TOHATSU M40D2 EPO Owner's Manual
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TOHATSU M40D2 EPO Owner's Manual

TOHATSU M40D2 EPO 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
M 40D
M 50D
OB No.003-11038-LBB1
2
2
EN

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Summary of Contents for TOHATSU M40D2 EPO

  • 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 40D M 50D OB No.003-11038-LBB1...
  • 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 8 11. TROUBLESHOOTING ..........83 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. 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-B MODEL FEATURE Model M40D2 M50D2 Type EFTO EPTO EFTO EPTO Transom heights Tiller Handle Remote Control Multi-function tiller handle Power Tilt Gas-assisted tilt Manual tilt *1: Option ENOM00811-B MODEL NAME EXAMPLE M50D2 MFL Horse Product Model descrip- Minor Starter Steering Lubrication...
  • Page 13 SPECIFICATIONS ENOM01650-0 40D2 50D2 MF 40D2 50D2 Item MODEL Overall Length mm (in) 1143 (45.0) Overall Width mm (in) 384 (15.1) S mm (in) 1225 (48.2) Overall Height L mm (in) 1352 (53.2) S mm (in) 403 (15.9) Transom Height L mm (in) 530 (20.9) S kg (lb)
  • Page 14 SPECIFICATIONS 40D2 50D2 Item MODEL Operator Sound Pressure 91.2 (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 15 Gear Reduction Ratio 1.85 (13 : 24) Operator Sound Pressure 91.2 (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 16: Parts Name

    PARTS NAME ENOM01653-0 40D2MF/50D2MF ENOF1902-0 1 Tilt Handle 10 Oil Plug (lower) 19 Starter Handle 2 Top Cowl 11 Water Strainer 20 Stop Switch 3 Hook Lever 12 Oil Plug (upper) 21 Choke Knob 4 Water Check Port 13 Clamp Bracket 22 Anode 5 Reverse Lock Lever 14 Thrust Rod...
  • Page 17 PARTS NAME ENOM01656-0 40D2EFTO/50D2EFTO ENOF01952-0 1 Tilt Handle 12 Water Strainer 23 Pilot Lamp 2 Top Cowl 13 Oil Plug (upper) 24 Main Switch 3 PTT Switch 14 Clamp Bracket 25 Battery Cords 4 Hook Lever 15 Thrust Rod 26 Power Trim & Tilt 5 Water Check Port 16 Clamp Screw 27 Anode...
  • Page 18 PARTS NAME ENOM01657-0 40D2EPO/50D2EPO ENOF01953-0 1 Tilt Handle 11 Water Strainer 21 Oil Tank 2 Top Cowl 12 Oil Plug (upper) 22 Fuel Filter 3 Hook Lever 13 Clamp Bracket 23 Spark Plug 4 Water Check Port 14 Thrust Rod 24 Oil Filter 5 Reverse Lock Lever 15 Clamp Screw...
  • Page 19 PARTS NAME ENOM01658-0 40D2EPTO/50D2EPTO ENOF01954-0 1 Tilt Handle 10 Propeller 19 Battery Cords 2 Top Cowl 11 Oil Plug (lower) 20 Power Trim & Tilt 3 PTT Switch 12 Water Strainer 21 Anode 4 Hook Lever 13 Oil Plug (upper) 22 Oil Tank 5 Water Check Port 14 Clamp Bracket...
  • Page 20 PARTS NAME ENOM00822-0 Remote control box & Fuel tank ENOF00127-F2 Control Lever Fuel Gauge Neutral Lock Arm Air Vent Screw PTT Switch Fuel Tank Cap Free Throttle Lever Fuel Connector (Engine Main Switch side) Stop Switch Primer Bulb Stop Switch Lock Fuel Connector (Fuel tank Stop Switch Lanyard side)

  • Page 21: Label Locations

    LABEL LOCATIONS ENOM01659-0 Warning label locations 1, 2 ENOF01955-5...
  • Page 22 LABEL LOCATIONS 1, 3. Read owner's manual. For RC model Be sure to fasten one end of the stop switch lanyard to your body during operation. 3F0X72185-0 Engine stop switch. (See page 44). ENOF00008-1 Warning regarding gasoline (See page 30). ENOF00131-B HOT SURFACE Can cause burns.
  • Page 23 LABEL LOCATIONS Warning regarding gasoline (See page 30). ENOF00005-M Warning regarding gasoline (See page 30). ENOF00005-F...
  • Page 24 LABEL LOCATIONS ENOM01001-0 Serial number label locations 1521 CAN ICES-2 / NMB-2 ENOF01904-3 1. Model code (Model name) 2. Serial No. 3. Rated power 4. Dry mass weight 5. Manufacturer name 6. Manufacturer 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 25: Installation

