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TOHATSU M 4C 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
M 4C
M 5B
OB No.003-11068-DBB1

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  • Page 1 O W N E R’ S M A N U A L トーハツ船外機 オーナーズマニュアル Original instructions M 4C M 5B OB No.003-11068-DBB1...
  • 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 ENOM00113-1 DECLARATION OF CONFORMITY (DoC) This product conforms to certain portion of the European Parliament directive and UK Regulations. DoC contains the following information; Name and Address of the manufacturer, EU - notified body, EU - authorized repre- sentative, and UK - approved body. Applied community directives and regulations Reference standard Description of the product.
  • 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 ENOM00009-1 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 M5B-D M5B-S Type Transom heights Tiller Handle Remote Control ( )*1 ( )*1 ( )*1 Separate fuel tank Integral fuel tank Manual tilt *1: Option ENOM00811-A MODEL NAME EXAMPLE M 5 BDL Model Horse Product Fuel tank Shaft length description...
  • Page 13 Hand Vibration Level (ICOMIA 38/94) m/s *:In case of dual fuel tank system, use it together with 12 L separate tank. 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 ENOM01401-0 4C, 5B-D, 5B-S 5B-S Separate Fuel Tank 5B-D Dual Fuel Tank ENOF02102-1 Air Vent Screw Starter Handle Choke Knob Fuel Tank Cap Shift Lever Stop Switch Tilt Handle Throttle Glip Fuel Cock Knob Top Cowl Clamp Screw Fuel Connector Bottom Cowl Clamp Bracket...
  • Page 15 PARTS NAME ENOM00822-0 Fuel tank ENOF02103-1 Air vent screw Fuel tank cap Fuel connector (Engine side) Primer bulb Fuel connector (Fuel tank side)

  • Page 16: Label Locations

    LABEL LOCATIONS ENOM01402-0 Warning label locations 1, 2 4, 5 ENOF02104-2...
  • Page 17 LABEL LOCATIONS 1, 4. Read owner's manual. Keep hands, feet, hair, and clothing away from all rotating parts to prevent injury. 3F0X72185-0 Engine stop switch (See page 34). 314X72185-0 Warning regarding gasoline (See page 23). ENOF00131-B HOT SURFACE. Can cause burns. ENOF00005-S Warning regarding...
  • Page 18 LABEL LOCATIONS ENOM01001-0 Serial number label locations 1521 CAN ICES-2 / NMB-2 ENOF02105-3 1. Model code (Model name) 2. Serial No. 3. Rated power 4. Dry mass weight 5. Manufacture name 6. Manufacture address 7. Authorised representative 8. Authorised representative address Description of serial number year code Last two digits of alphabet represent production year as below.

  • Page 19: Installation

    INSTALLATION Keep the outboard motor in a vertical ENOM00024-B 1. Mounting the outboard position when mounting. motor on boat ENOW00006-1 WARNING Most boats are rated and certified for their maximum allowable horsepower, as shown on the boat’s cer tification plate. Do not equip your boat with an outboard motor that exceeds this limit.
  • Page 20 INSTALLATION ENOM00026-0 ENOM00831-0 Transom matching Mounting the outboard motor Be sure that the anti ventilation plate of 1. Set the outboard motor to appropri- the outboard motor is 30–50 mm (1.2–21 ate position. in) below the bottom of hull. 2. Tighten the clamp screws by turning If the above condition cannot be met due their handles.

  • Page 21: 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 22: Engine Oil Recommendation

    PRE-OPERATING PREPARATIONS ENOW00018-1 Fuel by Oil Mixing (25:1, 50:1) WARNING Fuel leakage can cause fire or explosion, 1.0L (25:1) potentially leading to severe injury or loss of 25: 1 life. Ever y par t of fuel system should be 0.48L inspected periodically.

