Tohatsu MWX50D2 User Manual

GB

OWNER’S MANUAL

F

MANUEL

DE L’UTILISATEUR

ES

MANUAL

DEL PROPIETARIO

MX 50D2

MWX 50D2

OB No.003-11098-0

OWNER’S

MANUAL

MX 50D2

MWX 50D2

OB No.003-11098-0

READ THIS MANUAL BEFORE USING THE OUTBOARD MOTOR. FAILURE TO FOLLOW THE INSTRUCTIONS AND SAFETY PRECAUTIONS IN THIS MANUAL CAN RESULT IN SERIOUS INJURY OR DEATH. KEEP THIS MANUAL IN A SAFE LOCATION FOR FUTURE REFERENCE.

Copyright © 2011 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.

YOUR TOHATSU OUTBOARD MOTOR

OWNER REGISTRATION AND IDENTIFICATION

Upon purchasing this product, be sure that the WARRANTY CARD is correctly and completely filled out and mailed to the addressee noted there on. This WARRANTY CARD identifies you as the legal owner of the product and serves as your warranty registration.

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.

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.

Serial Number

In the space below, please record the outboard motor's serial number (indicated both on the bottom cowl and on the cylinder block). The serial number will be needed in ordering spare parts and the event of theft or to quickly identifying the outboard motor type.

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. Should a problem arise with the outboard motor, please follow the troubleshooting procedures listed at the end of this manual. If the problem persists, contact an authorized TOHATSU service shop or dealer.

We hope you will enjoy your outboard motor and wish you good luck in your boating adventures.

TOHATSU CORPORATION

CONTENTS

GENERAL SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2. NAMES OF PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1. Mounting the outboard motor on boat . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2. Propeller Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4. PRE-OPERATING PREPARATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1. Recommended gasoline types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2. Recommended engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3. Break-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5. ENGINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1. Starting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. Warming up the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3. Forward and reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4. Shallow water running . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5. Stopping the engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6. Trim angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 7. Mooring with the engine tilted up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6. REMOVING AND CARRYING THE OUTBOARD MOTOR. . . . . . . . . . . . . . 32

1. Removing the outboard motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 2. Carrying the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3. Storing the outboard motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7. TRAILERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 8. ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

1. Trim tab adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 2. Steering load adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 3. Throttle grip turning load adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9. INSPECTION AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

1. Daily inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2. Periodic inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 3. Off-season storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 4. Pre-season check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 5. Checking after striking underwater object . . . . . . . . . . . . . . . . . . . . . . . . . 51 6. If the engine becomes submerged in water. . . . . . . . . . . . . . . . . . . . . . . . 51 7. Precautions in cold weather. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

10. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 11. TOOL KIT AND SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 12. OPTIONAL ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 13. PROPELLER TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 14. WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

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

14.WIRING DIAGRAM

1

2

3

4

5

6

7

8

9

10

11

12

13

14

8

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," "WARNING," "CAUTION," and "Note." Always pay special attention to such information to ensure safe operation of the outboard motor at all times.

DANGER

Failure to observe will result in severe personal injury or death, and possibly property damage.

WARNING

Failure to observe could result in severe personal injury or death, or property damage.

CAUTION

Failure to observe could result in personal injury or property damage.

Note

This instruction provides special information to facilitate the use or maintenance of the outboard motor or to clarify important points.

EMERGENCY STOP SWITCH

The Emergency Stop Switch will stall the outboard motor when the stop switch tether is pulled off. This stop switch tether can be attached to the operator of the outboard motor to minimize or prevent injuries from the propeller in case the operator falls overboard.

We highly recommend use of the Emergency Stop Switch tether.

WARNING

Accidental activation of the Emergency Stop Switch (such as the tether being pulled out in heavy seas) could cause passengers to lose their balance and even fall overboard, or it could result in loss of power in heavy seas, strong currents, or high winds. Loss of control while mooring is another potential hazard.

To minimize accidental activation of the Emergency Stop Switch, the 500 mm (20 inch.) stop switch tether is coiled and can extended to a full 1,300 mm (51 inch.).

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. To learn about the correct operation and maintenance of the outboard motor, please read through this manual carefully.