    INSTALLATION ENOM00024-A ENOW00009-2A 1. Mounting the outboard WARNING motor on boat Mounting the outboard motor without following this manual can lead to unsafe conditions such as poor maneuverability, ENOW00006-1B lack of control or fire. WARNING Loose clamp screws and/or mounting hardware can lead to the release or dis- To avoid personal injury or damage of equip- placement of the outboard motor, possi-...
  • Page 26 INSTALLATION weight may result in boat to lose control, ENOM01201-0 even swamping or capsizing. Make sure Twin-engine Installation that there is enough distance between When installing two outboard engines, be bottom cowl and water surface to prevent sure to keep an interval of approximately water from entering the engine.
  • Page 27 INSTALLATION ENOF00612-1 ENOF00610-0 1. Bolt (12 mm × length 105 mm) 1. Clamp Screw 2. Washer (large diameter) 2. Washer (small diameter) 3. Washer (small diameter) 3. Washer (large diameter) 4. Nylon locking nut 4. Bolt (12 mm × length 105 mm) 5.

  • Page 28: Battery Installation

    INSTALLATION Tighten the bolts securely, otherwise the Charge the battery in a well-ventilated outboard motor could fall down. place. Place the battery away from any source of fire, sparks and open flames such as ENON00948-0 Note burners or welding equipment. Do not smoke near the battery when the Apply sealing agent, such as silicone battery is charging.
  • Page 29 INSTALLATION * The battery should be purchased sepa- rately and is not supplied with the out- board motor. 1. Place the battery box in a convenient position away from possible water and moisture. Securely fasten both the box and the battery so they do not shake loose.

  • Page 30: Pre-Operating Preparations

    ETHANOL CAUTION The fuel system components on your When operating an outboard motor with TOHATSU outboard motor will withstand gasoline containing ethanol, storing gasoline up to 10% ethyl alcohol (hereinafter in the fuel tank for long periods should be referred to as the "ethanol") content in avoided.

  • Page 31: 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 32: Engine Oil Recommendation

    PRE-OPERATING PREPARATIONS ENOF00027-B 1. Air vent screw 2. Fuel tank cap ENOF01963-0 2. Open the fuel tank cap slowly. 1. Genuine or recommended engine oil 3. Fill the fuel carefully not to overflow. 2. Filler lid 3. Oil tank cap ENOW0002A-A CAUTION Use of engine oils that do not meet these...
  • Page 33 PRE-OPERATING PREPARATIONS Pre-mixing type When portable fuel tank is used for Add engine oil into fuel tank. The mixing operation of outboard motor(s): ratio of gasoline and oil is 50:1. Make sure Pour engine oil into fuel tank, and then, gasoline. that gasoline and oil are mixed well.
  • Page 34 PRE-OPERATING PREPARATIONS Put cap on the container, and close During break-in tightly. Add engine oil into fuel tank. The mixing Shake the container to mix engine oil ratio with gasoline during break-in is 50:1 and gasoline well. Make sure that gasoline and oil are mixed Pour the fuel into fuel tank.
  • Page 35 PRE-OPERATING PREPARATIONS ENOM00645-0 Oil pump air vent Visually check whether there is air in the oil through the vinyl pipe connecting the oil tank with the oil pump. If present, Purge the air as follows: Loosen the air vent screw on the oil pump to purge the air, and tighten it when all air, as seen through the vinyl pipe on the oil pump side, has been...

  • Page 36: Break-In

    PRE-OPERATING PREPARATIONS ENOM00033- 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 37: Warning System

    PRE-OPERATING PREPARATIONS ENOM00039-1 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. The warning lamp (LED) will synchronize with the buzzer and engine speed will be limited (engine will ENOF01957-0 not stop).
  • Page 38 PRE-OPERATING PREPARATIONS ENOM00041-D Warning indicators, faults and remedy Warning indicators Description of faults Remedy Sound High Lamp speed speed Engine speed exceeds Continuous*1 maximum allowable min (rpm) Low oil level Continuous*1 Over heating Continuous*2 *1 Remote control type only *2 Option High speed ESG (Electronic Safety Governor) High speed ESG is a device to prevent over revolution of the engine.
  • Page 39 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 40: Engine Operation

    ENGINE OPERATION ENOM00042-0 ENOM00656-A Before starting 1. Engine oil feeding ENOW00022-2 When the engine is new or have been left CAUTION without operation for a long time, or just after the engine is overhauled, be sure to The engine oil is drained for shipping at the execute the following operation for factory.

