Changing The Engine Oil - Yamaha F4B Service Manual

a
a
Digital tachometer a: 90890-06760
TIP:
Set the digital tachometer to the 2-cycle 1-
cylinder mode because this engine ignites
the spark plug once per crankshaft rotation.
2. Start the engine and warm it up for 5–10
minutes.
3. Check the engine idle speed. Adjust if out
of specification.
4. Turn the throttle stop screw b in
directions b or c until the specified
engine idle speed is obtained.
c b
Engine idle speed: 1450–1550 r/min
TIP:
• To increase the engine idle speed, turn the
throttle stop screw b in direction b.
• To decrease the engine idle speed, turn the
throttle stop screw b in direction c.
5. Rev the engine a few times.
6. Stop the engine, and then remove the
special service tool.
Predelivery check / General periodic maintenance

Changing the engine oil

The engine oil should be extracted using an
oil changer.
Change the engine oil after the first 20
hours of operation or 3 months, and every
100 hours or at 1-year intervals thereafter.
1. Place the outboard motor in an upright
position.
motor is not level, the oil level indi-
cated on the dipstick may not be accu-
rate.
2. Start the engine and warm it up for 5–10
minutes.
3. Stop the engine and leave it off for 5–10
minutes.
4. Remove the dipstick a, and then extract
the oil completely using the oil changer
b.
b
5. Fill the engine with the specified amount
of the recommended engine oil through
the oil filler hole. Screw in the dipstick a.
NOTICE: Overfilling
cause leakage or damage. If the oil
level is above the upper level mark,
extract until the level meets the
specified level.
General periodic maintenance
NOTICE: If the
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b
the
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1
outboard
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3
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5
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10
oil could
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10-8