It is very difficult for a person standing or floating in the water to take evasive action should he or she see a power boat heading in his /her direction, even at a slow speed. Therefore, when your boat is in the immediate vicinity of people in the water, the outboard motor should be shifted to neutral and shut off.

WARNING

SERIOUS INJURY IS LIKELY IF A PERSON IN THE WATER MAKES CONTACT WITH A MOVING BOAT, GEAR HOUSING, PROPELLER, OR ANY SOLID DEVICE RIGIDLY ATTACHED TO A BOAT OR GEAR HOUSING.

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 recommended lubricants.

MAINTENANCE

As the owner of this outboard motor, you should be acquainted with correct maintenance procedures. It is the operator's responsibility to perform all safety checks and to ensure that all lubrication and maintenance instructions are complied with for safe operation. Please comply with all instructions concerning lubrication and maintenance. You should take the engine to an authorized dealer or service shop for periodic inspection at the prescribed intervals.

Correct periodic maintenance and proper care of this outboard motor will reduce the chance of problems and limit overall operating expenses.

MOUNTING

Outboard motor mounting must be performed by trained service person(s) using lift or hoist with sufficient capacity.

10 SPECIFICATIONS

SPECIFICATIONS

X50D2MF, WX50D2MF

			Item	MODEL	X50D2MF		WX50D2MF
	1
			Overall Length	mm (in)	1,143 (45.0)		1,145 (45.1)
			Overall Width	mm (in)	384 (15.1)		384 (15.1)
				S mm (in)	1,225 (48.2)
			Overall Height	L mm (in)	1,352 (53.2)		1,413 (55.6)
				LL mm (in)	1,427 (56.1)
				UL mm (in)	1,479 (58.2)
				S mm (in)	403 (15.9)
			Transom Height	L mm (in)	530 (20.9)		550 (21.7)
				LL mm (in)	570 (22.5)
				UL mm (in)	657 (25.9)
				S kg (lb)	72 (159)
			Weight	L kg (lb)	73.5 (162)		79 (174)
				LL kg (lb)	74 (163)
				UL kg (lb)	75 (165)
			Output	kW (Hp)		36.8 (50)
			Max. Operating Range	rpm		5,150-5,850
			Number of Cylinders			3
			Piston Displacement	mL (Cu in)		697 (42.53)
			Bore x Stroke	mm (in)		68 x 64 (2.68 x 2.52)
			Exhaust System			Through hub exhaust
			Engine Lubrication			Premixed Fuel
			Fuel mixing Ratio			50 : 1
			Cooling System			Forced water cooling
			Starting System			Manual
			Ignition System		Flywheel Magneto C.D. Ignition
			Spark Plugs			NGK B8HS-10
			Trim Position			6
			Engine Oil		Genuine Motor Oil or recommended one (TCW-III)
			Gear Oil*		approx. 500mL		approx. 700mL
			Fuel Tank Capacity	L (US gal)		25 (6.6)
			Engine Oil Capacity	L (US gal)
			Gear Reduction Ratio		1.85 (13 : 24)		1.92 (12 : 23)
			Fuel		Unleaded regular gasoline pump posted 87 Octane (research octane
					rating of 91)

* Genuine Gear Oil or API GL5, SAE #80 to #90

Remark: This specifications might change without a previous notice.

NAMES OF PARTS 11

NAMES OF PARTS

X50D2MF, WX50D2MF

1

			19	20
			18
2					2
			16	21
3			17	5
4			15
5
			14
			13
			22
6		12
7
8
		11
9		10
1	Tilt Handle	10	Oil Plug (lower)	19 Starter Handle
2	Top Cowl	11	Water Strainer	20 Stop Switch
3	Hook Lever	12	Oil Plug (upper)	21 Choke Knob
4	Water Check Port	13	Clamp Bracket	22 Anode
5	Reverse Lock Lever	14	Thrust Rod
6	Water Plug	15	Clamp Screw
7	Anti-ventilation Plate	16	Throttle Grip
8	Trim Tab	17	Adjust Nut
9	Propeller	18	Shift Lever

12 INSTALLATION

INSTALLATION

1.Mounting the outboard motor on boat

WARNING

Most boats are rated and certified in terms of their maximum allowable horsepower, as shown on the boat’s certification plate. Do not equip your boat with an outboard

3motor that exceeds this limit. If in doubt, contact your dealer.

