOW00074-E WARNING Do not overtighten the throttle adjustment screw or it could result in difficulty of move- Do not over tighten the steering friction ment resulting in the loss of control causing adjustment screw it could result in difficulty an accident and could lead to severe injury.

  • Page 41: 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 mainte- nance schedules that follow. ENOW00077-0 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 signif- Do not add engine oil of brand and grade icantly.
  • Page 44 INSPECTION AND MAINTENANCE ENOM00083-B ENOM00085-B Washing outboard motor Flushing attachment ENOW00922-0 ENOW00081-0 CAUTION WARNING To prevent the engine from starting when Do not start engine without removing pro- you are near the propeller, remove the stop peller, or accidentally turning propeller switch lock.
  • Page 45 INSPECTION AND MAINTENANCE ENOM00085-A Flushing by test tank ENOW00081-0 WARNING Do not start engine without removing pro- peller, or accidentally turning propeller could cause 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 ENOM00235-0 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 number of months, which- ever comes first.
  • Page 47 INSPECTION AND MAINTENANCE Inspection intervals First 20 Every 50 Every 100 Every 200 Description Inspection procedure Remarks hours of 1 hours of 3 hours of 6 hours of 1 month months months year Bolts and Nuts Retighten. Sliding and Rotating Parts Apply and pump in grease.
  • Page 48 INSPECTION AND MAINTENANCE 3. Upper level 4. Lower level ENOF01616-1 ENOF00240-1 1. Drain hole ENON00920-0 Note 4. Tighten the oil drain screw with apply- ing oil on the sealing surface of screw. Use only recommended engine oil (See (Use new oil drain washer) page 23) Oil drain screw specified torque 18Nm (13 ft...
  • Page 49 INSPECTION AND MAINTENANCE ENOM00098-B ENON00033-0 Gear oil replacement Note ENOW00094-0 Use genuine gear oil or the recommended one (API GL-5: SAE #80 to #90). WARNING Required volume: approx. 180 mL (6.1 fl.Oz). Be sure that 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 ENOW00208-0 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 the pin apart to prevent it from falling out which could lead to the propeller coming off during operation.
  • Page 51 INSPECTION AND MAINTENANCE 6. Measure the spark plug electrode gap ENOM00087-A 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 inches). 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 NGK DCPR-6E.
  • Page 52 INSPECTION AND MAINTENANCE ENOM00088-B Anode replacement A sacrificial anode protects the outboard motor from electrolytic corrosion. Anode is located on the gear case, etc.. When the anode is eroded more than 1/3 of original size, replace it. ENON00029-0 Notes Never grease or paint the anode. At each inspection re-tighten the anode attaching bolt.
  • Page 53 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply water proof grease to the parts shown below. ENOF01622-1...

  • Page 54: Off-Season Storage

    INSPECTION AND MAINTENANCE 3. Remove the spark plugs and put a ENOM00100-A 3. Off-season storage teaspoon of engine oil or spray stor- age oil into the combustion chamber ENOW00934-0 through the spark plug holes. WARNING 4. Turn the starter motor several turns to lubricate inside the cylinder.
  • Page 55 INSPECTION AND MAINTENANCE 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. Then tighten up the steering adjustment screw to maintain its position (see page 40). ENOM00950-0 ENOF01613-1 Adding a fuel stabilizer...

  • 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 ENOM00241-0 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 Empty fuel tank Deformed or damaged fuel hose Closed air vent on fuel tank Clogged fuel filter, fuel pump, or carburetor...
  • 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: Tool Kit And Spare Parts

    TOOL KIT AND SPARE PARTS ENOM00242-0 The following 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...

  • 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: 4500–5500 min (rpm) 3.5: 5000–6000 min (rpm) ENON00245-0 Note Each size shows number of propeller blades diameters pitch.

  • Page 63: 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 and EPA, California, and Canadian regulations hy drocarbons are produce d in the require all manufacturers to provide writ- course of the combustion process.
  • Page 64 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 65 EMISSION CONTROL SYSTEM INFORMATION ENOM00034-A ENOM01008-0 EPA pressurized portable Star label fuel tank requirements This outboard motor is labeled with the EQUIPPED FOR UNITED STATES AND California Air Resources Board (CARB) CANADA MODEL star label. A description of this label is The Environmental Protection Agency presented below.
  • Page 66 EMISSION CONTROL SYSTEM INFORMATION ENOF01004-0 ENOF01002-0 ENOM01010-0 ENOM01012-0 Two Stars-Very Low Emission Four Stars-Super Ultra Low Emission The two-star label identifies engines that The four-star label identifies engines that meet the Air Resources Board’s Personal meet the Air Resources Board’s Stern- Watercraft and Outboard marine engine drive and Inboard marine engine 2009 2004 exhaust emission standards.
  • Page 67 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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