Yamaha 4 Stroke Owners Manual

Operation
46
2. Hold the rear of the top cowling and
slightly tilt the outboard motor up until the
tilt support bar automatically locks. The
outboard motor can be operated in this
position for shallow water cruising. The
outboard motor is equipped with 3 shal-
low water cruising positions.
EMU40041Procedure for returning to normal cruising
1. To tilt the outboard motor down to the
normal running position, move the gear
shift lever to the neutral position.
2. Slightly tilt the outboard motor up, and
then...

Maintenance
47
EMU39901
Transporting and storing out-
board motor
WARNING
EWM00695

USE CARE when transporting a fuel
container, whether in a boat or car.

DO NOT exceed the specified capacity
of a fuel container. Gasoline will expand
considerably as it warms up and can
build up pressure in the fuel container.
This can cause fuel leakage and a poten-
tial fire hazard.

Leaking fuel is a fire hazard. When trans-
porting and storing the outboard motor,
close the fuel cock to prevent fuel from
leaking....

Maintenance
48
5. To prevent steering movement, turn the
steering friction adjuster clockwise.
6. Turn the tiller handle 180° so that it is
pointing rearward.
7. Loosen the clamp screws.8. Hold the carrying handle and the hand-
grip on the front side of the bottom cowl-
ing and lift up the outboard motor using
two people to dismount it from the boat.
9. When transporting or storing the out-
board motor while removed from a boat,
use an outboard motor stand.
1. Fuel hose
2. Fuel joint cap
1. Steering...

Maintenance
49
10. If transporting or storing the outboard mo-
tor horizontally cannot be avoided, tight-
en the clamp screws completely, place a
towel or something similar under the out-
board motor to protect it from damage,
and then place the outboard motor in the
attitude shown. If the front side of the out-
board motor is facing down, turn the
clamp bracket 90° so that it does not con-
tact the ground, and then turn the steer-
ing friction adjuster clockwise to secure
the bracket.
EMU39912Storing...

Maintenance
50

Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
EMU28305ProcedureEMU39602Flushing in a test tank
NOTICE
ECM00301
Before starting the engine, make sure to
supply water to the cooling water passag-
es. Otherwise, the engine could overheat
and be damaged.
Cooling system flushing is essential to pre-
vent the cooling system from clogging up with
salt, sand, or dirt. In addition, fogging of the
engine is mandatory to prevent excessive en-
gine damage due to...

Maintenance
51
7. Fill the test tank with fresh water to above
the level of the anti-cavitation plate.
NOTICE: If the fresh water level is be-
low the level of the anti-cavitation
plate, or if the water supply is insuffi-
cient, engine seizure may occur.
[ECM00291]
8. Start the engine, operate it for 10–15 min-
utes at engine idle speed. WARNING!
Do not touch or remove electrical
parts when starting or during opera-
tion. Keep hands, hair, and clothes
away from the flywheel and other ro-
tating parts...

Maintenance
52
6. Turn on the water supply to the outboard
motor.
7. Start the engine, operate it for 10–15 min-
utes at engine idle speed, and then spray
“Yamaha Stor-Rite Engine Fogging Oil”
into the fogging hole of the silencer. For
further information, see steps 8-9 in
“Flushing in a test tank”.
8. Turn off the water supply to the outboard
motor, and then remove the water flush
plug and tape.
9. Install the fogging hole cap and top cowl-
ing. Align the fuel cock with the closed po-
sition and tighten...

Maintenance
53
EMU37081
Periodic maintenance
WARNING
EWM01981
These procedures require mechanical
skills, tools, and supplies. If you do not
have the proper skills, tools, or supplies to
perform a maintenance procedure, have a
Yamaha dealer or other qualified mechan-
ic do the work.
The procedures involve disassembling
the motor and exposing dangerous parts.
To reduce the risk of injury from moving,
hot, or electrical parts:

Turn off the engine and keep engine
shut-off cord (lanyard) with you when
you...

Maintenance
54
EMU34446Maintenance chart 1
TIP:

Refer to the sections in this chapter for explanations of each owner-specific action.

The maintenance cycle on these charts assume usage of 100 hours per year and regular
flushing of the cooling water passages. Maintenance frequency should be adjusted when op-
erating the engine under adverse conditions such as extended trolling.

Disassembly or repairs may be necessary depending on the outcome of maintenance
checks.

Expendable or consumable parts and...

Maintenance
55
Fuel/engine oil leakage Inspection
Gear oil Replacement
Greasing points Greasing
Impeller/water pump 
housingInspection or replace-
ment as necessary
Impeller/water pump 
housingReplacement
Propeller/propeller 
nut/cotter pinInspection or replace-
ment as necessary
Shift linkInspection, adjustment 
or replacement as nec-
essary
Spark plugInspection or replace-
ment as necessary
Spark plug cap/spark 
plug wireInspection or replace-
ment as necessary
Water from the cooling 
water pilot...