TOHATSU MFS 15C Owner's Manual
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TOHATSU MFS 15C Owner's Manual

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OWNER'S
MANUAL
MFS
15C
20C
OB No.003-11090-5

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Summary of Contents for TOHATSU MFS 15C

  • Page 1 OWNER’S MANUAL OB No.003-11090-5...
  • Page 2 INJURY OR DEATH. KEEP THIS MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2009-2012 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...
  • Page 3 WILL NOT BE COVERED BY THE APPLICABLE LIMITED WARRANTY, IF THIS PROCEDURE IS NOT FOLLOWED. PRE-DELIVERY CHECK Be sure that the product has been checked by an authorized TOHATSU dealer before you take delivery. Limited Warranty Please refer to the TOHATSU outboard motor Limited warranty provided to you with this product, the terms and conditions of which, as amended from time to time, are incorporated by reference into the manual.
  • Page 4 Serial Number : 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 procedures described later in this manual should be followed carefully.

  • Page 5: Table Of Contents

    CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 GENERAL SAFETY INFORMATION .
  • Page 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 INSPECTION AND MAINTENANCE .
  • Page 7 INDEX GENERAL SAFETY INFORMATION 1. SPECIFICATIONS 2. NAMES OF PARTS 3. LOCATIONS OF WARNING LABELS 4. INSTALLATION 5. PRE-OPERATING PREPARATIONS 6. ENGINE OPERATION 7. REMOVING AND CARRYING THE OUTBOARD MOTOR 8. TRAILERING 9. ADJUSTMENT 10. INSPECTION AND MAINTENANCE 11. TROUBLESHOOTING 12.

  • Page 8: General Safety Information

    8 GENERAL SAFETY INFORMATION GENERAL SAFETY INFORMATION 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 "DANGER,"...
  • Page 9 GENERAL SAFETY INFORMATION 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 10: Specifications

    10 SPECIFICATIONS SPECIFICATIONS MF , EF , EFT MODEL 15C MF 15C EF 15C EFT Item 20C MF 20C EF 20C EFT Overall Length mm (in) 980 (38.6) Overall Width mm (in) 365 (14.4) 1,065 (41.9) · 1,215 (47.8) · 1,342 (52.8) Overall Height S·L·UL mm (in) 413 (16.3) ·...
  • Page 11 SPECIFICATIONS EP , EPT MODEL 15C EP 15C EPT Item 20C EP 20C EPT 640 (25.2) Overall Length mm (in) Overall Width mm (in) 345 (13.6) 1,065 (41.9) · 1,215 (47.8) · 1,342 (52.8) Overall Height S·L·UL mm (in) 413 (16.3) · 562 (22.1) · 689 (27.1) Transom Height S·L·UL mm (in) 54.0 (119)

  • Page 12: Names Of Parts

    12 NAMES OF PARTS NAMES OF PARTS MF , EF , EP , EFT , EPT ＊：MF, EF and EFT type only. ☆：EF and EFT type only. ① ⑨ ○ Tilt Handle Sub Water Inlet Starter Handle ② ⑩ ○ Top Cowl Water Inlet Stop Switch...
  • Page 13 NAMES OF PARTS Power Tilt Type EP and EPT type only EFT type only ○ ○ ○ Primer Bulb Clamp Screw Power Tilt Switch ○ Fuel Tank Cap (EFT type only) (EPT type only) ○ ○ ○ Air Vent Screw Power Tilt Remote Control Box ○...

  • Page 14: Locations Of Warning Labels

    14 LOCATIONS OF WARNING LABELS LOCATIONS OF WARNING LABELS Locations of warning labels Warning label regarding owner's manual, top cowl, engine stop switch, engine oil level and unleaded gasoline Warning label on posi- tion of outboard motor when setting down Warning label on engine stop switch CAUTI O N...

  • Page 15: Installation

    INSTALLATION INSTALLATION MF, EF, EP type 1. Mounting the outboard motor on boat ① To attach the outboard motor to the boat, tighten the clamp screws by WARNING turning their handles. Also, tighten the bolts. Secure Most boats are rated and certified the outboard motor with a rope to in terms of their maximum allowable horsepower, as shown on the boat’s...

