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 label is attached to the bottom cowling.
New Technology; (4-stroke/HPDI) EM
EMU39200Manufactured date label
This label is attached to the clamp bracket.
EMU25273Star labels
Your outboard motor is labeled with a Califor-
nia Air Resources Board (CARB) star label.
See below for a description of your particular
label.
1. Approval label location
ZMU06711
1
ZMU07059
EMISSION CONTROL INFORMATION EMTHIS ENGINE CONFORMS TO          CALIFORNIA AND U.S. EPA EXHAUST
REGULATIONS FOR SI MARINE ENGINES. REFER TO THE OWNERS
MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
MEETS U.S. EPA EVAP STANDARDS USING CERTIFIED COMPONENTS.
FAMILY:DISPLACEMENT:            litersSPARK PLUG:
FUEL: GASOLINE
FELs(HC+NOx / CO):        /        g/kW-hr  MAX POWER:              kWIDLE SPEED:          ±         rpm IN NETRAL
SPARK PLUG GAP (mm):
VALVE LASH (mm) IN:                  EX:
YAMAHA MOTOR CO.,LTD.
1. Manufactured date label location
1. Star labels location
ZMU06712
1
Manufactured:
ZMU04346
ZMU06713
1
chapter3  Page 16  Wednesday, December 9, 2009  11:40 AM 
						

							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. Engines meeting these
standards have 20% lower emissions than
One Star-Low-Emission engines.
EMU25300Three Stars—Ultra Low Emission
The three-star label identifies engines that
meet the Air Resources Board’s 2008 ex-
haust emission standards. Engines meeting
these standards have 65% lower emissions
than One Star-Low-Emission engines.
EMU33861Four Stars—Super Ultra Low Emission
The four-star label identifies engines that
meet the Air Resources Board’s Sterndrive
and Inboard marine engine 2009 exhaust
emission standards. Personal Watercraft and
Outboard marine engines may also comply
with these standards. Engines meeting these
standards have 90% lower emissions than
One Star-Low-Emission engines.
ZMU01702
ZMU01703
ZMU01704
ZMU05663
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							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 friction adjuster
10.Fuel tank cap
11.Air vent screw
12.Manual starter handle
13.Throttle friction adjuster
14.Tiller handle
15.Throttle grip
16.Fuel joint17.Fuel joint cap
18.Fuel cock
19.Engine shut-off cord (lanyard)
20.Engine stop button
21.Choke knob
22.Clamp screw
23.Restraint cable attachment
24.Tilt support bar
25.Gear shift lever
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							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, turn it counterclockwise.
Air vent screw
This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.
Fuel joint
This joint is used to connect the fuel line.
Fuel gauge
This gauge is located on either the fuel tank
cap or on the fuel joint base. It shows the ap-
proximate amount of fuel remaining in the
tank.
WARNING
EWM02380
Do not use the portable fuel tank as a fuel
storage container. Commercial users
should conform to relevant licensing or
approval authority regulations.
EMU40090Fuel cock
The fuel cock turns on and off the supply of
fuel from the fuel tank to the engine.
The fuel cock has 3 positions: the closed po-
sition, built-in fuel tank position, and portable
fuel tank position. Depending on how the out-
board motor will be used, align the fuel cock
with the appropriate position indicated on the
label that is affixed to the outboard motor.
1. Air vent screw
2. Fuel tank cap
3. Built-in fuel tank
ZMU06717
1
2
3
1. Air vent screw
2. Fuel gauge
3. Fuel joint
4. Fuel tank cap
1. Fuel cock
2. Closed position
ZMU01992
3
2 4
1
ZMU068801 32 4
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							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 position.
When using a portable fuel tank, align the fuel
cock with the portable fuel tank position.
EMU25912Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
EMU25923Gear shift lever
Move the gear shift lever forward to engage
the forward gear or rearward to engage the
reverse gear.
EMU39700Throttle grip
The throttle grip is on the tiller handle. Turn
the grip “A” to increase speed and “B” to de-
crease speed.
3. Built-in fuel tank position
4. Portable fuel tank position
1. Fuel cock
2. Closed position
1. Fuel cock
ZMU068831
2
ZMU06882
12 3
2. Built-in fuel tank position
3. Portable fuel tank position
1. Tiller handle
1. Forward position
2. Neutral position
3. Reverse position
ZMU06721
1
1 23
ZMU06864
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							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 adjuster provides adjust-
able resistance when the throttle grip is
turned, and can be set according to operator
preference.
To increase resistance, turn the throttle fric-
tion adjuster clockwise.
To decrease resistance, turn the throttle fric-
tion adjuster counterclockwise. When con-
stant speed is desired, tighten the throttle
friction adjuster to maintain the desired throt-
tle setting. WARNING! Do not overtighten
the throttle friction adjuster. If there is too
much resistance, it could be difficult to
turn the throttle grip, which could result in
an accident.
 [EWM02261]
1. Throttle grip
1. Fully open
2. Fully closed
3. Throttle indicator
4. Notch
ZMU06723
1
AB
ZMU06877
0 % 100
12
3
44
3
1. Start mark “”
2. Notch
1. Throttle friction adjuster
ZMU06808
12
ZMU06724
1
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							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
while operating. Do not attach the cord to
clothing that could tear loose. Do not route
the cord where it could become entangled,
preventing it from functioning. Avoid acci-
dentally pulling the cord during normal
operation. Loss of engine power means
the loss of most steering control. Also,
without engine power, the boat could slow
rapidly. This could cause people and ob-
jects in the boat to be thrown forward.
[EWM00122]
EMU26002
Engine stop button
The engine stop button stops the engine
when the button is pushed.
EMU26012Choke knob for pull type
To supply the engine with the rich fuel mixture
required to start, pull out this knob.
EMU39722Fuel joint cap
The fuel joint is equipped with the fuel joint
cap. WARNING! When not using a portable
fuel tank, make sure to install the fuel joint
cap. Otherwise, injury could result from
striking the fuel joint accidentally.
 [EWM02411]
1. Engine shut-off switch
2. Cord
3. Clip
ZMU06725
1
3
2
1. Engine stop button
1. Choke knob
ZMU06726
1
ZMU06784
1
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							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 port side of the outboard motor.To increase resistance, turn the steering fric-
tion adjuster clockwise.
To decrease resistance, turn the steering fric-
tion adjuster counterclockwise.
EMU40100Trim rod (tilt pin)
The trim rod (tilt pin) is used to adjust the trim
angle of the outboard motor in relation to the
angle of the boat transom.
EMU39362Tilt lock mechanism
The tilt lock mechanism is used to prevent the
outboard motor from lifting out of the water
when the gear shift lever is in the reverse po-
sition.
When the gear shift lever is moved to the re-
verse position, the tilt lock mechanism oper-
ates to prevent the outboard motor from being
tilted up.
1. Fuel joint cap
1. Manual starter handle
ZMU06868
1
ZMU06728
1
1. Steering friction adjuster
1. Trim rod
ZMU067291
ZMU068431
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							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, see page 47.
1. Gear shift lever
2. Reverse position
1. Tilt lock
ZMU06838
1 2
1
1
ZMU06839
1. Tilt support bar
2. Tilted up position
3. Shallow water cruising position
1. Cowling lock lever
ZMU06731
1
2
3
ZMU06850
1
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							Components
25
1. Carrying handle
ZMU06787
1
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