1. Manuals
  2. Brands
  3. TOHATSU Manuals
  4. Outboard Motor
  5. MFS 8A3
  6. Owner's manual

TOHATSU MFS 6A3Z Owner's Manual

Tohatsu outboards
Hide thumbs Also See for MFS 6A3Z:
Table of Contents

Advertisement

Quick Links

OWNER'S
MANUAL
MFS
6A3Z
8A3
9.8A3
OB No.003-11082-6

Advertisement

Table of Contents
loading

Related Manuals for TOHATSU MFS 6A3Z

Summary of Contents for TOHATSU MFS 6A3Z

  • Page 1 OWNER’S MANUAL 6A3Z 9.8A3 OB No.003-11082-6...
  • 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 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 ■ 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 ･...
  • 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 OUTBOARD 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 6A3Z (Available in specific region) MODEL Item 975 (38.4) 590 (23.2) Overall Length mm (in) Overall Width mm (in) 354 (13.9) 320 (12.6) 1,035 (40.7) · 1,162 (45.7) · 1,289 (50.7) Overall Height S·L·UL mm (in) 435 (17.1) · 562 (22.1) · 689 (27.1) Transom Height S·L·UL mm (in) S Kg (lb)
  • Page 11 8A3, 9.8A3 9.8A3 MODEL Item 975 (38.4) 590 (23.2) Overall Length mm (in) Overall Width mm (in) 354 (13.9) 320 (12.6) 1,035 (40.7) · 1,162 (45.7) · 1,289 (50.7) Overall Height S·L·UL mm (in) 435 (17.1) · 562 (22.1) · 689 (27.1) Transom Height S·L·UL mm (in) S Kg (lb)
  • Page 12 SPECIFICATIONS 8A3, 9.8A3 9.8A3 MODEL Item Overall Length mm (in) 975 (38.4) 590 (23.2) 354 (13.9) 320 (12.6) Overall Width mm (in) 1,035 (40.7) · 1,162 (45.7) · 1,289 (50.7) Overall Height S·L·UL mm (in) 435 (17.1) · 562 (22.1) · 689 (27.1) Transom Height S·L·UL mm (in) 46.5 (102.5)

  • Page 13: Names Of Parts

    NAMES OF PARTS MF , EF , EP ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ EP type only ○ ○ ○ ○...
  • Page 14 NAME OF PARTS EFT , EPT ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ EPT type only ○ ○ ○ ○ ○...

  • Page 15: Installation

    INSTALLATION CAUTION 1. Mounting the outboard motor on boat ● Before beginning the running test, WARNING 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 16 INSTALLATION Note MF, EF, EP type ① To attach the outboard motor to the It is recommended to install upper boat, tighten the clamp screws by mounting bolts with bolt head at turning their handles. inside surface of transom. Bolts with Also, tighten the bolts.

  • Page 17: Eft/Ept Type

    INSTALLATION EFT, EPT type (Power tilt model) Note It is recommended to install upper mounting bolts with bolt head at inside surface of transom. Bolts with threaded end at inside surface of transom can cause personal injury. Notes 1. Apply sealing agent such as silicone sealed between the bolts and transom board holes before tightening the bolts.

  • Page 18: Installing The Remote Control Devices

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

  • Page 19: Connecting The Cord Assembly

    INSTALLATION WARNING ③ Connecting the Cord assembly (Wiring Harness) Do not disconnect cord ass'y when engine is in operation, or engine will go Pass the Cord assembly from the out of control. Remote control box through the hole in the Lower motor cover and cover the wire ends with the Sleeve (provided in a tool bag) and then c o n n e c t t h e e l e c t r i c t e r m i n a l s...

  • Page 20: Ept Model

    INSTALLATION EPT model Green Blue Blue Green Brown Blue Black Brown Yellow Brown Black Pink Sky blue Black Brown ② Connect the positive cord (+) to the CAUTION positive terminal (+) of the battery, ● Make sure that the battery cords do and then connect the negative not get stuck between the outboard cord (−).

  • Page 21: Installing The Battery

    INSTALLATION WARNING 3. Installing the battery Battery electrolyte contains sulfuric acid ① P l a c e t h e b a t t e r y b o x i n a and thus is hazardous, causing a burn convenient position away from if it comes in contact with your skin, or water spray.

  • Page 22: Pre-Operating Preparations

    1. Recommended gasoline types TOHATSU recommend the use of gasoline if its ethanol content is less than 10% or CAUTION methanol content is less than 5%, only in case alcohol free gasoline is not available.