  • Page 16: Eft/Ept Type

    16 INSTALLATION EFT, EPT type Notes ② Power Tilt and Gas Assist type 1. Apply sealing agent such as silicone sealed between the bolts and transom board holes before tightening the bolts. Clamp Screw 2. Be sure to tighten mounting bolt (EFT type only) nuts to the specified torque.

  • Page 17: Installing The Remote Control Devices

    Lock nut 2. Installing the remote control devices Cable joint Remote control cable WARNING When using other than Tohatsu's genuine remote control box, DO NOT select the one without neutral safety switch that Approx. 10mm prevents in-gear start. (0.39 inch)

  • Page 18: Installing The Battery

    18 INSTALLATION 3. Installing the battery Note ① P l a c e t h e b a t t e r y b o x i n a Confirm whether the shift of engine is in gear when shifting the control convenient position away from lever of the Remote Control to its first possible water spray.
  • Page 19 INSTALLATION CAUTION Note Minimum recommended battery : 12V, Do not use a battery that is not 70AH (800 Marine Cranking Amps recommended. Use of a battery (MCA) or 650 Cold Cranking Amps not recommended can lead to poor (CCA)) performance of, and/or damage to, the Specifications and features of batteries electrical system.

  • Page 20: Pre-Operating Preparations

    ● Wipe off gasoline well immediately if spilt. GASOLINES CONTAINING ALCOHOL The fuel system components on your After cleaning gasoline tank: TOHATSU engine will withstand up to ● Wipe off gasoline well immediately if 10% alcohol content in the gasoline. spilt. ● If the fuel tank is disassembled But if the gasoline in your area contains for cleaning, reassemble carefully.

  • Page 21: Low Permeation Fuel Hose Requirement

    S tarting and operating difficulties ● CAUTION WARNING When operating a TOHATSU engine on Fuel leakage can cause fire or explosion, gasoline containing alcohol, storage of potentially leading to severe injury or gasoline in the fuel tank for long periods loss of life.

  • Page 22: Epa Pressurized Portable Fuel Tank Requirements

    The fuel tank has a manual vent AND CANADA MODEL screw which should be closed for transportation and full open for TOHATSU adopts Primer bulb/hose operation and cap removal. assembly approved by the Environ- ment Protection Agency (EPA). Since sealed fuel tanks are not openly...

  • Page 23: Recommended Engine Oil

    PRE-OPERATING PREPARATIONS 5. Recommended engine oil CAUTION U s e o n l y h i g h q u a l i t y 4 - s t ro k e Be sure to use EPA approved tank engine oil to insure performance and and EPA approved primer bulb/hose prolonged engine life.

  • Page 24: Break-In

    24 PRE-OPERATING PREPARATIONS 6. Break-in Your new outboard motor and lower CAUTION unit require break-in for the moving c o m p o n e n t s a c c o r d i n g t o t h e Operating the outboard motor without conditions described in the following break-in can shorten service life of the...

  • Page 25: Engine Oil Warning Lamp

    PRE-OPERATING PREPARATIONS 7. Engine oil warning lamp 8. ESG (A device preventing over revolution) Oil pressure is required to lubricate ESG is a device to prevent over internal engine parts. revolution of the engine (more than When the warning lamp (Red) is off, approximately 6,400 rpm).

  • Page 26: Engine Operation

    26 ENGINE OPERATION ENGINE OPERATION 1. Filling the fuel Before starting DANGER CAUTION Consult an authorized dealer for details The engine oil is drained for shipping on handling gasoline, if necessary. from the factory. Be sure to fill the engine to the proper level before starting Gasoline and its vapors are very engine.
  • Page 27 ENGINE OPERATION For USA and Canada model WARNING ① F ull open the air vent screw on When opening fuel tank cap, be sure to the tank cap and release internal follow the procedure described below. pressure. Fuel could blast out through the fuel Full open tank cap in case the cap is loosened by Air vent screw...

  • Page 28: Feeding The Fuel

    28 ENGINE OPERATION For USA and Canada model 2. Feeding the fuel ① F ull open the air vent screw on the Except for USA and Canada model tank cap. ① F ull open the air vent screw on the ②...

