Mainship 40 Trawler Single, Operator'S Manual

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Mainship 40 Trawler Single & Twin • Engines and Transmissions
11.9
Low oil pressure Insufficient oil in crankcase Check and add correct grade and
viscosity oil. Visually check engine
for leaks
Excess oil in crankcase Check and remove required amount
of oil. Check for cause of excessive
oil (improper filling, bad fuel pump,
etc.).
Diluted or improper grade and vis-
cosity oil Change oil and oil filter. Be sure to
use the correct grade and viscosity
oil
Oil leak in pressure line Inspect all oil lines and tighten all
connections as necessary
No oil pressure Defective gauge, gauge tube, or oil
line Replace gauge or gauge sender
No oil in engine Refill crankcase. See engine manu-
al for proper grade and viscosity
High oil pressure Too heavy grade of oil Drain oil and replace. See engine
manual for proper grade
Dirt or obstruction in oil line Drain and clear oil system.
Check for bent or flattened oil lines
and replace as necessary
Sludge in oil Infrequent oil changes Drain oil and refill with oil of proper
grade and viscosity
Dirty oil filter Replace filter
Water in oil Drain oil and refill. See your dealer
if problem persists
Transmission shifts hard Corroded or pinched linkage Lubricate or replace linkage as
needed