TOHATSU MFS 20C Owner's Manual
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TOHATSU MFS 20C Owner's Manual

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OWNER'S
MANUAL
MFS
9.9C
15C
20C
OB No.003-11090-2

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Summary of Contents for TOHATSU MFS 20C

  • Page 1 OWNER’S MANUAL 9.9C OB No.003-11090-2...
  • Page 2 INJURY OR DEATH. KEEP THIS MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE. Copyright © 2009 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...
  • Page 3 IF THIS PROCEDURE IS NOT FOLLOWED, YOUR OUTBOARD MOTOR WILL NOT BE COVERED BY THE APPLICABLE LIMITED WARRANTY. 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 GENERAL SAFETY INFORMATION SPECIFICATIONS NAMES OF PARTS INSTALLATION 1. Mounting the outboard motor on boat 2. Installing the remote control devices 3. Installing the battery PRE-OPERATING PREPARATIONS 1.Gasoline and engine oil 2.Break-in 3.Engine warning system 4.ESG ENGINE OPERATION Before starting 1.Starting 2.Warming up the engine 3.Forward and reverse...
  • Page 7 INDEX GENERAL SAFETY INFORMATION 1. SPECIFICATIONS 2. NAMES OF PARTS 3. INSTALLATION 4.PRE-OPERATING PREPARATIONS 5.ENGINE OPERATION 6.REMOVING AND CARRYING THE MOTOR 7.TRAILERING 8.ADJUSTMENT 9.INSPECTION AND MAINTENANCE 10.TROUBLESHOOTING 11.TOOL KIT AND SPARE PARTS 12.OPTIONAL ACCESSORIES 13.PROPELLER TABLE...

  • Page 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 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

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

  • Page 12: Names Of Parts

    NAMES OF PARTS MF , EF , EP , EFT , EPT MF, EF and EFT type only. EF and EFT type only. Tilt Handle Sub Water Inlet Starter Handle Top Cowl Water Inlet Stop Switch Bottom Cowl Propeller Warning Lamp Cooling Water Check Port Drive Shaft Housing Fuel Connector...
  • Page 13 NAME OF PARTS Power Tilt Type EP and EPT type only EFT type only Primer Bulb Power Tilt Power Tilt Switch Fuel Tank Cap (EPT type only) Air Vent Screw Remote Control Box Fuel Connector Main Switch Fuel Pick up Elbow Stop Switch Fuel Tank Cord Assembly...

  • Page 14: Installation

    INSTALLATION 1. Mounting the outboard motor on boat MF, EF, EP type To attach the outboard motor to the boat, tighten the clamp screws by ������� turning their handles. Also, tighten the bolts. Secure Most boats are rated and certified in terms of their maximum allowable the outboard motor with a rope to horsepower, as shown on the boat’s...
  • Page 15 INSTALLATION Notes EFT, EPT type 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. 2. Be sure to tighten mounting bolt nuts to the specified torque. (30 Nm(3.0kgf)13ft·lb) �������...

  • Page 16: Installing The Remote Control Devices

    INSTALLATION 2. Installing the remote control devices Fitting of Remote Control Cable to Engine. It is recommended that you consult with your authorized dealer for installation Note and adjustment of the remote control Put the control lever in the Neutral device.

  • Page 17: Installing The Battery

    INSTALLATION 3. Installing the battery Note Confirm whether the shift of engine P l a c e t h e b a t t e r y b o x i n a is in gear when shifting the control convenient position away from lever of the Remote Control to its first possible water spray.
  • Page 18 INSTALLATION ������� 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 19: Pre-Operating Preparations

    PRE-OPERATING PREPARATIONS 1. Gasoline and engine oil ������ Consult an authorized dealer for details Required Gasoline types on handling gasoline, if necessary. UNITED STATES AND CANADA: Gasoline and its vapors are very flammable and can be explosive. Use a major brand of automotive unleaded gasoline with a minimum When carrying a fuel tank containing posted octane rating of 87.
  • Page 20 PRE-OPERATING PREPARATIONS Note Engine Oil U s e o n l y h i g h q u a l i t y 4 - s t r o k e Use of engine oils that do not meet engine oil to insure performance and these requirements will result in prolonged engine life.