  • Page 29: Starting

    ENGINE OPERATION 3. Starting CAUTION ① A fter making sure the stop switch When using EPA approval fuel tank, lock has been installed, connect only use a primer bulb/hose assembly the hook to a part of the operator's that has a Fuel Demand Valve installed in the fuel hose or a sealing mechanism body.
  • Page 30 30 ENGINE OPERATION CAUTION Note If the engine starts in gear, do not use Choke is not necessary when the it. Contact an authorized dealer. engine is warm. Set the throttle grip to "RE-START" position. Note Note Start-in-gear protection prevents engine from starting at other than If engine does not start with 4 or 5 neutral shift.
  • Page 31 ENGINE OPERATION Slowly Quickly Note Choke operation is not necessary if the engine is warm. ⑥ S top pushing the key when the engine has started. The key returns to the original position, automatically. ⑦ R eturns the Free accel lever to close position.
  • Page 32 32 ENGINE OPERATION If the recoil starter fails to operate WARNING ◎ Remove the top cowl and the recoil starter. Wrap a rope around the ● Be sure that no bystander(s) is within 2 meters from back of starting starter pulley then pull quickly to operator.
  • Page 33 ENGINE OPERATION...

  • Page 34: Warming Up The Engine

    34 ENGINE OPERATION Engine speeds 4. Warming up the engine Idling speed after warming up. War m the engine at low engine Remark: In case of cold engine speeds for about three minutes. This starting, idling speed is increased allows the lubricating oil to circulate to about 300 rpm for several minutes.

  • Page 35: Forward And Reverse

    ENGINE OPERATION 5. Forward and reverse Note Do not increase engine speed WARNING unnecessarily in reverse. Before shifting into forward or reverse, MF/EF and EFT type make sure that boat is properly moored and outboard motor can be steered fully to the right and left. Make sure that no swimmer(s) is ahead or astern of the boat.
  • Page 36 36 ENGINE OPERATION ■ Forward CAUTION Quickly push the control lever to the Forward (F) position 32˚, where the Be sure to warm up engine well before starting cruise. Operating cold engine gear is connected, while lifting up on may cause damage to your motor. the lock button located at the bottom of the control lever grip.

  • Page 37: Stopping

    ENGINE OPERATION EP, EPT type 6. Stopping MF, EF, EFT type START Stop Switch Stop switch Lock Stop switch lock ① Turn the throttle grip to the slow position. ② Put the shift lever in the Neutral position. Run the engine for 2-3 minutes at idling speed if it has been running at full speed.

  • Page 38: Trim Angle

    38 ENGINE OPERATION 7. Trim angle The trim angle of the outboard motor can be adjusted to suit the transom angle of the hull, and load conditions. Choose an appropriate trim angle that will allow the anti-ventilation plate to run parallel to the water surface during operation.
  • Page 39 ENGINE OPERATION ■ Proper Trim Angle EFT, EPT type ■ Improper Trim Angle The trim angle is optimum when the boat is parallel to the water surface while running. (bow rises too high) If the trim angle is excessive, the bow will rise out of the water and the EFT type speed will decrease.

  • Page 40: Tilt Up, Tilt Down And Shallow Water Operation

    40 ENGINE OPERATION WARNING 8. Tilt up, tilt down and shallow water operation MF, EF, EP type ● Do not put hand or finger in between outboard motor body and clamp WARNING bracket when adjusting trim angle to prevent injury in case the outboard When tilting up or down, be careful not motor body falls.
  • Page 41 ENGINE OPERATION ■ Shallow water operation ② Return to normal running position: Put the reverse lock lever in the tilt WARNING down position, slightly lift up the outboard motor, and then put it During shallow water operation, be down. careful not to place your hand between Reverse lock lever the swivel bracket and the stern bracket.
  • Page 42 42 ENGINE OPERATION EFT, EPT type CAUTION ① Operate the Power Trim & Tilt switch and tilt the outboard motor up. Do not tilt up outboard motor while engine operates, or no cooling water may be fed, leading to engine seizure due to overheating.
  • Page 43 ENGINE OPERATION EFT, EPT type CAUTION The provided Power tilt makes tilt- u p / d o w n e l e c t r i c a l l y. I t m a y b e The Power Trim & Tilt can be set to used as a power trim and tilt when any trim angle, however, avoid cruising with the engine tilted in the tilt range.

