TOHATSU MFS 40A Owner's Manual
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TOHATSU MFS 40A Owner's Manual

TOHATSU MFS 40A Owner's Manual

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O W N E R' S
M A N U A L
AAAA
Original instructions
MFS 40A
MFS 50A
OB No.003-11106-8AH1

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Summary of Contents for TOHATSU MFS 40A

  • Page 1 O W N E R’ S M A N U A L AAAA Original instructions MFS 40A MFS 50A OB No.003-11106-8AH1...
  • Page 2 MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2018 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 TO THE EXTENT PERMITTED BY APPLICABLE LAW, YOUR OUTBOARD MOTOR WILL NOT BE COVERED BY THE APPLICABLE LIMITED WARRANTY, IF THIS PROCEDURE IS NOT FOLLOWED. ENOM00003-0 PRE-DELIVERY CHECK Be sure that the product has been checked by an authorized TOHATSU dealer before you take delivery.

  • Page 5: Serial Number

    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: ENOF00800-1 ENOF00801-0...
  • Page 6 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

    4. Propeller installation ......... . 25 5. TOCS (Tohatsu Onboard Communication System) installation..26 6.

  • Page 8: Motor

    7. Striking underwater object ........83 8.
  • Page 9 INDEX 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 ENOM00009-0 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 61).

  • Page 12: Specifications

    SPECIFICATIONS ENOM00810-A MODEL FEATURE Model F40A F50A Type Transom heights Tiller Handle Remote Control Power Trim & Tilt Gas-assisted tilt These models can be purchased with remote rigging kit or multi function tiller han- dle. ENOM00811-A MODEL NAME EXAMPLE F 50A ETL Model Product gen- Starter...
  • Page 13 SPECIFICATIONS ENOM00013-0 ET, EG F40A/50A ET (with EG (with Item MODEL multifunction multifunction (with RC) tiller handle) tiller handle) Overall Length mm (in) 783 (30.8) 1382 (54.4) 1382 (54.4) Overall Width mm (in) 404 (15.9) Overall Height S·L mm (in) 1257 (49.5) 1390 (54.7) Transom Height S·L mm (in)
  • Page 14 Operator Sound Pressure 81.8 (ICOMIA 39/94 Rev.1) dB (A) Hand Vibration Level – (ICOMIA 38/94 Rev.1) m/s Remark: Specifications subject to change without notice. *Without propeller, with battery cable. Tohatsu outboard is power rated in accordance with ISO8665 (propeller shaft output).

  • Page 15: Parts Name

    PARTS NAME ENOM00820-0 ET, EG (with multi-function tiller handle) Tilt Handle Tiller Handle Top Cowl Throttle Grip Bottom Cowl PTT Switch Cooling Water Warning Lamp Check Port Stop Switch Drive Shaft Stop Switch Housing Lanyard Anode Oil Filler Cap Trim Tab Spark Plug Propeller Oil Level Gauge...
  • Page 16 PARTS NAME ENOM00822-0 Remote control box & Fuel tank ENOF00127-6 Control Lever PTT switch Primer bulb Neutral lock arm Neutral throttle button Fuel connector (Fuel tank PTT switch Main switch side) Free throttle lever Stop switch Main switch Stop switch lock Stop switch Stop switch lanyard Stop switch lock...

  • Page 17: Label Locations

    LABEL LOCATIONS ENOM00019-A Warning label locations ENOF00127-D1...
  • Page 18 LABEL LOCATIONS Warning label urge to read the For RC model Warning label regarding stop switch owner’s manual . lanyard. ENOF00120-0 2-1. Warning regarding emergency ENOF00005-D starting (See page 40). For Top mount RC 2-2. Warning regarding high tempera- Warning label urge to read the ture.
  • Page 19 LABEL LOCATIONS Warning regarding gasoline (See page 27). ENOF00005-M Warning regarding gasoline (See page 27). ENOF00005-F...
  • Page 20 LABEL LOCATIONS ENOM00019-B CE label locations r o t 0123 l a i CAN ICES-2/NMB-2 ENOF00005-N 1. Model code (Model name) 2. Rated power 3. Dry mass weight (Without propeller, with battery cable) 4. Serial No. 5. Manufacturer name 6. Manufacturer address Description of serial number year code Last two digits of alphabet represent production year as below.