  • Page 41: Fuel Feeding

    ENGINE OPERATION 2. Open the fuel tank cap slowly and release internal pressure completely. After that, close the fuel tank. 3. Connect the fuel connector to the engine and fuel tank. ENOF00652-B 1. Rod snap 2. Control lever 3. Open side position ENOF01905-0 4.

  • Page 42: Starting The Engine

    ENGINE OPERATION Do not squeeze primer bulb with engine ENOW00036-1 running or when the outboard motor is CAUTION tilted up to avoid fuel from overflowing. Operating outboard motor without cooling ENOM00045-A water will lead to overheating and damage on 3. Starting the engine the outboard motor severely.
  • Page 43 ENGINE OPERATION 3. Set the throttle grip to START posi- ENOM01662-0 Tiller handle type tion. 1. Be sure to install the stop switch lock to the stop switch, and attach the stop switch lanyard securely to the operator or to the operator's PFD (Personal Flotation Device.) ENOF01908-1 1.
  • Page 44 ENGINE OPERATION (For manual starter type) 6. Return the choke knob fully after engine has started. 4. Pull the starter handle slowly until you feel engagement, keep pulling till you 7. Make sure that water is being dis- feel less resistance. Then pull it charged from cooling water check quickly.
  • Page 45 ENGINE OPERATION 3. Set the control lever in the Neutral 8. Make sure that water is being dis- position. charged from the cooling water check port. 4. Raise the free throttle lever a little ( b o th of c old e ng in e an d warm engine).
  • Page 46 ENGINE OPERATION 1. Remove the top cowl. 4. Insert the knotted end of the starter rope into the notch in the flywheel and wind the rope clockwise around the flywheel several turns. ENOF01961-0 ENOF01345-0 2. Remove starter lock cable from recoil 5.

  • Page 47: Warming Up The Engine

    ENGINE OPERATION 8. Pull the starter handle slowly until you ENOM00044-A Engine speeds feel engagement, keep pulling till you Idling speed after warming up. feel less resistance, then pull it Clutch in (In gear) Clutch off (Out of gear) quickly. 750 min (rpm) 900 min...

  • Page 48: Forward, Reverse, And Acceleration

    ENGINE OPERATION ENOM00046-A ENOW00861-1 5. Forward, reverse, and WARNING acceleration Do not shift at high boat speed, or control may be lost, fall down or causing passen- ENOW00037-1 ger(s) to be thrown overboard. Leading to serious personal injury. WARNING Before shifting into forward or reverse, make ENOW00867-1 sure that boat is properly moored and out- WARNING...
  • Page 49 ENGINE OPERATION ENOM00890-A Tiller handle type ENOW00865-A CAUTION Do not force to shift when the throttle grip is not in the fully closed position, otherwise, steering system and/or shifting mechanism may be damaged. Forward ENOF01908-1 1. Turn the throttle grip to reduce 1.

  • Page 50: Stopping The Engine

    ENGINE OPERATION 2. Put the shift lever in the Neutral posi- tion. Run the engine for 2-3 minutes at idling speed for cooling down if it has been running at full speed. 3. Turn the main switch key to the OFF position or push the stop switch.
  • Page 51 ENGINE OPERATION 2. Turn the main switch key to the OFF position or push the stop switch. (Do not forget to turn the key off). ENOF00869-A ENOF00871-1 1. Stop switch 1. ON 2. Stop switch lock 2. START 3. OFF ENOM00910-1 Spare emergency stop switch lock (For ENOW00869-1...

  • Page 52: Steering

    ENGINE OPERATION ENOM00920-0 ENOM00050-0 7. Steering 8. Trim angle ENOW00870-1 ENOW00043-1 WARNING WARNING Sudden steering may cause passenger(s) to Adjust the trim angle when the engine is be thrown overboard or fall. stopped. Do not put hand or finger in between out- Tiller handle type board motor body and clamp bracket when adjusting trim angle to prevent pos-...
  • Page 53 ENGINE OPERATION Manual Tilt type ENOM00052-0 Proper trim angle The position of the thrust rod is correct if the hull is horizontal during operation. ENOF00674-A ENOF00051-1 1. Thrust rod 1. Perpendicular to the water surface 2. Higher 3. Lower ENOM00053-0 Improper trim angle (bow rises too high) Power Trim &...