  • Page 44: Removing And Carrying The Outboard Motor

    44 REMOVING AND CARRYING THE OUTBOARD MOTOR REMOVING AND CARRYING THE OUTBOARD MOTOR WARNING 1. Removing the outboard motor ① Stop the engine. ● Close air vent screw of fuel tank and ② Disconnect the fuel connector, fuel cock before carrying or storing outboard motor and fuel tank, or fuel the remote control cables and the may leak, potentially catching fire.

  • Page 45: Trailering

    TRAILERING TRAILERING WARNING CAUTION Do not go under outboard motor tilted When trailering the outboard motor up even if it is supported by support should be in a vertical (normal running) bar, or accidental fall of outboard motor position, fully down. Trailering in the could lead to severe personal injury.

  • Page 46: Adjustment

    46 ADJUSTMENT ADJUSTMENT 1. Steering friction 2. Throttle grip Adjust this lever to achieve the Friction adjustment of the throttle desired steering friction (drag) on grip can be made with the throttle the tiller handle. Move lever towards adjustment screw. (a) to tighten friction and move lever towards (b) to loosen friction.

  • Page 47: Trim Tab Adjustment

    ADJUSTMENT WARNING 4. Trim Tab Adjustment If straight-line cruising can not be ● Be sure that outboard motor is achieved, adjust the trim tab located secured to transom or service stand, or accidental drop or fall of under the anti-ventilation plate. outboard motor could lead to severe ◎...

  • Page 48: Inspection And Maintenance

    48 INSPECTION AND MAINTENANCE INSPECTION AND MAINTENANCE Care of your outboard motor EPA Emissions Regulations To keep your outboard motor in the EPA (United States Environmental best operating condition, it is very Protection Agency) has emission important that you perform daily and regulations regulating air pollution periodic maintenance as suggested from new outboard motors.

  • Page 49: Daily Inspection

    INSPECTION AND MAINTENANCE 1. Daily Inspection Perform the following checks before WARNING and after use. Do not use outboard motor on which any abnormality is found during pre-operation check, or it could go into trouble during cruising potentially leading to accident. Item Points to Check Remedy...
  • Page 50 50 INSPECTION AND MAINTENANCE Maintaining engine oil Notes If the engine oil is low, the life of the engine will be shortened significantly. Consult with an authorized dealer if the engine oil is milky color, or appears contaminated. ■ Checking oil level ①...
  • Page 51 INSPECTION AND MAINTENANCE ■ Use flushing attachment. Washing outboard motor ① Remove propeller (refer to Propeller If outboard motor is used in salt water, brackish water or water with a Replacement). Remove the water high acidic level, use fresh water to plug from the outboard motor, and remove salt, chemicals or mud from screw in the flushing attachment.
  • Page 52 52 INSPECTION AND MAINTENANCE Replacing the propeller WARNING A worn-out or bent propeller will lower the motor's performance, and cause Do not hold propeller with hand(s) engine trouble. when loosening or tightening propeller nut. Put a piece of wood block between Before removing the propeller, remove propeller blade and anti-ventilation the spark plug caps from the spark...
  • Page 53 INSPECTION AND MAINTENANCE ① Stop the engine. Replacing the spark plugs ② Remove the top cowl. WARNING ③ Remove the spark plug caps. ④ Remove the spark plugs by turning Do not reuse spark plug with damaged it counter-clockwise, using a 5/8" insulation, or sparks can leak socket wrench and handle.
  • Page 54 54 INSPECTION AND MAINTENANCE Replacing the anode Checking and Refilling Oil in the The anode protects the outboard Power Trim & Tilt. ① Check the oil level of the reservoir m o t o r f r o m g a l v a n i c c o r r o s i o n (metal corrosion caused by feeble tank as shown on the right while electoricity).
  • Page 55 INSPECTION AND MAINTENANCE CAUTION Do not unscrew the oil plug with the outboard motor tilted down. Pressurized oil in the oil tank may spurt out. Recommended oil Use an automatic transmission fluid or equivalent. Recommended oils are as shown below. ATF Dexron III Air purging from the Power Trim and Tilt unit.