  • Page 21: Installation

    INSTALLATION ENOM00024-A ENOW00006-0 1. Mounting the outboard WARNING motor on boat Most boats are rated and certified in terms of their maximum allowable horsepower, as ENOW00006-C shown on the boat’s certification plate. Do WARNING not equip your boat with an outboard motor that exceeds this limit.
  • Page 22 INSTALLATION attitude. Check the position of water sur- ENOM00025-0 Position ... Above keel line face on the driveshaft housing. If the Set engine at center of boat. water surface is near the bottom cowling, in high waves, water may enter the engine cylinders.

  • Page 23: Remote Control Device Installation

    INSTALLATION ENOM00840-0 351 (13.82) 2. Remote control device 327 (12.87) installation 163.5 163.5 ENOW00850-0 Remote control box location Ø12.5 Ø12.5 1, 2 125.5 125.5 251 (9.88) ENOF00018-A ENOW00008-A ENOF00841-1 CAUTION 1. Shift cable 2. Throttle cable Mounting bolts should be installed with 3.

  • Page 24: Battery Installation

    INSTALLATION can cause serious burn or, if it comes in contact with your eye, loss of sight. Use safety glasses and rubber gloves. In case battery electrolyte comes in contact with: Skin, flush thoroughly with water. Eye, flush thoroughly with water, and then seek immediate medical treatment.

  • Page 25: Propeller Installation

    INSTALLATION can lead to poor performance of, and/or ENOM00123-0 damage to, the electrical system. 4. Propeller installation ENON00006-A Note ENOW00085-A WARNING Recommended battery: 12V 100Ah/5HR, 850 (Cold Cranking Amps (CCA), In case of Do not begin propeller removal and installa- cold whether: 12V120Ah/5HR (1000CCA)) t i o n p r o c e dur e w i t h s p a r k p lu g c a p s Specifications and features of batteries...

  • Page 26: Tocs (Tohatsu Onboard Communication System) Installation

    TOCS (Tohatsu Onboard Communication onto the shaft. System) interface coupler can provide information regarding engine speed, fuel consumption, and various malfunc- tion via an optional interface cable. Contact authorized Tohatsu dealer for more detail. ENOF00084-A 1. Propeller 2. Thrust holder 3. Stopper 4.

  • Page 27: 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 28: 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 29: Engine Oil Recommendation

    PRE-OPERATING PREPARATIONS 1. Full open the air vent screw on the properly fill the engine with oil follow the instructions, See page 68) fuel tank cap and release internal pressure. ENOF00027-B ENOF00850-0 1. Air vent screw 2. Fuel tank cap Use only high quality 4-stroke engine oil 2.

  • 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 described in the following time table. ENOW00023-1 Please refer to ENGINE OPERATION sec- CAUTION...

  • 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 intermittent short beeps and the warn- ing lamp (LED) will synchronize with the buzzer and engine speed will be limited ENOF00852-0 (engine will not be stopped).
  • Page 32 PRE-OPERATING PREPARATIONS ENOM00041-A Warning indicators, faults and remedy Warning indicators Description of faults Rem- or notice Remark Sound lamp lamp lamp Continu- Normal system test 1 second when key on High Engine speed exceeds Approx. Continu- speed maximum 6,200 min (rpm) allowable RPM Continu-...
  • Page 33 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 34 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 35: Engine Operation

    ENGINE OPERATION tank is raised by heat from sources such as ENOM00042-0 sun light. Before starting ENOW00947-0 ENOW00022-A CAUTION CAUTION When using a separate tank, be sure that the The engine oil is drained for shipping from fuel line is not kinked and is connected the factory.
  • Page 36 ENGINE OPERATION And be sure to remove the propeller, when starting the engine in the test tank. (See page 73) Run the engine only at idling. ENOF00861-A 1. Pull 2. Insert 4. Squeeze primer bulb until becomes stiff to feed fuel to vapor ENOF00863-0 separator.
  • Page 37 ENGINE OPERATION ENON00010-0 ENOW00031-0 Note CAUTION Start-in-gear protection prevents engine If the engine starts in gear, do not use it. from starting at other than neutral shift. In-gear starting of engine will move the Contact an authorized dealer. boat immediately, potentially leading to 4.
  • Page 38 ENGINE OPERATION 1. Main switch key 3. Set the control lever in the Neutral 2. Warning lamp position. Do not raise the free throt- ENOW00032-1 tle lever when starting the engine. CAUTION Do not hold turning starter motor more than 5 seconds, or the battery may be consumed, potentially making the engine star ting impossible and/or damaging the starter.
  • Page 39 ENGINE OPERATION ENOM00974-A Top mount RC type 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.) ENOF00871-1 1. ON 2.

