Preoperation Checks; Fuel; Oil; Controls - Yamaha 150 Owner's Manual

throttle to 3000 r/min or less.
3. Next two hours:
Accelerate at full throttle onto plane,
then reduce engine speed to three-quar-
ter throttle (approximately 4000 r/min).
Vary engine speed occasionally. Run at
full throttle for one minute, then allow
about 10 minutes of operation at three-
quarter throttle or less to let the engine
cool.
4. Remaining seven hours:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.
5. After the first 10 hours:
Operate the engine normally. Use only
straight gasoline in the fuel tank. The
Yamaha oil injection system provides
proper lubrication for normal operation.
EMU27102

Preoperation checks

EWM00080
WARNING
If any item in the preoperation check is
not working properly, have it inspected
and repaired before operating the out-
board motor. Otherwise an accident
could occur.
ECM00120
CAUTION:
Do not start the engine out of water. Over-
heating and serious engine damage can
occur.
EMU27111

Fuel

Check to be sure you have plenty of fuel
G
for your trip.
Make sure there are no fuel leaks or gaso-
G
line fumes.
Check fuel line connections to be sure they
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are tight (if equipped Yamaha fuel tank or
boat tank).
Be sure the fuel tank is positioned on a se-
G
cure, flat surface, and that the fuel line is
not twisted or flattened, or likely to contact
sharp objects (if equipped Yamaha fuel
tank or boat tank).
EMU27120

Oil

Check to be sure you have plenty of oil for
G
your trip.
EMU27130

Controls

Check throttle, shift, and steering for prop-
G
er operation before starting the engine.
The controls should work smoothly, with-
G
out binding or unusual free play.
Look for loose or damaged connections.
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Check operation of the starter and stop
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switches when the outboard motor is in the
water.
EMU27140

Engine

Check the engine and engine mounting.
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Look for loose or damaged fasteners.
G
Check the propeller for damage.
G
EMU27170
Operation after a long period of
storage
When operating the engine after a long peri-
od (12 months) of storage, proceed as fol-
lows:
1. Use a 50:1 gasoline-oil mixture to start
the engine.
2. Start the engine. Leave it idling.
EWM00090
WARNING
Do not touch or remove electrical parts
G
when starting or during operation.
Keep hands, hair, and clothes away
G
from the flywheel and other rotating
parts while the engine is running.
3. Watch for oil flowing through the oil feed
Operation
26