  • Page 21: Break-In

    PRE-OPERATING PREPARATIONS 2. Break-in Your new outboard motor and lower ������� 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 22: Engine Warning System

    PRE-OPERATING PREPARATIONS 3. Engine oil warning lamp 4. 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 23: Engine Operation

    ENGINE OPERATION Before starting Attach the fuel connector to the engine connector. Before starting engine for the first time The arrow mark on the primer bulb after reassembling engine or off-season should be facing the engine. storage, disconnect stop switch lock and pull the starter handle completely out approximately 10 times in order to Fuel...
  • Page 24 ENGINE OPERATION MF, EF, EFT type Place the shift lever in the Neutral Set the throttle grip to "START" position. position. Be sure that the shift is in Neutral when starting the engine. This model is provided with start in gear protection.
  • Page 25 ENGINE OPERATION MF type EP, EPT type Engine is equipped with a compression Insert the main switch key. release mechanism. Set the control lever in the Neutral Pull the starter handle slowly until position. you feel engagement, keep pulling Raise the free accel lever a little till you feel less resistance.
  • Page 26 ENGINE OPERATION ������� ������� Do not keep turning starter motor for Be careful that your clothes or other over 5 seconds, or the battery may items do not get caught in the rotating be consumed, potentially making the engine parts. engine starting impossible and/or To prevent accident and injury, do not damaging the starter.
  • Page 27 ENGINE OPERATION If the choke solenoid fails to operate (EP and EPT type only) Remove the top cowl. Close the choke plate by finger. Raise the Free accel lever a little. Turn the main switch key to start position. Stop pushing the key when the engine has started.

  • Page 28: Warming Up The Engine

    ENGINE OPERATION 2. Warming up the engine Engine speeds 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 29: Forward And Reverse

    ENGINE OPERATION 3. Forward and reverse Note Do not increase engine speed ������� 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 30 ENGINE OPERATION ������� Forward Quickly push the control lever to the Be sure to warm up engine well before Forward (F) position 32˚, where the 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 31: Stopping

    ENGINE OPERATION 4. Stopping EP, EPT type MF, EF, EFT type START Stop Switch Stop switch Lock Stop switch lock Turn the throttle grip to the slow position. 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 32: Trim Angle

    ENGINE OPERATION 5. 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 33 ENGINE OPERATION EFT, EPT type Improper Trim Angle Proper Trim Angle The trim angle is optimum when the boat is (bow rises too high) If the trim angle is excessive, the parallel to the water surface while running. bow will rise out of the water and the speed will decrease.

  • Page 34: Tilt Up, Tilt Down And Shallow Water Operation

    ENGINE OPERATION ������� 6. Tilt up, tilt down and shallow water operation Do not put hand or finger in between MF, EF, EP type outboard motor body and clamp bracket when adjusting trim angle to ������� prevent injury in case the outboard motor body falls.
  • Page 35 ENGINE OPERATION Return to normal running position: Shallow water operation Put the reverse lock lever in the tilt ������� 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 36 ENGINE OPERATION ������� EFT, EPT type Operate the Power Trim & Tilt switch Do not tilt up outboard motor while and tilt the outboard motor up. (The engine operates, or no cooling water Main Switch must be "ON".) may be fed, leading to engine seizure due to overheating.
  • Page 37 ENGINE OPERATION ������� EFT, EPT type The provided Power tilt makes tilt- The Power Trim & Tilt can be set to 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 any trim angle, however, avoid cruising used as a power trim and tilt when with the engine tilted in the tilt range.

  • Page 38: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR 1. Removing the outboard motor 3. Storing the outboard motor Stop the engine. Outboard motor should be stored in a Disconnect the fuel connector, vertical position. the remote control cables and the battery cords from the outboard Note motor.

  • Page 39: Trailering

    TRAILERING ������� ������� Do not go under outboard motor tilted The tilt support device supplied on up even if it is supported by support your outboard motor is not intended bar, or accidental fall of outboard motor for towing. It is intended to support could lead to severe personal injury.