  • Page 23: Recommended Engine Oil

    PRE-OPERATING PREPARATIONS and also accelerate rusting of engine parts. engine oil below. Mixing of the moisture in the engine oil 10W-30: is recommended for use in can also deteriorate the properties of the all temperature. lubricant. 25W-40: may be used at temperatures If the use of gasoline containing alcohol above 4˚C (40˚F).

  • Page 24: Break-In

    PRE-OPERATING PREPARATIONS 3. 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 4. Engine oil warning lamp 5. 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 approximately 6,250 rpm). When the warning lamp (Red) is off, it indicates that oil pressure is present.

  • Page 26: Engine Operation

    PRE-OPERATING PREPARATIONS ENGINE OPERATION Before starting ② 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 bulb storage, disconnect stop switch lock should be facing the engine. and pull the starter handle completely out approximately 10 times in order to prime the oil pump.
  • Page 27 ENGINE OPERATION MF, EF and EFT type ⑤ Place the shift lever in the Neutral ⑥ 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 28 ENGINE OPERATION MF type EP and EPT type ⑧ Pull the starter handle slowly until ⑤ Insert the main switch key. you feel engagement, keep pulling ⑥ Set the control lever in the Neutral till you feel less resistance. Then position.
  • Page 29 ENGINE OPERATION CAUTION ② Loosen the screw for starter lock wire. Do not keep turning starter motor for over 5 seconds, or the battery may be consumed, potentially making the engine starting impossible and/or damaging the starter. If cranking over 5 seconds fails to start engine, return main switch to "ON", and crank engine again after 10 seconds or more.
  • Page 30 ENGINE OPERATION ◎ Confirm that the shift lever is at If the choke solenoid fails to neutral position. operate (EP and EPT type only) ◎ Wrap a rope around the starter pulley then pull quickly to start. ① Remove the top cowl. ◎...

  • Page 31: 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 32: Forward And Reverse

    ENGINE OPERATION 3. Forward and reverse MF, EF and EFT type WARNING 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 33 ENGINE OPERATION CAUTION ■ 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 34: Stopping

    ENGINE OPERATION 4. Stopping EP and EPT type MF, EF and 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 35: Trim Angle

    ENGINE OPERATION WARNING 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.
  • Page 36 ENGINE OPERATION EFT and EPT type ■ Improper Trim Angle (bow rise too high) If the trim angle is excessive, the bow will rise out of the water and the speed will decrease. EFT model Furthermore, the bow may sway or the bottom may slam the water while cruising.
  • Page 37 ENGINE OPERATION MF, EF type ① Stop the engine. ② Shift the outboard into neutral. ③ Raise the engine to the tilt up position. ④ Change the thrust rod position. ⑤ Gentry lower the outboard. Thrust Rod Transom angle settings Higher Tilt release position Lower...
  • Page 38 ENGINE OPERATION ② ･ L ock the tilt with the Tilt stopper after the outboard motor has been EPT type ① ･ O perate the Power Tilt switch and tilted up. tilt the outboard motor up. (The Main Switch must be "ON".) Tilt Stopper ③...
  • Page 39 ENGINE OPERATION CAUTION EFT/EPT type The provided Power tilt makes tilt- The power Tilt can be set to any trim up/down electrically. It may be used angle, however, avoid cruising with the as a power trim and tilt when the outboard motor tilted in the tilt range.

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

    ENGINE OPERATION 6. Tilt up, tilt down and shallow water operation ■ Tilt down Slightly tilt the motor up, and pull the tilt lever toward you to release the tilt- WARNING lock. Then lower the motor slowly. When tilting up or down, be careful not to place your hand between the swivel bracket and the stern bracket.
  • Page 41 ENGINE OPERATION ■ Tilt down ① Move the tilt lock knob to the unlock position. ② Raise the outboard to the tilt release position. ③ Gently lower the outboard. Tilt lock knob in lock position Tilt lock knob in unlock position Tilt up position Tilt...

  • Page 42: Shallow Water Operation

    ENGINE OPERATION 7. Shallow water operation MF, EF type ■ Shallow water running position WARNING With the shift lever in Neutral or Forward, tilt the motor up slowly During shallow water operation, be by about 40˚ and then lower the careful not to place your hand between the swivel bracket and the stern bracket.
  • Page 43 ENGINE OPERATION EP type ■ Setting shallow water drive ■ Releasing shallow water drive ① Stop the engine. ① Stop the engine. ② Shift the outboard into forward. ② Tilt the outboard up to the tilt ③ Tilt the outboard up to one of the release position.