Do not operate the outboard motor until it has been securely mounted on the boat in accordance with the instructions below.

 Twin-engine Installation

When installing two outboard engines, be sure to keep an interval of approximately 470 - 660 mm (18.5 - 26 in) between the two.

470 - 660 mm

(18.5 - 26.1 in)

Note

Consult your authorized dealer to receive the proper instructions or ask your dealer to mount the motor as necessary.

Installation

 Single-engine Installation

Position the outboard engine at the exact center of the stern, and mount it using a cushioning pad or plate.

CAUTION

Before beginning the running test, check that the boat with maximum capacity loading floats on the water in a proper attitude. Check the position of water surface on the driveshaft housing. If the water surface is near the bottom cowling, in high waves, water may enter the engine cylinders.

Incorrect outboard motor mounting height or existence of underwater object(s), such as hull bottom design, bottom surface conditions or underwater accessories, can cause water spray possibly reaching the engine through an opening of the bottom cowling during cruising. Exposing engine to such conditions for extended periods can lead to severe engine damage.

A A

 Transom Height

Install the engine with the Anti-ventilation Plate at a level 10~30mm (0.4~1.2in.) below the bottom of the boat.

10 ~ 30mm (0.4~1.2 in.)

Anti-ventilation Plate

 Transom Matching

Be sure that anti ventilation plate of the outboard is below the water surface when running with wide open throttle.

In case the above condition cannot be met due to the shape of your boat, please consult your authorized dealer.

CAUTION

Overheating may occur if the Anti-ventila- tion Plate is at a level higher than the bottom of the boat, as a result of a lack of cooling water.

If the height difference exceeds 10~30mm (0.4~1.2 in) engine power performance is likely to be reduced as a result of increased water resistance to the gear case assembly.

INSTALLATION 13

 Attaching the Clamp Bracket
After positioning the Clamp Bracket, fix it
with clamp screw then drill four holes in
the transom board, matching the holes in
the Clamp Bracket. Secure the engine with
the supplied bolts (M12 x 105mm) and
nuts. Be sure to use the washers. Use the
larger diameter washers inside of the tran-
som board and use the small diameter
washers outside of the clamp bracket.	3
The mounting holes may be drilled before-

hand by referring to the dimensional drawing.

WARNING

Mounting the outboard motor without following this manual can lead to unsafe conditions such as poor maneuverability, going out of control or fire disaster.

Loose clamp screws and/or mounting bolts can lead to the release or displacement of the outboard motor, possibly resulting in lost of control and/or serious personal injury. Be sure that fasteners are tightened to the specified torque (30 Nm (3.0kgf) 13ft·lb). Check the fasteners for tightness from time to time.

Be sure to use outboard mounting fasteners included in the outboard motor package or their equivalents in terms of size, material, quality and strength.

Tighten fasteners to the specified torque (30 Nm (3.0kgf) 13ft·lb). Test cruise to check if fasteners are tightened securely.

Outboard motor mounting must be performed by trained service person(s) using lift or hoist with sufficient capacity.

14 INSTALLATION

Clamp Bracket

Dimensional Drawing

 Manual tilting type

3

		Washer
		(large diameter)
Washer
(small diameter)
Bolt			Nut
(12mm x length 105mm)
	234(9.21”)	Top of transom
117(4.61”)	117(4.61”)
			39(1.54”)
	25(0.98”)		64(2.52”)
	25(0.98”)		89(3.50”)
ø13
	204(8.03”)
102(4.02”)	102(4.02”)
			222(8.74”)
ø13		26(1.02”)	248(9.76”)

CAUTION

Mounting bolts should be installed with the bolt head at inside surface of the transom. Mounting bolts installed with the threaded end at the inside surface of the transom can cause personal injury.

2. Propeller Selection

A propeller must be selected so that the engine rpm measured at wide open throttle while cruising is within the max. operating range; 5,150 to 5,850 rpm

For genuine propellers, refer to PROPELLER TABLE (p. 57).

PRE-OPERATING PREPARATIONS 15

PRE-OPERATING PREPARATIONS

DANGER

Consult an authorized dealer for details on handling of gasoline, if necessary.

Gasoline and its vapors are very flammable and can be explosive.