  • Page 54: Tilt Up And Down

    ENGINE OPERATION 4. Remove the thrust rod as show pic- 6. Reinstall the thrust rod in the desired ture. position securely. 7. Put the snap pin back and unlock the tilt stopper. 8. Gentry tilt down the outboard motor. ENOM00060-A 9.
  • Page 55 ENGINE OPERATION ENON00921-1 ENOM00063-1 Note Tilt down Pull the reverse lock lever upward until it After use, leave the outboard motor comes to a stop (This is the tilt down upright for a minute to drain the water position), lift up the outboard motor to from inside the engine.
  • Page 56 ENGINE OPERATION tilted manually. ENOW00872-1 WARNING Make sure the manual relief valve is closed before operating the outboard motor. If the ENOF00067-2 manual relief valve is not closed, the out- board motor will be tilted up when shifting in reverse. ENOW00873-1 WARNING Before opening the manual relief valve, make...

  • Page 57: Shallow Water Operation

    ENGINE OPERATION Manual tilt type ENOM00068-A 10.Shallow water operation 1. Shallow water running position: Put the reverse lock lever in the tilt up position, and tilt up the outboard ENOW00051-0 motor to put the outboard motor in WARNING the shallow water running position. During shallow water operation, be careful not to place your hand between the swivel bracket and the clamp bracket.
  • Page 58 ENGINE OPERATION ENOM0006A-0 Power Trim & Tilt type 1. Operate the Power Tilt switch and tilt the outboard motor up into desired shallow water running position. ENOF00067-2 ENOF02358-0...

  • Page 59: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR ENOM00070-A 1. Removing the outboard motor ENOW0006-1B WARNING To avoid personal injury or damage of equip- ment , make sure the allowable lifting capac- ity of the hoist is at least twice the weight of the outboard motor.

  • Page 60: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR through the exhaust por t and cause engine problems. ENOF00680-0 ENOM00072-C ENOF01727-0 3. Trailering ENOW00072-0 Keep the outboard motor in a vertical CAUTION position when carrying. The optional outboard motor stand is Trailering in the tilted position may cause recommended for keeping the outboard damage to the outboard motor, boat, etc.
  • Page 61 REMOVING AND CARRYING THE OUTBOARD MOTOR intended to support the outboard motor while the boat is docked, beached, etc. When transporting a boat on a trailer with the outboard motor attached, dis- connect the fuel line from the outboard motor beforehand and keep the out- board motor in the vertical or on a tran- som saver bar.

  • Page 62: Adjustment

    ADJUSTMENT ENOM00073-C ENOM00074-A 1. Steering friction 2. Throttle grip friction Tiller handle type ENOW00074-1B WARNING ENOW00074-2 WARNING Do not overtighten the throttle adjustment screw or it could result in difficult handling Steering may be difficult when steering fric- of the outboard motor, resulting in the loss tion adjustment bolt is over tightened, it may of control causing an accident and could also result in loss of control causing an acci-...

  • Page 63: Trim Tab Adjustment

    ADJUSTMENT causing an accident and could lead to severe ENOW00075-0 injury. WARNING To adjust the friction of the remote con- Inappropriate adjustment of trim tab could trol lever, turn the throttle friction cause steering difficulty. After installing or adjustment screw on the front of the readjusting trim tab, check if steering fiction is even.

  • Page 64: 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 65: Daily Inspection

    INSPECTION AND MAINTENANCE ENOM01664-0 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 66 INSPECTION AND MAINTENANCE Item Points to Check Action • Check if the anode and trim tab are securely installed. Repair if necessary Other Parts • Check the anode and trim tab for corrosion and deformation. Replace *1 Have this handled by your dealer. ENOM00082-A Engine oil replenishing ENOW00079-A...
  • Page 67 INSPECTION AND MAINTENANCE ENOW00920-0 CAUTION When washing the outboard motor, be care- ful not to spray the water inside of the top cowl, especially electrical components. ENON00026-0 Note It is recommended to check chemical properties of water on which your out- board motor is regularly used.
  • Page 68 When starting the outboard motor in the test tank, make sure that: request an authorized Tohatsu dealer for 1. Water level is at least 10 cm (4 in.) above inspection. the anti-ventilation plate to avoid over- 1.

