TOHATSU MFS 6B Owner's Manual
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TOHATSU MFS 6B Owner's Manual

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OWNER'S
MANUAL
4B
MFS
5B
6B
OB No.003-11059-6

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Summary of Contents for TOHATSU MFS 6B

  • Page 1 OWNER’S MANUAL OB No.003-11059-6...
  • 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 PRE-OPERATING PREPARATIONS 1.Gasoline and engine oil 2.Break-in 3.Engine oil warning lamp 4.ESG ENGINE OPERATION Before starting 1.Starting 2.Warming up the engine 3.Forward and reverse 4.Stopping 5.Trim angle 6.Tilt up, tilt down and shallow water operation...
  • 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 , EP MODEL 4B(D) 5B(D) M6B(D) 5B(S) 6B(S) Item (Integral Tank) (Separate Tank) 680 (26.8) Overall Length mm (in) Overall Width mm (in) 325 (12.8) 1,073 (42.2) 1,020 (40.2) S mm (in) 1,200 (47.2) 1,147 (45.2) Overall Height S·L·UL L mm (in) UL mm (in)

  • Page 11: Names Of Parts

    NAMES OF PARTS 4B , 5B , 6B Integral fuel tank Dual fuel tank Tilt Handle Clamp Bracket Fuel Tank Top Cowl Clamp Screw Fuel Pick up Elbow Lower Motor Cover Throttle Grip Fuel Connector Cooling Water Check Port Shift Lever Air Vent Screw Tilt Lever Starter Handle...

  • Page 12: Installation

    INSTALLATION ������� 1. Mounting the outboard motor on boat Before beginning the running test, ������� check that the boat with maximum capacity loading floats on the water in a proper attitude. Check the position Most boats are rated and certified of water surface on the driveshaft in terms of their maximum allowable housing.
  • Page 13 INSTALLATION ������� To attach the outboard motor to the boat, tighten the clamp screws by Mounting outboard motor without turning their handles. following this manual can lead to unsafe Secure the outboard motor with a conditions such as poor maneuverability, rope to prevent loss overboard.

  • Page 14: Pre-Operating Preparations

    PRE-OPERATING PREPARATIONS ������ 1. Gasoline and engine oil Consult an authorized dealer for details Required Gasoline types on handling of 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 15 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 16: 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 17: Engine Oil Warning Lamp

    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, it approximately 6,250 rpm).

  • Page 18: Engine Operation

    ENGINE OPERATION Before starting Attach the fuel connector to the Before starting engine for the first time engine connector. after reassembling engine or off-season The arrow mark on the primer storage, disconnect stop switch lock b u l b s h o u l d b e f a c i n g t h e and pull the starter handle completely engine.(Separate fuel tank) out approximately 10 times in order to...
  • Page 19 ENGINE OPERATION Note S e t t h e t h ro t t l e g r i p t o s l o w position. Choke is not necessary when the engine is warm. Set the throttle grip to "RE-START"...
  • Page 20 ENGINE OPERATION If the recoil starter fails to operate Remove the top cowl and the recoil starter. Wrap a rope around the starter pulley then pull quickly to start. Use a 10 mm socket wrench as a rope handle. Hook Lever �������...

  • Page 21: 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 22: Forward And Reverse

    ENGINE OPERATION 3. Forward and reverse ������� Neutral Shift lever Reverse Foward Before shifting into forward or reverse, 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 23: Stopping

    ENGINE OPERATION ������� 4. Stopping Be sure to warm up engine well before starting cruise. Operating cold engine Stop Switch lock may cause damage to your motor. Stop switch Note Idle speed may be higher during Hook warming up of engine. If shifted to Forward or Reverse during warming up, it may be difficult to shift back to Turn the throttle grip to the slow...

  • Page 24: Trim Angle

    ENGINE OPERATION ������� 5. Trim angle Do not put hand or finger in between The trim angle of the outboard motor outboard motor body and clamp can be adjusted to suit the transom bracket when adjusting trim angle to angle of the hull, and load conditions. prevent injury in case the outboard motor body falls.

  • Page 25: Tilt Up, Tilt Down And Shallow Water Operation

    ENGINE OPERATION Note MF, EF type Stop the engine. Stop the engine before adjusting trim Shift the outboard into neutral. angle. Raise the engine to the tilt up position. Change the thrust rod position. Gentry lower the outboard. 6. Tilt up, tilt down and shallow water operation �������...

  • Page 26: Shallow Water Operation

    ENGINE OPERATION ������� Tilt up With the shift lever in Neutral or Do not put hand or finger in between F o r w a rd , f u l l y t i l t t h e m o t o r u p outboard motor body and clamp toward you by holding the tilt handle bracket when adjusting trim angle to...
  • Page 27 ENGINE OPERATION ������� Run at lowest possible speed when using shallow water drive. Tilt lock is disabled when in shallow water drive position. When driving shallow water, be careful not to strike outboard motor against sea bottom, or propeller Tilt lever may be pushed out of water, resulting in loss of control.