When carrying a fuel tank containing gasoline:

Close the air vent screw of fuel tank cap, or gasoline vapor will be emitted through the air vent screw, creating a fire hazard.

Do not smoke.

When or before refueling :

Stop the engine, and do not start the engine during refueling.

Do not smoke.

Be careful not to overfill fuel tank. Wipe up any spilled gasoline immediately.

When or before cleaning the gasoline tank :

Dismount fuel tank from the boat.

Place the fuel tank away from every source of ignition, such as sparks or open flames.

Do the work outdoors or in well ventilated area.

Wipe up any spilled gasoline immediately.

After cleaning gasoline tank :

Wipe up any spilled gasoline immediately.

If the fuel tank is disassembled for cleaning, reassemble carefully. Imperfect assembly may cause a fuel leak, possibly leading to fire or explosion.

Dispose of aged or contaminated gasoline in accordance with local regulations.

1. Recommended gasoline types

CAUTION

Use of low-quality gasoline results in a short engine life as well as starting difficulties and other engine problems.

We recommend use for Fuel stabilizer.

Use of unleaded gasoline

Use a major brand of automotive unleaded gasoline with a minimum posted octane 4 rating of 91RON. Automotive gasoline that contain fuel injector cleaner are preferred

for added internal engine cleanliness. Leaded gasoline is acceptable in areas where unleaded gasoline is not available.

16 PRE-OPERATING PREPARATIONS

Use of alcohol free gasoline

CAUTION

		Use of gasoline containing alcohol can
		cause engine starting and/or operating dif-
		ficulties, wear of and damages to engine
		parts, and deterioration of chemical parts,
		which may lead to shortening of your out-
		board motor’s life.
			Note
			The adverse effect caused by the alcohol
4			content is more severe with methanol than
			with ethanol.

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

The alcohol component of the gasoline absorbs moisture from the air, which may disturb regular fuel flow in the fuel system, and also accelerate rusting of engine parts.

Mixing of the moisture in the engine oil can also deteriorate the properties of the lubricant.

If the use of gasoline containing alcohol is inevitable, or presence of alcohol is suspected in the gasoline, it is strongly recommended to add a filter that has water separating capability, and check the fuel system for leaks and mechanical parts for corrosion and abnormal wear more frequently.

And, in case any of such abnormality is found, discontinue the use of such gasoline and contact our dealer immediately.

Damages resulting from the use of gasolines that contain alcohol are not covered under the limited warranty.

Fuel tank capacity : 25 liters (6.6 U.S. gal)

Fuel Tank : When using a fixed fuel tank in place of genuine fuel tank, it is recommended to select a one with a structure facilitating interior cleaning.

WARNING

Do not fill the fuel tank over capacity. The rise of gasoline temperature may cause gasoline to expand which, if overfilled, may leak through air vent screw when it is open. Leaking gasoline is a dangerous fire hazard.

PRE-OPERATING PREPARATIONS 17

Note

2. Recommended engine oil

Use a genuine engine oil or recommended one (TCW3). Refer to your Distributor.

Will not recommend use of other two stroke engine oil.

CAUTION

Do not mix different brands of oil.

Mixing different brands of oil, or different types of oil even if the brand is the same, may cause gelling, resulting in possible filter screen blockage. This could result in serious engine damage because of impaired lubrication performance.

Use of engine oils that do not meet these requirements will result in reduced engine life, and other engine problems.

Add engine oil into fuel oil tank. The mixing ratio with gasoline is 1 : 50 (one part oil and 50 parts gasoline). Mix well by hand. The mixing ratio during break-in running is 1 : 25.

Mixing Ratio

	Engine Oil : Gasoline
			4
During break-in	1 : 25
After break-in	1 : 50

Oil

Fuel by Oil Mixing (1:25, 1:50)

1.2L

1.1L

1.0L

(1: 25)

0.9L

0.8L

1:25

0.7L

0.6L

0.5L

(0.5: 25)

0.4L

(0.4 : 10)

1:50

0.3L

0.2L

(0.2 : 10)

0.1L

0

2L

10L

25L

30L

Gasoline

18 PRE-OPERATING PREPARATIONS

Engine oil – gasoline mixing procedure

For quantities of engine oil and gasoline to be pre-mixed, refer to table in Recommended engine oil (p. 17).