  • Page 23: Fuel Filling

    PRE-OPERATING PREPARATIONS gasoline is a may lead to a dangerous fire hazard. ENOW00028-1 WARNING Consult an authorized dealer for details on handling gasoline, if necessary. Gasoline and its vapor are very flammable and can be explosive. When carrying a fuel tank containing gaso- line: Close the fuel tank cap and air vent screw of fuel tank cap, or gasoline may evapo-...
  • Page 24 PRE-OPERATING PREPARATIONS Dispose aged or contaminated gasoline in 4. After filling the fuel tank, close the accordance with local regulations. fuel tank cap. Separate fuel tank ENOW00029-1 1. Fully open the air vent screw on the WARNING tank cap and release internal pres- When opening fuel tank cap, be sure to fol- sure.

  • Page 25: Break-In

    PRE-OPERATING PREPARATIONS ENOM00033-B 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 timetable. break-in can shorten life of the product. ENOW00024-1 If any abnormality is experienced during the break-in:...

  • Page 26: Engine Operation

    ENGINE OPERATION from engine can cause increase of internal ENOM00042-0 pressure of the tank dangerously. Before starting 1. When using integral tank ENOW00022-B Loosen the air vent screw on the tank CAUTION cap by two turns . Be sure to fill the engine before star ting engine.
  • Page 27 ENGINE OPERATION 2. Open the fuel tank cap slowly and release internal pressure completely. 3. Set fuel cock lever to which you would like to use. ENOF02113-0 1. Fuel cock 2. Close position (When using separate tank) 3. Open position (When using integral tank) ENOF02112-0 1.

  • Page 28: Starting The Engine

    ENGINE OPERATION ENOW00959-0 CAUTION The top cowl must be installed while the engine running except in an emergency. If the top cowl is not installed correctly, water splash can damage the engine. ENOW00036-1A CAUTION ENOF00861-A 1. Pull When starting the outboard motor in the 2.
  • Page 29 ENGINE OPERATION 2. Set the control lever in the Neutral ENOW00032-B position. CAUTION Do not try to crank after engine has started. This model is provided with start in gear protection. ENON00010-1 Note Start-in-gear protection prevents the ENOF02116-0 engine from starting at other than neutral shift.
  • Page 30 ENGINE OPERATION ENON00501-A Note Choke is not necessary when the engine is warm. ENON00502-0 Note If engine does not start with 4 or 5 times starting operation, push the knob back and restart. ENOF02124-0 ENON00931-0 Note 1. Cooling water check port When warming up the engine in cold we ather, set the choke knob to half ENOM00042-A...
  • Page 31 ENGINE OPERATION 1. Remove the top cowl. ENOF02222-0 ENOF02119-0 5. Tie a loop to other end of the emer- 2. Disconnect the linkage of the starter gency starter rope and attach socket lock rod. wrench that is included in the tool kit. ENOW00860-0 CAUTION Be sure to keep the harness away from the...

  • Page 32: Warming Up The Engine

    ENGINE OPERATION 9. Once the outboard motor is started, ENOM00046-A do not reinstall recoil starter and top 4. Forward, reverse, and cowl. acceleration ENOW00037-1 ENOM0004B-0 WARNING 3. Warming up the engine Before shifting into forward or reverse, make ENOW00932-1 sure that boat is properly moored and out- CAUTION board motor can be steered fully to the right and left.
  • Page 33 ENGINE OPERATION ENOW00861-1 ENOW00864-0 CAUTION WARNING Do not shift at high boat speed, or control Do not increase engine speed unnecessarily may be lost, fall down or causing passen- when the shift is in neutral and reverse, or ger(s) to be thrown overboard. Leading to engine damage may occur.

  • Page 34: Stopping The Engine

    ENGINE OPERATION ENOF02115-B1 ENOF02115-A1 1. Throttle grip 1. Throttle grip 2. START position 2. START position 3. Fully closed 3. Fully closed 4. Fully opened 4. Fully opened 2. Put the shift lever in the Neutral posi- ENOM00049-A tion. 5. Stopping the engine Run the engine for 2-3 minutes at idling speed for cooling down if it has ENOW00868-1...

