TOHATSU MD 70-90C2 Service Manual page 301

Check needle valve of
vapor separator.
Normal?
YES
Check ignition system,
lubrication system and/or
cooling system.
Check oil level in the
oil tank.
Within specified
range?
YES
Check oil level sensor.
Normal?
YES
Check operation of oil pump.
Normal?
YES
Check ignition system,
fuel system and/or
cooling system.
TLDI 75/90C2 2010
Lubrication system
NO
Check oil pump for damage
and oil leak.
Clogging or leak?
Clean or replace
defective parts.
NO
Replace needle valve.
NO
Add engine oil to
specified level.
NO
Replace oil level
switch.
NO
Check oil passage.
YES
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