Insufficient Engine Temperature; Low Engine Oil Pressure; Battery Will Not Charge; Remote Control Operates Hard, Binds, Has Excessive Free-Play, Or Makes Unusual Sounds - Mercury TDI 4.2L Manual

Section 6 - Troubleshooting
Possible Cause
Seawater inlet hose kinked (restricted).
Use of improperly designed hose on inlet side of
seawater pump allowing it to collapse.

Insufficient Engine Temperature

Possible Cause
Faulty thermostats.

Low Engine Oil Pressure

Possible Cause
Faulty senders.
Insufficient amount of oil in the 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.
Unacceptable battery condition.
Remote Control Operates Hard, Binds, Has Excessive Free‑play, or Makes Unusual Sounds
Possible Cause
Insufficient lubrication on shift and throttle linkage
fasteners.
Obstruction in the shift or throttle linkages.
Loose or missing shift and throttle linkages.
Shift or throttle cable kinked.
Improper shift cable adjustment.

Steering Wheel Turns Hard or Jerky

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

Power Trim Does Not Operate (Electric Motor Operates but Sterndrive Unit Does Not Move)

Possible Cause
The trim pump oil level is low.
Page 74
Position hose to prevent kinking (restriction).
Replace hose with wire reinforced design.
Replace. See a Mercury Diesel–authorized repair facility.
Have the system checked by a Mercury Diesel–authorized repair facility.
Check and add oil as required.
Check and remove the required amount of oil. Check for cause of excessive oil
(improper filling).
Change oil and oil filter. Use the correct grade and viscosity oil. Determine the
cause for dilution (excessive idling).
Turn off nonessential accessories.
Check all associated electrical connections and wires (especially
battery cables). Clean and tighten faulty connections. Repair or
replace damaged wiring.
Replace or adjust.
Test battery.
Lubricate.
Remove the obstruction.
Check all throttle and shift linkages. If any are loose or missing, see a
Mercury Diesel–authorized repair facility immediately.
Straighten cable or have a Mercury Diesel–authorized repair facility
replace cable if damaged beyond repair.
Have adjustment checked by a Mercury Diesel–authorized repair facility.
Check for leak. Refill the system with fluid.
Replace and/or adjust.
Check all parts and fasteners; if any are loose or missing, see a Mercury
Diesel–authorized repair facility immediately.
See a Mercury Diesel–authorized repair facility.
Fill the trim pump with oil.
Remedy
Remedy
Remedy
Remedy
Remedy
Remedy
Remedy
90-8M0114081 DECEMBER 2015
eng