Yamaha 4 Stroke Owners Manual

Specifications and requirements
16

Waterproof flashlight with extra batteries.

An extra engine shut-off cord (lanyard) with
clip.

Spare parts, such as an extra set of spark
plugs.
Consult your Yamaha dealer for details.
EMU25221
Emission control informationEMU25230North American models
This engine conforms to U.S. Environmental
Protection Agency (EPA) regulations for ma-
rine SI engines. See the label affixed to your
engine for details.
EMU25242Approval label of emission control certifi-
cate
This...

Specifications and requirements
17
EMU25280One Star—Low Emission
The one-star label identifies engines that
meet the Air Resources Board’s 2001 ex-
haust emission standards. Engines meeting
these standards have 75% lower emissions
than conventional carbureted two-stroke en-
gines. These engines are equivalent to the
U.S. EPA’s 2006 standards for marine en-
gines.
EMU25290Two Stars—Very Low Emission
The two-star label identifies engines that meet
the Air Resources Board’s 2004 exhaust
emission standards....

Components
18
EMU2579R
Components diagram
TIP:
* May not be exactly as shown; also may not be included as standard equipment on all models.
F4, F6
EMU39542Fuel tank (built-in fuel tank)
This outboard motor is equipped with a built-
in fuel tank and its parts are as follows.
ZMU06715
1
2
3
11
12
13
15
14 21
1918
2016
17
22 23 24 25 4
5 6 8
7 910
1. Top cowling
2. Cowling lock lever
3. Carrying handle
4. Anti-cavitation plate
5. Propeller*
6. Cooling water inlet
7. Trim rod
8. Clamp bracket
9. Steering...

Components
19
Fuel tank cap
This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap, turn it counterclockwise.
Air vent screw
This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.
EMU39353Fuel tank (portable fuel tank)
This model can be equipped with an optional
portable fuel tank. The parts of the fuel tank
are as follows.
Fuel tank cap
This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap,...

Components
20
EMU39210Close
To stop the fuel flow from the fuel tank to the
carburetor, align the fuel cock with the closed
position.
When the engine is not running, always align
the fuel cock with the closed position.
EMU39222Open
To send fuel from the fuel tank to the carbure-
tor, align the fuel cock with the position for the
built-in fuel tank or portable fuel tank accord-
ing to which fuel tank is being used.
When using the built-in fuel tank, align the fuel
cock with the built-in fuel tank...

Components
21
EMU39711Throttle indicator
The throttle indicator shows the throttle posi-
tion. When the 100% position of the throttle in-
dicator is aligned with the notch in the tiller
handle, the throttle is fully open. When the 0%
position of the throttle indicator is aligned with
the notch in the tiller handle, the throttle is fully
closed.
The engine start mark “” on the throttle indi-
cator shows the throttle position for starting
the engine.EMU39242Throttle friction adjuster
The throttle friction...

Components
22
EMU25994Engine shut-off cord (lanyard) and 
clip
The clip must be attached to the engine shut-
off switch for the engine to run. The cord
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power. WARNING! At-
tach the engine shut-off cord to a secure
place on your clothing, or your arm or leg...

Components
23
EMU26073Manual starter handle
The manual starter handle is used to crank
and start the engine.
EMU39252Steering friction adjuster
WARNING
EWM02270
Do not overtighten the steering friction ad-
juster. If there is too much resistance, it
could be difficult to steer, which could re-
sult in an accident.
The steering friction adjuster provides adjust-
able resistance to the steering mechanism,
and can be set according to operator prefer-
ence. The steering friction adjuster is located
on the...

Components
24
When the gear shift lever is moved to the neu-
tral position or forward position, the outboard
motor can be tilted up.
EMU39831Tilt support bar
Use the tilt support bar to keep the outboard
motor in the tilted up position or a shallow wa-
ter cruising position.
EMU39261Cowling lock lever
The cowling lock lever is used to secure the
top cowling.
EMU39372Carrying handle
The carrying handle is used to carry the out-
board motor. For information on carrying and
transporting the outboard motor,...

Components
25
1. Carrying handle
ZMU06787
1
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