  • Page 56: Periodic Inspection

    56 INSPECTION AND MAINTENANCE 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 57 INSPECTION AND MAINTENANCE Notes Drain hole Your outboard motor should receive careful, and complete inspection at 300 hours. This is the best time for major maintenance procedures to be carried out. Replacing engine oil Engine oil mixed with dust or water U s e o n l y h i g h q u a l i t y 4 - s t ro k e will dramatically shorten the life of the engine oil to insure performance and...
  • Page 58 58 INSPECTION AND MAINTENANCE Replacing oil filter CAUTION ① Drain oil from the engine. ② Place a rag or towel below the oil You may be injured due to high engine temperatures if you fill engine oil just filter to absorb any spilled oil. after stopping.
  • Page 59 INSPECTION AND MAINTENANCE ■ Fuel tank filter Cleaning the fuel filters and the fuel tank Loosen the fuel pickup elbow shown at Fuel filters are provided inside the fuel left, remove it and clean the fuel filter. tank and engine. WARNING Gasoline and its vapors are very flammable and can be explosive.
  • Page 60 60 INSPECTION AND MAINTENANCE Replacing gear oil Oil plug (Upper) WARNING ● 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. ● Be sure to lock outboard motor if it is tilted up, or accidental fall of outboard motor could lead to severe personal injury.

  • Page 61: Off-Season Storage

    INSPECTION AND MAINTENANCE ⑤ Change the engine oil. 3. Off-season storage ⑥ Change the gear oil in the gear Before you put your outboard motor case. ⑦ Apply grease to the propeller shaft. in storage, it is a good opportunity to ⑧...

  • Page 62: Pre-Season Check

    62 INSPECTION AND MAINTENANCE 4. Pre-season check 5. Motor submerged in water ① Check that the shift and throttle After taking your outboard motor out function properly. of the water, immediately take it to (Be sure to turn the propeller shaft your dealer.

  • Page 63: Cold Weather Precautions

    INSPECTION AND MAINTENANCE 6. Cold weather precautions 7. Checking after striking underwater object If you moor your boat in cold weather S t r i k i n g t h e s e a b o t t o m o r a n at temperatures below 0˚C (32˚F), underwater object may severely there is the danger of water freezing...

  • Page 64: Troubleshooting

    64 TROUBLESHOOTING TROUBLESHOOTING 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 ●...
  • Page 65 TROUBLESHOOTING Possible cause ● ● ● ● ● ● Spark plug other than specified ● ● ● ● ● Dirt, soot, etc. on spark plug ● ● ● ● ● No Spark or weak spark ● Short circuit of engine etop switch ●...
  • Page 66 66 TROUBLESHOOTING Possible cause ● ● ● ● ● Low compression ● Carbon deposits in the combustion chamber ● ● Incorrect valve clearance Low oil pressure/level ● ● ● ● Incorrect adjustment of throttle link ● Insufficient cooling water flow, clogged or defective pump ●...

  • Page 67: Tool Kit And Spare Parts

    TOOL KIT AND SPARE PARTS TOOL KIT AND SPARE PARTS The following a list of the tools and spare parts provided with the motor. Items Quantity Remark Tool bag Pliers 10 × 13 mm Socket wrench Socket wrench 16 mm Service tools Socket wrench handle Screwdrivers...

  • Page 68: Optional Accessories

    68 OPTIONAL ACCESSORIES OPTIONAL ACCESSORIES Flushing attachment Tachometer Selector Genuine gear oil (500ml) Touch-up paint (300ml) Propeller Genuine engine oil (450ml,1L)

  • Page 69: Propeller Table

    PROPELLER TABLE PROPELLER TABLE 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. 15: 5,000 to 6,000 rpm 20: 5,400 to 6,100 rpm Propeller Size (Blades ×...
  • Page 70 M E M O M E M O M E M O...
  • Page 72 OWNER’S MANUAL TOHATSU CORPORATION Address : 5-4, 3-chome, Azusawa, Itabashi-ku, TOKYO, 174-0051 JAPAN Phone : TOKYO (03)3966-3117 FAX : TOKYO (03)3966-2951 URL : www.tohatsu.co.jp 003-11090-5 1105NB Printed in Japan...

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