Yamaha F90D - Page 227

6D81G11
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Lubrication system
Check the oil pump for debris or
oil leaks.
Check the engine oil level.
Check the oil pressure.
Check the oil pressure switch.
Clean or replace the defective
parts.
At specified
level?
Within
specification?
Check the oil
passage.
Yes
Yes
No
No
Yes
Yes
No
No
Add engine oil to the correct
level.
Replace the oil pressure switch.
Check the engine using the
Yamaha Diagnostic System.
Good condition?
Debris or leaks?
Power unit