  • Page 35: Steering

    ENGINE OPERATION Disconnect the battery cable, after each ENOM00920-A use. 6. Steering Emergency engine stopping ENOW00870-0 Remove stop switch lock to stop the WARNING engine. Sudden steering may cause passenger(s) to be thrown overboard or fall. Right turn Move the tiller handle to the left Left turn Move the tiller handle to the right.
  • Page 36 ENGINE OPERATION ENOW00044-1A WARNING Excessive trim up or down may cause unsta- ble boat operation, loss of control that may leads to accident during cruising. For manual tilt model, If you feel the trim is improperly positioned, stop the boat and readjust trim angle before continuing ENOF00052-0 to cruise.

  • Page 37: Tilt Up And Down

    ENGINE OPERATION 4. Remove the thrust rod as shown pic- ENOW00056-A ture. 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. ENOW00057-1 CAUTION Do not tilt up the outboard motor while...

  • Page 38: Shallow Water Operation

    ENGINE OPERATION ENOM00068-A 9. Shallow water operation ENOW00051-0 WARNING During shallow water operation, be careful not to place your hand between the swivel bracket and the clamp bracket. Be sure to tilt the outboard motor down slowly. ENOW00053-0 CAUTION ENOF00442-0 1.
  • Page 39 ENGINE OPERATION Shallow water running position: 1. With the shift lever in Neutral or For- ward, tilt the motor up slowly by about 40° and then lower the tilt lever for setting at the shallow water run- ning position. Return to normal running position: 2.

  • Page 40: Removing And Carrying The Outboard Motor

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

  • Page 41: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOF00075-1 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. ENOF02131-0 ENON00021-3 Note ENOW00071-0 CAUTION If the outboard motor must be laid down, be sure that fuel is completely drained, The tilt support device supplied on your out-...
  • Page 42 REMOVING AND CARRYING THE OUTBOARD MOTOR When transporting a boat on a trailer with the outboard motor still attached, disconnect the fuel line from the out- board motor beforehand and keep the outboard motor in the vertical or on a transom saver bar.

  • Page 43: Adjustment

    ADJUSTMENT ENOM00073-E 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 44: 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 45: Daily Inspection

    INSPECTION AND MAINTENANCE ENOM01403-0 1. Daily Inspection Perform the following checks before and ENOW00078-0 after use. WARNING Do not use outboard motor if any abnormal- ity is found during pre-operation check or it could result in severe damage to the motor or severe personal injury.
  • Page 46 INSPECTION AND MAINTENANCE ENOM00083-0 ENOM00085-E Washing outboard motor Flushing attachment 1. Tilt down the outboard motor. ENOW00081-1 2. Remove the water plug from the drive WARNING shaft housing, and screw in the flush- Do not start engine without removing pro- ing attachment.
  • Page 47 INSPECTION AND MAINTENANCE ENOM00085-A Flushing by test tank ENOW00036-1A CAUTION When starting the outboard motor in the test tank, make sure that: 1. Water level is at least 10 cm (4 in.) above the anti-ventilation plate to avoid over- heating of the engine. 2.

