Mercury D4.2L - Troubleshooting Oil, Battery, and Control Issues; Low Engine Oil Pressure; Battery Charging Problems; Remote Control Operation Issues

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Low Engine Oil Pressure
Possible Cause Remedy
• Insufficient oil in crankcase • Check and add oil.
• Excessive oil in crankcase (causing it to
become aerated)
• Check and remove required amount of oil.
Check for cause of excessive oil (improper
filling, bad fuel pump, etc.).
• Diluted or improper viscosity oil • Change oil and oil filter, using correct grade
and viscosity oil. Determine cause for dilution
(excessive idling, faulty fuel pump, etc.).
• Faulty senders • Have system checked by an Authorized
MerCruiser Dealer.
Battery Will Not Come Up On Charge
Possible Cause Remedy
• Excessive current draw from battery • Turn off non-essential accessories.
• Loose or dirty electrical connections or
damaged wiring
• Check all associated electrical connections and
wires (especially battery cables). Clean and tight-
en faulty connections. Repair or replace damaged
wiring.
• Alternator drive belt loose or in poor condition • Replace and/or adjust.
• Unacceptable battery condition • Test battery.
Remote Control Operates Hard, Binds, Has Excessive Free-play Or Makes Un-
usual Sounds
Possible Cause Remedy
• Insufficient lubrication on shift and throttle
linkage fasteners
• Lubricate.
• Loose or missing shift and throttle linkage
fasteners
• Check all linkages. If any are loose or missing, see
Authorized MerCruiser Dealer immediately.
• Obstruction in shift or throttle linkages • Remove obstruction.
• Shift or throttle cable kinked • Straighten cable, or have dealer replace
cable if damaged beyond repair.
• Vacuum leak at shift cylinder, hose or fittings
of Power Shift Assembly, if so equipped
• Repair cut, pinched, or kinked hose or faulty
shift cylinder.
• Improper shift cable adjustment. • See Authorized MerCruiser Dealer immedi-
ately for shift cable adjustment .