Poor Performance; Incorrect Engine Temperature; Low Engine Oil Pressure; Battery Will Not Charge - Mercury 92‑813054A2 Manual

Poor Performance

Possible Cause
Throttle not fully open.
Damaged or improper propeller.
Excessive bilge water.
Boat overloaded or improperly distributed. Reduce load or redistribute more evenly.
Boat bottom fouled or damaged.
Electronic fuel system fault.

Incorrect Engine Temperature

Possible Cause
Water inlet or seacock closed.
Drive belt loose or in poor condition.
Seawater pickups or sea strainer obstructed.
Faulty thermostat.
Coolant level low in closed cooling section.
Heat exchanger cores plugged with foreign material.
Loss of pressure in closed cooling section.
Faulty seawater pickup pump.
Seawater discharge restricted or plugged.
Seawater inlet hose kinked (restricted).
Use of improperly designed hose on inlet side of
seawater pump allowing it to collapse.
Faulty thermostats.

Low Engine Oil Pressure

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

Battery Will Not Charge

Possible Cause
Excessive current draw from battery.
Loose or dirty electrical connections or damaged wiring.
Alternator drive belt loose or in poor condition.
90-8M0069748 APRIL 2012
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Inspect throttle cable and linkages for proper operation.
Replace propeller. See a Mercury Diesel authorized repair facility.
Drain and check for cause of entry.
Clean or repair as necessary.
Have electronic fuel system checked by a Mercury Diesel authorized repair
facility.
Open.
Replace or adjust belt.
Remove obstruction.
Replace. See a Mercury Diesel authorized repair facility.
Check for cause of low coolant level and repair. Fill system with
proper coolant solution.
Clean heat exchanger. See a Mercury Diesel authorized repair
facility.
Check for leaks. Clean, inspect, and test pressure cap. See a
Mercury Diesel authorized repair facility.
Repair. See a Mercury Diesel authorized repair facility.
Clean exhaust elbows. See a Mercury Diesel authorized repair
facility.
Position hose to prevent kinking (restriction).
Replace hose with wire reinforced design.
Replace. See a Mercury Diesel authorized repair facility.
Have system checked by a Mercury Diesel authorized repair facility.
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 non‑essential accessories.
Check all associated electrical connections and wires (especially
battery cables). Clean and tighten faulty connections. Repair or
replace damaged wiring.
Replace or adjust.
Section 7 - Troubleshooting
Remedy
Remedy
Remedy
Remedy
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