  • Page 69: 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 70 INSPECTION AND MAINTENANCE ENON00030-1 Note It is highly recommended that your outboard motor to go through complete inspection at 300 hours of use. ENOM00093-A ENOM00094-0 Fuel filters and fuel tank cleaning Fuel filter (for engine) 1. Check the cup for water and debris. ENOW00093-1 WARNING Gasoline and its vapor is very flammable and...
  • Page 71 INSPECTION AND MAINTENANCE 3. Remove the cup, filter and O-rings accidental drop or fall of outboard motor could lead to severe personal injury. from the fuel filter body. Be sure to lock the outboard motor in the 4. Check the wear and clogging for each tilt up position, or accidental fall of out- part, and replace if necessary.
  • Page 72 INSPECTION AND MAINTENANCE 3. Insert the oil tube nozzle into the lower oil plug hole and fill with gear oil by squeezing the oil tube until oil flows out of the upper plug hole. Make sure that no bubbles are coming out of the upper plug hole and there is no air inside the gear case.
  • Page 73 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 74 INSPECTION AND MAINTENANCE 7. Install the spark plug by hand and turn ENOW00929-0 it carefully to avoid cross-threading. CAUTION 8. Tighten the spark plug to the speci- Use only the recommended spark plugs. fied torque. Spark plugs which have an different heat range may cause engine damage.
  • Page 75 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 76 INSPECTION AND MAINTENANCE 1. Oil cap ENOM00089-B Power Tilt oil checking 2. Oil level ENOW00076-1 Recommended oil WARNING Use an automatic transmission fluid or equivalent. Be sure that the outboard motor is Recommended oils are as shown below. secured to transom or service stand, or ATF Dexron III accidental drop or fall of outboard motor could lead to severe personal injury.
  • Page 77 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply waterproof grease to the parts shown below. ENOF01928-0...

  • Page 78: Off-Season Storage

    INSPECTION AND MAINTENANCE 2. Remove the fuel hose from the out- ENOM00100-1A 3. Off-season storage board motor. 3. Drain all fuel from the fuel hoses, fuel ENOW00934-0 pump, fuel filter (See page 70) and WARNING carburetor (See page 80), and clean these parts.
  • Page 79 INSPECTION AND MAINTENANCE 8. Stand the outboard motor up verti- cally in a dry area. ENOF00680-0 ENOM00950-1 Adding a fuel stabilizer When adding a fuel stabilizer additive (commercially available), first fill the fuel tank with fresh oil and fuel. If the fuel tank is only partially filled, air in the tank ENOF01921-0 may deteriorate the fuel during storage.
  • Page 80 INSPECTION AND MAINTENANCE 8. Check the drained fuel for the pres- ENOM00970-A Fuel system draining ence of water or other contaminants. ENOW00028-A If fuel is contaminated, reassemble WARNING the outboard motor, refill the carbu- retor with fuel, and then drain the For details on handling fuel, contact an fuel again.

  • Page 81: Pre-Season Check

    INSPECTION AND MAINTENANCE 4. Charge the battery completely before 7. Start the engine to warm up for 3 storing it for the winter. minutes in the “NEUTRAL” position. 5. Recharge the battery once a month 8. Run the engine for 5 minutes at the to prevent it from discharging and the slowest speed.

  • Page 82: Cold Weather Precautions

    INSPECTION AND MAINTENANCE ENOM00106-1 ENOM00121-0 6. Cold weather precautions 8. Operation with multiple outboard motors If you moor your boat in cold weather at temperatures below 0°C (32°F), water When operating the outboard motors in residue in water pump may freeze and reverse at more than the lowest speed, may damage the pump, impeller, etc.
  • Page 83 TROUBLESHOOTING ENOM01109-0 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. Engine Abnor- Abnor- Unable to Difficult starts but Poor Over-...
  • Page 84 TROUBLESHOOTING Engine Abnor- Abnor- Unable to Difficult starts but Poor Over- Poor mally high mally low reach to start stops accelera- heating of idling engine engine high engine immedi- tion engine speed speeds speed ately Insufficient cooling water flow Faulty thermostat Propeller cavitation Incorrect propeller selection...
  • Page 85 TOOL KIT AND SPARE PARTS ENOM01665-0 The followings are a list of the tools and spare parts provided with the motor. Name Quantity Remark Tool Bag Socket Wrench (21mm) Socket Wrench (10 x 13) Servicing Tools Socket Wrench Handle Pliers Screwdriver (Phillips-type and flat Adapter-type head)
  • Page 86 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. 40D2: 5000 - 5700 min (rpm) 50D2: 5150 - 5850 min...
  • Page 90 O W N E R’ S M A N U A L M 40D M 50D 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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