  • Page 40: Emergency Starting

    ENGINE OPERATION 4. Turn the main switch key to ON posi- ENON00939-0 Note tion and c onfirm thre e warning The neutral throttle button can not be lamps light up with buzzer sound and push-in when the control lever shift is in then go off.
  • Page 41 ENGINE OPERATION 4. Tie a loop in the another end of the emergency starter rope and attach socket wrench that is included in the tool kit. ENOF00872-0 2. Remove the flywheel cover. ENOF00874-0 ENOW00860-0 CAUTION Be sure to keep the harness away from the rotation parts.

  • Page 42: Starting The Engine

    ENGINE OPERATION 7. Pull the starter handle slowly until you Clutch in (In gear) Clutch off (Out of gear) feel engagement, keep pulling till you 850 min (rpm) 850 min (rpm) feel less resistance. Then pull it quickly. ENOM00972-0 Free throttle lever (Side mount RC 8.

  • Page 43: Forward, Reverse, And Acceleration

    ENGINE OPERATION Ea c h tim e t h e m ain s wi t c h ke y is ENOM00973-0 Neutral throttle button (Top pressed in the above manner, engine mount RC type) speed changes as follows. ENOW00957-0 CAUTION Starting 850 min (rpm)
  • Page 44 ENGINE OPERATION ENOW00038-A ENOW00863-0 WARNING CAUTION Attach other end of emergency stop Idle speed may be higher during warming up switch lanyard to the operator's PFD of engine. If shifted to Forward or Reverse (Personal Flotation device) or arm and during warming up, it may be difficult to keep it attached during cruising.
  • Page 45 ENGINE OPERATION ENOF00865-A 1. Shift lever ENOF00878-0 Forward 1. Throttle grip 1. Turn the throttle grip to reduce engine speed. ENOM00900-0 Side mount RC type 2. When the engine reaches trolling (or ENOW00867-0 idling) speed, quickly pull the shift WARNING lever to the Forward position.
  • Page 46 ENGINE OPERATION Forward ENOM00975-0 Top mount RC type 1. Quickly push the control lever to the ENOW00867-0 Forward (F) position 32°, where the WARNING gear is connected, while lifting up on the neutral lock arm located under Sudden acceleration and deceleration may the control lever grip.

  • Page 47: Stopping The Engine

    ENGINE OPERATION Acceleration ENOW00867-0 WARNING Sudden acceleration and deceleration may cause passenger(s) to be thrown overboard or falling down. Open throttle grip or control lever grad- ually. ENOM00049-A 5. Stopping the engine START ENOF00880-0 PUSH TO IDLE CHANGE ENOW00868-0 1. Throttle grip 2.
  • Page 48 ENGINE OPERATION 2. Turn the main switch key to the OFF position. ENOF00938-A 2. Main switch key ENOF00871-1 1. ON 3. ON 2. START 4. START 3. OFF 5. OFF ENOW00869-0 ENOW00869-0 WARNING WARNING After stopping the engine: After stopping the engine: Close the air vent screw on the fuel tank Close the air vent screw on the fuel tank cap.

  • Page 49: Steering

    ENGINE OPERATION ENOF00891-0 ENOM00920-0 6. Steering ENOF00869-A ENOW00870-0 1. Stop switch 2. Stop switch lock WARNING Sudden steering may cause passenger(s) to be thrown overboard or falling down. Tiller handle type Right turn Move the tiller handle to the left Left turn Move the tiller handle to the right.

  • Page 50: Trim Angle

    ENGINE OPERATION 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. ENOM00052-0 Proper trim angle The position of the thrust rod is correct if the hull is horizontal during operation.

  • Page 51: Tilt Up And Down

    ENGINE OPERATION 4. Change the trim lock pin position as following picture. ENOF00053-0 ENOF01147-0 1. Snap pin 2. Thrust rod 5. Reinstall the thrust rod securely. 6. Operate the Power Tilt switch and lower the outboard. ENOM00060-A ENOF00888-0 1. Thrust rod 8.
  • Page 52 ENGINE OPERATION ENOW00056-A ENOM00066-A Tilt up WARNING 1. Move (UP) lock lever to “Free” posi- tion. When tilting up outboard motor with fuel joint for over a few minutes, be sure to dis- 2. Fully tilt up the outboard motor. connect fuel hose, or fuel may leak, poten- 3.
  • Page 53 ENGINE OPERATION ENOF00067-A ENOF00889-0 1. Tilt stopper ENOF00067-2 ENOM00069-A Power Trim & Tilt type Tilt up 1. Operate the Power Trim & Tilt switch and tilt the outboard motor up. 2. Lock the tilt with the Tilt stopper ENOF00941-0 after the outboard motor has been tilted up Tilt down 1.

