Yamaha F30B 2018, Service Manual

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10-18
General periodic maintenance
b. Install the oil filler cap and dipstick, and
then start the engine and warm it up for 5–
10 minutes.
c. Stop the engine, and then leave it off for 5–
10 minutes.
d. Check the oil level.
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6. Install:
• Top cowling
Changing the gear oil
Never get under the lower unit while it is tilt-
ed.
1. Drain:
• Gear oil
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a. Tilt the outboard motor so that the drain
screw is at the lowest point.
b. Place a drain pan “1” under the gear oil
drain hole.
c. Remove the drain screw “2” and gasket
“3”.
If there is a significant amount of metal par-
ticles on the magnetic drain screw, the low-
er unit may have a problem.
d. Remove the oil level plug “4” and gasket
“5” and let the oil drain completely.
After the gear oil has been drained, check
the used oil. If the oil is milky, water is get-
ting into the lower case, which can cause
gear damage.
e. After the gear oil has been drained, check
the used oil. Pressure test the lower case
and inspect the oil seal for damage if the oil
is milky. See “Checking the lower unit for
air leakage” (8-21).
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2. Fill:
• Gear oil
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a. Place the outboard motor in an upright po-
sition.
b. Insert the gear oil pump into the drain hole,
and then fill the lower unit slowly with gear
oil until oil flows out of the check hole and
no air bubbles are visible.
c. Install a new gasket “1” and the oil level
plug “2”.
1
2
3
4
5
2
1