  • Page 48: 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 49 INSPECTION AND MAINTENANCE ENOM00093-A Fuel filters and fuel tank cleaning ENOW00093-1 WARNING Gasoline and its vapor is very flammable and can be explosive. Do not start this procedure while engine is operating or while engine is hot. Place fuel filter away from every source of ignition such as sparks or open flames.
  • Page 50 INSPECTION AND MAINTENANCE lamation. Do not throw it in the trash, pour it on the ground or down a drain. 1. Tilt down the outboard motor. 2. Remove the oil plugs (lower and upper), and completely drain the gear oil into a pan. ENOF01226-1 1.
  • Page 51 INSPECTION AND MAINTENANCE ENOW00928-1 CAUTION If gear oil is spilled, wipe off immediately and dispose according to the local regulations. ENON00032-1 Note If the gear oil color appears to be milky color, contact your dealer. ENOM00086-A Propeller replacement ENOW00084-1 ENOF01515-0 4.
  • Page 52 INSPECTION AND MAINTENANCE 1. Put a piece of wood block between 6. Tighten the propeller nut to specified propeller blade and anti-ventilation torque, and align one of grooves to plate to hold propeller. propeller shaft hole. Propeller nut torque: 12 Nm (9 ft lb, 1.2 kgf 7.
  • Page 53 INSPECTION AND MAINTENANCE gap to specification. spark plug adjusted to the correct torque as soon as possible with a torque-wrench. 1. Stop the engine. 2. Remove the top cowl. 3. Remove the spark plug cap. 4. Remove the spark plug by turning it counter-clockwise, using a 13/16"...
  • Page 54 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 55 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply waterproof grease to the parts shown below. ENOF02139-0...

  • Page 56: Off-Season Storage

    INSPECTION AND MAINTENANCE 3. Drain all fuel from the fuel hoses and ENOM00100-A 3. Off-season storage carburetor (See page 57), and clean these parts. ENOW00934-0 Keep in mind that if residue in the carburetor for a long time, gum and WARNING varnish will develop, causing the float Be sure to disconnect fuel connector...
  • Page 57 INSPECTION AND MAINTENANCE 2. Follow the instructions on the label ENOW00066-1 when adding the fuel stabilizer addi- CAUTION tive. Do not carry or store outboard motor in any 3. After adding the additive, let the out- of positions described below. board motor run in water for 10 min- Otherwise, engine's exterior parts may be utes to make sure any old fuel in the...

  • Page 58: Pre-Season Check

    INSPECTION AND MAINTENANCE 2. Remove the top cowl. 1. Check that the shift and throttle function properly. (Be sure to turn the 3. Place an approved rag under the propeller shaft when checking the drain screw and use a funnel to avoid shift function for any damage on the spilling fuel.

  • Page 59: Cold Weather Precautions

    INSPECTION AND MAINTENANCE 3. Inject a sufficient amount of engine oil through the spark plug holes. Pull the recoil starter rope several times to circulate the oil throughout the outboard motor. ENOM00106-1 6. Cold weather precautions If you moor your boat in cold weather at ENOF01145-0 temperatures below 0°C (32°F), water residue in water pump may freeze and...

  • Page 60: Troubleshooting

    TROUBLESHOOTING ENOM01109-1 If you encounter a problem, check the list below to determine the cause and to take the proper action. An authorized dealer will always be happy to provide any assistance and information. Possible cause Empty fuel tank Incorrect connection of fuel system Air entering fuel line Deformed or damaged fuel hose Closed air vent on fuel tank...
  • Page 61 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 or bent propeller Improper thrust rod position Unbalanced load on boat Transom too high or too low...

  • Page 62: Tool Kit And Spare Parts

    TOOL KIT AND SPARE PARTS ENOM01407-0 Name Quantity Remark Tool bag Pliers Socket wrench 10 × 13 mm Service tools Socket wrench 21 mm Socket wrench handle Screwdriver (Phillips-type Adapter-type and flat head) Emergency starter rope 1000 mm Spare stop switch lock Spare parts Spark plug NGK: BPR 7HS-10...

  • Page 63: Propeller Table

    PROPELLER TABLE ENOM01108-1 To ensure optimum performance, the propeller should match the boat type and its load. Use a genuine propeller. When selecting propeller, make sure that RPM stays in the maximum operating range of engine at wide open throttle.. 4: 4500–5500 min (rpm) 5: 4500–5500 min...
  • Page 68 O W N E R’ S M A N U A L M 4C M 5B 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:

M 5bM 5b-dM 5b-s4c5b-d5b-s

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