CAUTION

Do not use other than two stroke engine oil with specified grade, or the engine may be damaged.

Do not use fuel prepared in other than specified mixing ratio.

-Lack of engine oil can cause severe 4 engine trouble such as piston seizure.

-Excess of engine oil can shorten spark plug life, and/or cause increase of noxious exhaust.

When portable fuel tank is used for operation of outboard motor(s):

1 Pour engine oil into fuel tank, and then, gasoline.

2 Put cap on the tank, and close tightly.

3 Close air vent plug tightly.

WARNING

Loose cap or air vent plug can cause leak of fuel during shaking the tank.

4Shake the tank to mix engine oil and gasoline well and even.

When fuel tank built in the boat is used for operation of outboard motor(s):

1Prepare separate fuel container for premixing.

2Pour engine oil into fuel container, and then, gasoline.

3Put cap on the container, and close tightly.

4Shake the container to mix engine oil and gasoline well and even.

5 Pour the mixture into fuel tank.

Notes

It is recommended to pre-mix by using separate fuel container. Attempting to pre-mix in the fuel tank built-in the boat can make the mixture uneven.

If built-in fuel tank is used for mixing, pour engine oil into the tank little by little while putting gasoline into the tank.

PRE-OPERATING PREPARATIONS 19

3. Break-in

Your new outboard motor and lower unit require break-in for the moving components according to the conditions described in the following time table.

CAUTION

Operating the outboard motor without break-in can shorten service life of the product.

If any abnormality is experienced during the break-in:

Discontinue the operation immediately.

Have the dealer check the product and take proper action(s) if necessary.

4

		1-10min	10min-2hrs	2-3hrs	3-10hrs	After 10hrs
	Throttle	Idle	Less than 1/2	Less than 3/4	3/4 throttle	Full throttle
	Position		throttle	throttle		available
					Approx.
			Approx.	Full throttle run	4,000 rpm.
	Speed			allowed for 1 min	Full throttle run
			3,000 rpm max
				every 10 min	allowed for 2 min
					every 10 min

Note

Proper break-in allows outboard motor to deliver it full performance for longer service life.

Fuel mix ratio for break-in

Gasoline 25: Genuine Engine Oil 1

25:1 when using genuine engine oil or the recommended one (TCW3).

DANGER

Do not operate the outboard motor in closed area or area with no forced ventilation.

Exhaust gas emitted by this outboard motor contains carbon monoxide that will cause death if inhaled continuously. Inhaling the gas initially causes symptoms such as feeling of sickness, drowsiness and headache.

During operation of the outboard motor :

Keep peripheral area well ventilated.

Always attempt to stay on the windward side of emission.

20 ENGINE OPERATION

ENGINE OPERATION

1. Starting

Preparations

1 Loosen the air vent screw on the tank cap.

WARNING

In case engine starts in gear, do not start cruising. Stop engine immediately and consult an authorized dealer.

Note

The engine will not start unless the switch lock has been properly connected into the emergency stop switch.

WARNING

5Do not operate the engine with gear case out of water.

Severe personal injury, or engine damage will result.

CAUTION

Never fill up portable fuel tanks on board to avoid fire or explosion resulting from spilled gasoline. If gasoline is ever spilled on board, wipe it up thoroughly. Fuel tanks must always be filled up on land.

2Connect the fuel connector to the engine.

3 Install a lock in the stop switch.

Stop switch

Lock

4Feed fuel to the carburetor by squeezing the primer bulb until firm.

Engine side

Fuel tank side

ENGINE OPERATION 21

Starting

 F type

1 Set the shift lever to Neutral

CAUTION

If the engine starts in gear, do not use it. Contact an authorized dealer.

Note

Start-in-gear protection prevents engine from starting at other than neutral shift. Ingear starting of engine will move the boat immediately, potentially leading to falling down or causing passenger(s) to be thrown overboard due to inertial force.

			5
N
R	F

2Turn the throttle grip so that the indicator line meets the "START" mark.

22 ENGINE OPERATION

3 Pull the choke knob fully.

Note

Operation of the choke knob is not required if the engine is warm.

4 Pull the starter rope slowly until resis-

5tance is met.

