Insufficient Engine Temperature; Low Engine Oil Pressure; Battery Will Not Recharge; Remote Control Is Difficult To Move, Has Excessive Play, Or Makes Unusual Sounds - Mercury 3.0 MPI ECT Operation & Maintenance Manual

Insufficient Engine Temperature

Faulty thermostat.

Low Engine Oil Pressure

Possible Cause
Insufficient oil in crankcase.
Excessive oil in crankcase (causing it to
become aerated).
Diluted or improper viscosity oil.

Battery Will Not Recharge

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

Remote Control Is Difficult to Move, Has Excessive Play, or Makes Unusual Sounds

Possible Cause
Insufficient lubrication on shift and throttle linkage
fasteners.
Obstruction in shift or throttle linkages.
Loose or missing shift and throttle linkages.
Shift or throttle cable kinked.

Steering Wheel Jerks or Is Difficult to Turn

Possible Cause
Low power steering pump fluid level.
Drive belt loose or in poor condition.
Insufficient lubrication on steering components. Lubricate.
Loose or missing steering fasteners or parts.
Contaminated power steering fluid.

Power Trim Does Not Operate (Motor Does Not Operate)

Possible Cause
Blown fuse.
90-8M0113856 DECEMBER 2015
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Possible Cause
Check and add oil.
Check and remove required amount of oil. Check for cause of excessive oil
(improper filling).
Change oil and oil filter, using correct grade and viscosity oil. Determine
cause for dilution (excessive idling).
Turn off nonessential accessories.
Replace and/or adjust.
Test battery, replace if necessary.
Check all associated electrical connections and wires (especially
battery cables). Clean and tighten faulty connections. Repair or
replace damaged wiring.
Test alternator output, replace if necessary.
Lubricate.
Remove obstruction.
Check all linkages. If any are loose or missing, see authorized
Mercury MerCruiser dealer immediately.
Straighten cable or have authorized Mercury MerCruiser dealer
replace cable if damaged beyond repair.
Check for leak. Refill system with fluid.
Replace and/or adjust.
Check all parts and fasteners. If any are loose or missing, see authorized
Mercury MerCruiser dealer immediately.
See authorized Mercury MerCruiser dealer.
Replace fuse. Fuses may be located near the dash trim switch, at the trim pump, in the
positive (red) power trim battery lead near the battery switch, or a combination of these.
Section 6 - Troubleshooting
Remedy
Replace.
Remedy
Remedy
Remedy
Remedy
Remedy
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