  • Page 40: 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 41: Trim Tab Adjustment

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

  • Page 42: 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 43: Daily Inspection

    INSPECTION AND MAINTENANCE 1. Daily Inspection Perform the following checks before ������� 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 44 INSPECTION AND MAINTENANCE Maintaining engine oil If the engine oil is low, the life of the Notes engine will be shortened significantly. Consult with an authorized dealer if the engine oil is milky color, or Checking oil level appears contaminated. Stop the engine and set it in a vertical position.
  • Page 45 INSPECTION AND MAINTENANCE Washing outboard motor If outboard motor is used in salt Use flushing attachment. water, brackish water or water with a Remove propeller (refer to Propeller high acidic level, use fresh water to Replacement). Remove the water remove salt, chemicals or mud from plug from the outboard motor, and exterior and cooling water passage screw in the flushing attachment.
  • Page 46 INSPECTION AND MAINTENANCE ������� Replacing the propeller A worn-out or bent propeller will lower Do not hold propeller with hand(s) the motor's performance, and cause when loosening or tightening propeller engine trouble. nut. Put a piece of wood block between Before removing the propeller, remove propeller blade and anti-ventilation plate to hold propeller.
  • Page 47 INSPECTION AND MAINTENANCE Replacing the spark plugs Stop the engine. Remove the top cowl. ������� Remove the spark plug caps. Remove the spark plugs by turning Do not reuse spark plug with damaged insulation, or sparks it counter-clockwise, using a 5/8" can leak through crack, potentially socket wrench and handle.
  • Page 48 INSPECTION AND MAINTENANCE Replacing the anode Checking and Refilling Oil in the The anode protects the outboard Power Trim & Tilt. 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 Check the oil level of the reservoir (metal corrosion caused by feeble tank as shown on the right while...
  • Page 49 INSPECTION AND MAINTENANCE ������� 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 50: Periodic Inspection

    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 51 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 r o k e will dramatically shorten the life of the engine oil to insure performance and...
  • Page 52 INSPECTION AND MAINTENANCE ������� Replacing oil filter Drain oil from the engine. You may be injured due to high engine Place a rag or towel below the oil temperatures if you fill engine oil just filter to absorb any spilled oil. after stopping.
  • Page 53 INSPECTION AND MAINTENANCE Cleaning the fuel filters and the Fuel tank filter Loosen the fuel pickup elbow shown at fuel tank Fuel filters are provided inside the fuel left, remove it and clean the fuel filter. tank and engine. ������� Gasoline and its vapors are very flammable and can be explosive.
  • Page 54 INSPECTION AND MAINTENANCE Replacing gear oil Oil plug (Upper) ������� 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 55: Off-Season Storage

    INSPECTION AND MAINTENANCE 3. Off-season storage Change the engine oil. Change the gear oil in the gear Before you put your outboard motor case. in storage, it is a good opportunity to Apply grease to the propeller shaft. have it serviced and prepared by your Apply grease to all sliding parts, dealer.

  • Page 56: Pre-Season Check

    INSPECTION AND MAINTENANCE 4. Pre-season check 5. Motor submerged in water 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. when checking the shift function The following are the emergency or else the shift linkage may be...

  • Page 57: 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 58: 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 Incorrect connection of fuel system Air entering fuel line Deformed or damaged fuel hose Closed air vent on fuel tank...
  • Page 59 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 Ignition timing incorrect Lock plate not fitted Disconnection of wire or loose ground connection Blown 20 Amp fuse in the starting circuit Not shifted into neutral position Weak battery or battery connections are loose or corroded Ignition key switch failure...
  • Page 60 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 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 61: 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 Socket wrench 13 mm Socket wrench 16 mm Service tools Socket wrench handle Screwdrivers Cross-and straight-point Screwdriver handle Starter rope 1,600 mm...

  • Page 62: Optional Accessories

    OPTIONAL ACCESSORIES Flushing attachment Tachometer Selector Genuine grease (250g) Genuine gear oil (500ml) Touch-up paint (300ml) Propeller...

  • Page 63: 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 diameter pitch) Propeller Mark...
  • Page 64 M E M O...
  • Page 65 M E M O...
  • Page 66 M E M O...
  • Page 68 OWNER’S MANUAL 9.9C TOHATSU CORPORATION Address : 5-4, 3-chome, Azusawa, Itabashi-ku, TOKYO, 174-0051 JAPAN Phone : TOKYO (03)3966-3117 FAX : TOKYO (03)3966-2951 E-mail : www.tohatsu.co.jp 003-11090-2 0912NB Printed in Japan...

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