Give it a sharp tug to start the engine.

5Turn the handle grip to its original position gradually once the engine has started.

6 Push back the choke knob slowly.

7Carefully turn the throttle grip to “SLOW”.

WARNING

Do not operate the engine with gear case out of water.

Severe personal injury, or engine damage will result.

Manual Rope Start - - - in case of trouble with the Recoil Starter

Wind the starter rope around the flywheel a few turns. Give it a sharp tug to start the engine. Use a socket wrench or similar to get a firm grip on the end of the rope.

WARNING

Be careful that your clothes or other items do not get caught in the rotating engine parts.

To prevent accident and injury, do not reattach the recoil starter after the engine has been started using the emergency starter rope. Be sure to put the top cowl back on.

Immediately contact an authorized dealer when reaching shore.

WARNING

Be sure that no bystander(s) is within 2 meters from back of starting operator.

Do not operate the outboard motor with top cowl removed from the power unit, or contacting turning flywheel which can lead to serious personal injury.

ENGINE OPERATION 23

2. Warming up the engine

Before driving the boat, let the engine run at low speed for approximately three minutes to let it warm and allow the oil to circulate through the machine. If the engine is not warmed up beforehand, the engine life will shorten greatly. During the warm-up operation, confirm that cooling water is discharged from the check port and idle port.

	Idle port	Cooling water
		check port

CAUTION

Be sure to warm up engine well before starting cruise. Operating cold engine can give damage to it.

Note

Idle speed may be higher during warming up of engine. If shifted to Forward or reverse during warming up, it may be difficult to shift back to neutral. In such case, stop engine, shift to neutral, and restart engine to warm up.

CAUTION

Be sure to stop engine immediately if cooling water check port is not discharging water, and check if cooling water intake is blocked. Operating engine could lead to overheating potentially leading to engine damage. Consult an authorized dealer if the cause cannot be found.

 Engine speed

Proper idle speed after warm-up operation.

Clutch in (In gear)	Clutch off (Out of gear)
750rpm	900rpm

CAUTION	5

Do not shift to "F" or "R" until turning into proper idle speed.

Do not exceed the full-throttle engine speed.

Wide-open throttle rpm range

50D2 : 5,150 - 5,850rpm

24 ENGINE OPERATION

3. Forward and reverse

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.

WARNING

Attach other end of emergency stop switch tether to the operator's clothing or arm and keep it attached during cruising.

5 Do not attach the tether to a part of clothing that can be torn easily when pulled.

Arrange the tether so that will not be caught by any object when pulled.

Be careful not to pull the tether accidentally during cruising. Unintentional stop of engine can cause loss of control of outboard motor. Rapid loss of engine power can lead to falling down or causing passenger(s) to be thrown over board.

WARNING

Be sure to connect the emergency tethered stop hook to your waist or clothing.

The engine will shut down when the switch lock becomes disconnected from the engine.

Note

Do not increase engine speed unnecessarily in reverse.

F type

Turn the throttle grip toward "SLOW" and move the Shift Lever quickly to Forward or Reverse when the engine speed has reached the lowest rpm.

Reverse Forward

(R)(F)

WARNING

Severe damage, and personal injury, may occur if shifting at high engine speed. Engine must be in the slow idle position before shifting is attempted.

WARNING

Before shifting, make sure that no swimmer(s) or obstacle(s) is ahead or astern of the boat.

CAUTION

Before moving the Shift Lever to Reverse, make sure the Reverse Lock is engaged (in up position).

Do not increase the engine speed unnecessarily while reversing.

The Shift Lever cannot be turned from Neutral to Reverse unless the throttle grip has been turned fully toward "SLOW".

Note

Frequent shifting to forward or reverse can accelerate wear or degradation of parts. In such case, replace gear oil earlier than the period specified.

ENGINE OPERATION 25

5

26 ENGINE OPERATION

4. Shallow water running

WARNING

During shallow water operation, be careful not to place your hand between the swivel bracket and the stern bracket.

Be sure to tilt the outboard down slowly.

Note

Slow down to trolling speed, and shift into neutral before setting outboard motor to shallow water drive position.

5	WARNING

Run at lowest possible speed during cruising 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 may be pushed out of water, resulting in loss of control.