  • Page 54: Shallow Water Operation

    ENGINE OPERATION ENOM00940-0 ENOM00068-A Manual relief valve 9. Shallow water operation If the battery is dead, and the power trim & tilt switch thus inoperative, open ENOW00051-0 the manual valve completely in the Man- WARNING ual direction. This will allow manual tilt- ing of the outboard motor.
  • Page 55 ENGINE OPERATION ENOM00880-A Gas assist type 1. Move (UP) lock lever to “Free” posi- tion. Tilt up outboard motor into desired shallow water running. While keeping the outboard motor in the ENOF00941-0 desired shallow water running posi- tion, move (DOWN) lock lever “Lock” position.

  • Page 56: 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. Use the hoist with allowable load is 250 kg (550 lbs) or above.

  • Page 57: Trailering

    REMOVING AND CARRYING THE OUTBOARD MOTOR Do not carry or store outboard motor in Elevate power unit 2 inches to 4 any of positions described below. inches if traveling to avoid oil spillage. Otherwise, engine damage or property damage could result from leaking oil. ENOF00072-B ENOM00072-A 3.
  • Page 58 REMOVING AND CARRYING THE OUTBOARD MOTOR 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. 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...

  • Page 59: Adjustment

    ADJUSTMENT ment screw. ENOM00073-0 1. Steering friction Tiller handle type ENOW00074-A WARNING Do not overtighten the steering friction lever it could result in difficulty of movement resulting in the loss of control causing an accident and could lead to severe injury. ENOF00911-0 1.

  • Page 60: Trim Tab Adjustment

    ADJUSTMENT Side mount type motor could lead to severe personal injury. ENOW00075-1 WARNING Inappropriate adjustment of trim tab could cause steering difficulty. After installing or readjusting trim tab, check if steering load is even. ENOF00078-2 If straight-line cruising can not be 1.

  • Page 61: 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 62: 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 63 INSPECTION AND MAINTENANCE Item Points to Check Remedy Steering • Check the operation of the steering handle. Repair Devices • Check if the anode is securely installed. Repair if necessary Other parts • Check the anode for corrosion and deformation. Replace ENOM00081-A Oil level checking...
  • Page 64 INSPECTION AND MAINTENANCE Wipe off engine oil well immediately if salt, 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 65: Fuse Replacement

    (4 in.) above the anti ventilation plate. If the fuse continues to blow, request an And be sure to remove the propeller, when authorized Tohatsu dealer to inspect starting the engine in the test tank. (See page 73) the outboard motor.
  • Page 66 INSPECTION AND MAINTENANCE 3. Remove the fuse box lid. 4. Remove the fuse and check it. If the fuse is blown, replace it with a fuse of the same specified rating. The outboard motor is supplied with spare fuses in the spare fuse holder. 1 2 3 ENOF00922-0 1.

  • Page 67: 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 number of months, whichever comes first.
  • Page 68 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 69 INSPECTION AND MAINTENANCE ENOF00923-0 ENOF00924-0 1. Drain hole 6. Tighten the oil drain screw with 1. Filler cap 2. Dipstick applying oil on the sealing surface of 3. Filler port screw. (Use new oil drain washer) Oil drain screw specified torque 24N·m (17 ft lb, 2.4 kgf ·...
  • Page 70 INSPECTION AND MAINTENANCE 2. Place a rag or towel below the oil fil- Oil volume needed for complete oil replacement ter to absorb any spilled oil. With oil filter Without oil filter replacement replacement 3. Unscrew old filter by turning the fil- 2400 mL 2200 mL ter to counter clockwise.
  • Page 71 INSPECTION AND MAINTENANCE ENOF00096-A ENOF00925-0 1. Body 1. Oil filter 2. O-ring 2. Fuel filter 3. Filter 4. O-ring ENOM00093-A 5. Float Fuel filters and fuel tank cleaning 6. Cup 7. Indication of Fuel Flow. ENOW00093-A WARNING 2. If present, disconnect hoses from the fuel connector (male) and the Gasoline and its vapors are very flammable fuel pump.
  • Page 72 INSPECTION AND MAINTENANCE 2. Clean the fuel filter and replace the 2. Remove the oil plugs (lower and gasket. upper), and completely drain the gear oil into a pan. 3. Reassemble all parts. ENOF00927-0 3. Insert the oil tube nozzle into the lower oil plug hole, and fill with gear oil by squeezing the oil tube until oil ENOF00926-1...

