Low Engine Oil Pressure; Battery Will Not Come Up On Charge; Power Trim Does Not Operate (Motor Doesn't Run) - Mercury 540 Bravo Manual

Low Engine Oil Pressure

Possible Cause
Insufficient oil in system.
Excessive oil in system
(causing it to become aerated).
Diluted or improper viscosity oil.
Faulty gauge or sender.
Excessive oil temperature.
Engine mechanical: oil pump,
excessive bearing clearance,
etc.

Battery Will Not Come Up On Charge

Possible Cause
Excessive current draw from
battery.
Loose or dirty electrical
connections or damaged wiring.
Alternator drive belt loose or in
poor condition.
Defective battery.

Power Trim Does Not Operate (Motor Doesn't Run)

Possible Cause
Open fuse.
Loose or dirty electrical
connections or damaged
wiring.
TROUBLESHOOTING
Check and add oil.
Check and bring oil to required level.
Check for cause of excessive oil (improper
filling, defective fuel pump, etc.).
Change oil and oil filter, using correct
grade and viscosity oil. Determine cause
for dilution (excessive idling, faulty fuel
pump, etc.).
Test with mechanical shop gauge; test
sender.
Faulty oil thermostat.
Repair as necessary.
Turn off non‑essential accessories.
Check all associated electrical
connections and wires (especially
battery cables). Clean and tighten faulty
connections. Repair or replace damaged
wiring.
Replace and/or adjust.
Test battery.
Replace fuse.
Check all associated electrical connections
and wires (especially battery cables). Clean
and tighten faulty connections. Repair or
replace damaged wiring.
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Remedy
Remedy
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