  • Page 44: Removing And Carrying The Outboard Motor

    REMOVING AND CARRYING THE OUTBOARD MOTOR 1. Removing the outboard motor 3. Storing the outboard motor ① Stop the engine. Outboard motor should be stored in a ② Disconnect the fuel connector, vertical position. the remote control cables and the battery cords from the outboard Note motor.

  • Page 45: Trailering

    TRAILERING WARNING Do not go under outboard motor tilted up even if it is supported by support bar, or accidental fall of outboard motor could lead to severe personal injury. WARNING Close air vent screw of fuel tank and fuel cock before carrying or storing outboard motor and fuel tank, or fuel may leak, potentially catching fire.

  • Page 46: Adjustment

    ADJUSTMENT 1. Steering friction 2. Throttle grip MF, EF type MF, EF and EFT type The steering friction can be adjusted The turning force of the throttle grip in accordance with your preference can be adjusted with a throttle adjust by turning the steering adjust bolt.

  • Page 47: Remote Control Lever Load

    ADJUSTMENT 3. Remote Control Lever Load Notes EP and EPT type ● The trim tab also acts as an anode (Throttle friction adjustment screw) to prevent electrolytic corrosion. Therefore do not paint or grease To adjust the load of the remote this part.

  • Page 48: Inspection And Maintenance

    ADJUSTMENT 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 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 50 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 ①...
  • Page 51 INSPECTION AND MAINTENANCE ■ Use flushing attachment. Washing outboard motor If outboard motor is used in salt ① 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 the flushing attachment.
  • Page 52 INSPECTION AND MAINTENANCE WARNING 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 53 INSPECTION AND MAINTENANCE ⑤ Attach spark plug and tighten to Replacing the spark plugs specified torque. WARNING 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 54 INSPECTION AND MAINTENANCE ② Recommended oil Checking and Refilling Oil in the Use an automatic transmission Power Tilt. ① Check the oil level of the reservoir fluid or equivalent. tank as shown on the right while Recommended oils are as shown t h e t a n k i s k e p t i n a v e r t i c a l below.

  • Page 55: 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 56 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 engine oil to insure performance and will dramatically shorten the life of the...
  • Page 57 INSPECTION AND MAINTENANCE CAUTION Cleaning the fuel filters and the fuel tank You may be injured due to high engine Fuel filters are located 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 WARNING been cooled.
  • Page 58 INSPECTION AND MAINTENANCE ■ Fuel filter (for fuel tank) Loosen the fuel pickup elbow shown at left, remove it and clean the fuel filter. Fuel Filter pick up elbow ■ Fuel tank Water or dirt in the fuel tank will cause engine performance problems.
  • Page 59 INSPECTION AND MAINTENANCE until oil flows out from upper plug Replacing gear oil hole. 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. ●...

  • Page 60: Off-Season Storage

    INSPECTION AND MAINTENANCE 3. Off-season storage ⑥ Change the gear oil in the gear Before you put your outboard motor case. in storage, it is a good opportunity to ⑦ Apply grease to the propeller shaft. ⑧ Apply grease to all sliding parts, have it serviced and prepared by your dealer.

  • Page 61: Pre-Season Check

    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 62: 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 63: 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 64 TROUBLESHOOTING Possible cause ● ● ● ● ● ● ● Spark plug other than specified ● ● ● ● ● ● Dirt, soot, etc. on spark plug ● ● Faulty oil pressure switch ● ● ● ● ● ● No Spark or weak spark ●...
  • Page 65 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 ● ●...

  • Page 66: 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 (spark plug) Service tools Socket wrench handle Screwdrivers Cross-and straight-point Screwdriver handle...

  • Page 67: Optional Accessories

    OPTIONAL ACCESSORIES Selector Tachometer Genuine gear oil (500ml) Tachometer with oil lamp (for EPT) Touch-up paint (300ml) Propeller Genuine engine oil (450ml) Flushing attachment High thrst propeller...

  • Page 68: 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. 5,000 to 6,000 rpm Propeller Size (Diameter × pitch) Propeller Mark No. of Brades inch 8.9 ×...
  • Page 69 M E M O...
  • Page 70 M E M O...
  • Page 72 OWNER’S MANUAL 6A3Z TOHATSU CORPORATION 9.8A3 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 003-11082-6 1012NB Printed in Japan...

This manual is also suitable for:

Mfs 6a3z mfMfs 6a3z efMfs 6a3z epMfs 8a3 mfMfs 8a3 efMfs 8a3 ep ... Show all

Table of Contents