  • Page 73: Propeller Replacement

    INSPECTION AND MAINTENANCE 4. Install the upper oil plug, and then ENOM00086-A Propeller replacement remove oil tube nozzle and install the ENOW00084-0 lower oil plug. WARNING ENOW00095-0 CAUTION Do not begin propeller removal and installation procedure with spark plug Do not reuse oil plug gasket. Always use new c a p s a t t a c h e d , s h i f t in fo r wa r d o r gasket and tighten oil plug properly to pre- reverse, main switch at other than “OFF”,...
  • Page 74 INSPECTION AND MAINTENANCE 7. Install a new split pin into the nut hole and bend it. ENOF00084-D ENOF00084-B ENOM00087-C 2. Remove the split pin, propeller nut Spark plugs replacement and washer. ENOW00087-0 3. Remove the propeller and thrust WARNING holder. Do not reuse spark plug with damaged 4.
  • Page 75 INSPECTION AND MAINTENANCE 4. Remove the spark plugs by turning it counter-clockwise, using a 5/8" (16 mm) socket wrench and handle that is provided in tool bag. 5. Inspect the spark plug. Replace the spark plug if the electrodes are worn or if the insulators are cracked or chipped.

  • Page 76: Anode Replacement

    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 77 INSPECTION AND MAINTENANCE 1. Oil cap ENOM00089-A Power Trim & Tilt oil checking 2. Oil level Recommended oil ENOW00088-0 Use an automatic transmission fluid or WARNING equivalent. Be sure that outboard motor is secured to Recommended oils are as shown below. transom or service stand, or accidental drop or fall of outboard motor could lead ATF Dexron III...
  • Page 78 INSPECTION AND MAINTENANCE ENOM00960-0 Grease point Apply water proof grease to the parts shown below. ENOF00931-0...

  • Page 79: Off-Season Storage

    INSPECTION AND MAINTENANCE 2. Use a dry cloth to completely wipe ENOM00100-A 3. Off-season storage off water and salt from the electrical components. ENOW00934-0 3. Drain all fuel from the fuel hoses, WARNING fuel pump, fuel filter (See page 71) and vapor separator (See page 81), and Be sure to disconnect fuel connector clean these parts.

  • Page 80: Adding A Fuel Stabilizer

    INSPECTION AND MAINTENANCE 9. Stand the outboard motor up verti- cally in a dry place. ENOF00072-B ENOM00950-0 Adding a fuel stabilizer When adding a fuel stabilizer additive (commercially available), first fill the fuel tank with fresh fuel. If the fuel tank is only partially filled, air in the tank can cause the fuel to deteriorate during storage.
  • Page 81 INSPECTION AND MAINTENANCE 8. Check the drained fuel for the pres- ENOM00970-0 Fuel system draining ence of water or other contami- ENOW00028-A n a n t s. If e i t h e r is p r e s e n t , WARNING reassemble the outboard motor, refill the vapor separator with fuel,...

  • Page 82: Pre-Season Check

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

  • Page 83: Cold Weather Precautions

    INSPECTION AND MAINTENANCE rect level. 4. Consult a dealer check the outboard The oil and filter may need to be motor before operation again. changed again after running a short period to get all moisture completely out of the crankcase. 4.

  • Page 84: 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 Empty fuel tank Incorrect connection of fuel system Air entering fuel line Deformed or damaged fuel hose...
  • Page 85 TROUBLESHOOTING Possible cause Low compression Carbon deposits in the combustion chamber Incorrect valve clearance Low oil pressure/level, oil pump failure, Clogged oil filter (Pressure switch ON) Insufficient cooling water flow, clogged or defective pump Faulty thermostat Cavitations or ventilation Incorrect propeller selection Damaged or bent propeller Improper thrust rod position Unbalanced load on boat...

  • Page 86: Accessories Kit

    ACCESSORIES KIT ENOM00109-1 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 (spark plug) Socket wrench handle Screwdrivers Cross-and straight-point Screwdriver handle...

  • Page 87: 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. 40/50: 5000–6000 min (rpm) Propeller Size (Diameter × pitch x Diameter) Propeller Mark Light boats...
  • Page 88 O W N E R’ S M A N U A L MFS 40A MFS 50A 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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