CAUTION

While in shallow water drive position, do not operate the outboard in reverse. Operate the outboard at slow speed and keep the cooling water intake submerged.

F type

1Set the Reverse Lock Lever provided on the starboard side to "Release" by turning it downward.

Reverse lock lever

2Tilt the engine up approx.

45° and lower it. The engine will now be set to the shallow water setting.

3 Releasing the shallow water setting a.Turn the Reverse Lock Lever upward to

set them in "LOCK" position.

b.Tilt up the engine slightly and then let it go down. The shallow water setting is then released.

c.The engine is released from shallow water setting, and locked at normal running position.

ENGINE OPERATION 27

5. Stopping the engine

WARNING

Do not shift into Reverse during planning, or control will be lost leading to serious personal injury, boat may swamp, and/or hull may be damaged.

Do not shift into Reverse during cruising, or control may be lost, falling down or causing passenger(s) to be thrown overboard. Leading to serious personal injury, and steering system and/or shifting mechanism may be damaged.

CAUTION	5

Never stop the engine immediately after a full throttle run. Keep it running for two or three minutes at idling speed (Shift Lever set to Neutral) to allow it to cool down.

F type

1 Reduce the engine speed to idling rpm.

2Keep pressing on the Stop Switch or pull out the lock plate/ The engine will then stop.

28 ENGINE OPERATION

Notes

After stopping the engine, close the air vent screw on the tank cap.

Disconnect the fuel connector of the engine or the fuel tank.

Disconnect the cables from the battery if the engine will not be used for an extended period of time.

3Disconnect the fuel connector from the engine.

5

CAUTION

Never fill up portable fuel tanks on board to avoid fire or explosion resulting from spilled gasoline. If gasoline is ever spilled on board, wipe it up thoroughly. Fuel tanks must always be filled up on land.

4Close the air vent screw on the fuel tank cap.

Air vent screw

6. Trim angle

The following instructions explain how to set the best trim angle of the boat.

F type

The trim angle is adjusted by setting the thrust rod in the correct thrust rod hole.

 Proper trim angle

The trim angle is optimum when the boat is parallel to the water surface while running.

Perpendicular to the water surface

Improper trim angle (bow rises too high)

If the trim angle is excessive, the bow will rise out of the water and the speed will decrease.

Furthermore, the bow may sway or the bottom may slam the water while cruising.

ENGINE OPERATION 29

In this case, decrease the trim angle by setting the thrust rod in a lower hole.

Thrust rod

Select a lower hole

Improper Trim Angle (bow dips into the water)

If the trim angle is too small, the bow will dip into water, the speed will decrease, and water may enter the boat.

In this case, the trim angle should be increased by setting the thrust rod in a higher hole.

Upward

Select a higher hole

WARNING 5

Do not put hand or finger in between outboard motor body and clamp bracket when adjusting trim angle to prevent injury in case the outboard motor body falls.

Unsuitable trim position can cause loss of control of boat.

When testing a trim position, run boat slow initially to see if it can be controlled safely.

WARNING

Excessive trim up or down may lead to unstable boat operation, potentially causing the steering difficulty that leads to accident during cruising.

Do not cruise at high speed if improper trim position is suspected. Stop the boat and readjust trim angle before continuing cruise.

For outboard motor model with PTT switch on the bottom cowl, do not operate the switch during cruising, or control of boat may be lost.

30 ENGINE OPERATION

			3 Tilt the engine up entirely. The tilt will
	7. Mooring with the engine tilted up
			lock in the raised position.
	When the engine has been stopped and it
	will not be used for a long time or when
	mooring in shallow water, tilt the engine up
	to prevent damage to the propeller and
	gear case.
	1 Disconnect the fuel connector from the
	engine.

5

2Set the Reverse Lock Lever on the starboard side to "RELEASE" by turning it downward.

Reverse lock lever

WARNING

Do not put hand or finger in between outboard motor body and clamp bracket when adjusting trim angle to prevent the body parts from being caught in case the outboard motor body falls.

When tilting up outboard motor with fuel joint for over a few minutes, be sure to disconnect fuel hose or close fuel cock, or fuel may leak, potentially catching fire.

CAUTION

Do not tilt up outboard motor during operation, or engine may be damaged from overheating because of no feed of cooling water.