  • Page 28: 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 29: Trailering

    TRAILERING ������� ������� 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 30: Adjustment

    ADJUSTMENT ������� 1. Steering friction Do not overtighten the throttle grip or The steering friction can be adjusted remote control tensioner or it could result in accordance with your preference in difficulty of movement resulting in the by turning the steering adjust bolt. loss of control causing an accident and could lead to severe injury.

  • Page 31: 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 32: Daily Inspection

    INSPECTION AND MAINTENANCE 1. Daily inspection Perform the following checks before ������� and after use. Do not use outboard motor if any abnormality is found during pre-operation check or it could result in severe damage to the motor or severe personal injury. Item Points to Check Remedy...
  • Page 33 INSPECTION AND MAINTENANCE Notes Maintaining engine oil If the engine oil is low, the life of the Consult with an authorized dealer engine will be shortened significantly. if the engine oil is milky color, or appears contaminated. Checking oil level Stop the engine and set it in a vertical position.
  • Page 34 INSPECTION AND MAINTENANCE Washing outboard motor Use flushing attachment. If outboard motor is used in salt Remove propeller (refer to Propeller water, brackish water or water with a Replacement). Remove the water high acidic level, use fresh water to plug from the motor, and screw in remove salt, chemicals or mud from the flushing attachment.
  • Page 35 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 36 INSPECTION AND MAINTENANCE Attach spark plug and tighten to Replacing the spark plugs specified torque. ������� Notes Do not reuse spark plug with damaged insulation, or sparks Spark plug torque : can leak through crack, potentially 18.0Nm(13.3ft-lb)(1.84kgf-m) leading to electric shock, explosion If a torque-wrench is not available and/or fire.

  • Page 37: 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 38 INSPECTION AND MAINTENANCE Notes 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. U s e o n l y h i g h q u a l i t y 4 - s t ro k e engine oil to insure performance and prolonged engine life.
  • Page 39 INSPECTION AND MAINTENANCE ������� Cleaning the fuel filters and the fuel tank You may be injured due to high engine Fuel filters are provided inside the fuel temperatures if you fill engine oil just tank and engine. after stopping. Changing engine oil should be done after the engine has �������...
  • Page 40 INSPECTION AND MAINTENANCE Fuel filter (for fuel tank) Replacing gear oil Loosen the fuel pickup elbow shown at ������� left, remove it and clean the fuel filter. 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.

  • Page 41: Off-Season Storage

    INSPECTION AND MAINTENANCE 3. Off-season storage until oil flows out of the upper plug hole. Before you put your outboard motor in storage, it is a good opportunity to have it serviced and prepared by your Oil plug (Upper) dealer. �������...

  • Page 42: Pre-Season Check

    INSPECTION AND MAINTENANCE 4. Pre-season check Change the gear oil in the gear case. Check that the shift and throttle Apply grease to the propeller shaft. function properly. Apply grease to all sliding parts, (Be sure to turn the propeller shaft joints, nuts, and bolts.

  • Page 43: Motor Submerged In Water

    INSPECTION AND MAINTENANCE 5. Motor submerged in water 6. Cold weather precautions After taking your outboard motor out If you moor your boat in cold weather of the water, immediately take it to at temperatures below 0˚C (32˚F), your dealer. there is the danger of water freezing The following are the emergency in the cooling water pump, which may...

  • Page 44: Checking After Striking Underwater Object

    INSPECTION AND MAINTENANCE 7. Checking after striking underwater object S t r i k i n g t h e s e a b o t t o m o r a n underwater object may severely d a m a g e t h e o u t b o a r d m o t o r. Immediately bring the outboard motor to the dealer and ask for the following checks.

  • Page 45: 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 46 TROUBLESHOOTING Possible cause Spark plug other than specified Dirt, soot, etc. on spark plug No Spark or weak spark Short circuit of engine stop switch Ignition timing incorrect Lock plate not fitted Disconnection of wire or loose ground connection...
  • Page 47 TROUBLESHOOTING Possible cause Low compression Carbon deposits in the combustion chamber Incorrect valve clearance Low oil pressure/level Low oil level Use of improper oil Oil deterioration Clogged oil strainer Faulty oil pump Incorrect adjustment of throttle link Insufficient cooling water flow, clogged or defective pump Faulty thermostat Cavitation or ventilation Incorrect propeller selection...

  • Page 48: 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 1,000 mm...

  • Page 49: Optional Accessories

    OPTIONAL ACCESSORIES Touch-up paint (300ml) Fuel Tank & Primer Bulb Ass’ y (12L) Genuine engine oil (450ml) Propeller Flushing attachment Remoto control box Various kinds of fitting parts are available. Please consult with your dealer. Genuine grease (250g) Genuine gear oil (500ml) Vertical starter...

  • Page 50: 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. 4 : 4,500 to 5,500 rpm 5 : 4,500 to 5,500 rpm 6 : 5,000 to 6,000 rpm Propeller Size (Diameter pitch)
  • Page 52 FAX : TOKYO (03)3966-2951 E-mail : www.tohatsu.co.jp 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 permission of Tohatsu Corporation.

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