Section 7 - Troubleshooting
Page 86
90-899883175 DECEMBER 2007
Possible Cause
Remedy
Seawater pickups or sea strainer obstructed.
Remove obstruction.
Faulty thermostat.
Replace.
Coolant level (if equipped) low in closed cooling
section.
Check for cause of low coolant level and repair. Fill
system with proper coolant solution.
Heat Exchanger or Fluid Cooler plugged with foreign
material
Clean Heat Exchanger, Engine Oil Cooler, and
Transmission Oil Cooler (if equipped).
Loss of pressure in closed cooling section.
Check for leaks. Clean, inspect and test pressure cap.
Faulty seawater pickup pump.
Repair.
Seawater discharge restricted or plugged.
Clean exhaust elbows.
Insufficient Engine Temperature
Possible Cause
Remedy
Faulty thermostat.
Replace.
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).
Diluted or improper viscosity oil.
Change oil and oil filter, using correct grade and
viscosity oil. Determine cause for dilution (excessive
idling).
Battery Will Not Recharge
Possible Cause
Remedy
Excessive current draw from battery.
Turn off non‑essential accessories.
Alternator drive belt loose or in poor condition.
Replace and/or adjust.
Unacceptable battery condition.
Test battery, replace if necessary.
Loose or dirty electrical connections or damaged
wiring.
Check all associated electrical connections and wires
(especially battery cables). Clean and tighten faulty
connections. Repair or replace damaged wiring.
Faulty alternator
Test alternator output, replace if necessary.
Remote Control Is Difficult to Move, Has Excessive Play, or Makes Unusual Sounds
Possible Cause
Remedy
Insufficient lubrication on shift and throttle linkage
fasteners.
Lubricate.
Obstruction in shift or throttle linkages.
Remove obstruction.
Loose or missing shift and throttle linkages.
Check all throttle linkages. If any are loose or missing,
see authorized Mercury MerCruiser dealer
immediately.
Shift or throttle cable kinked.
Straighten cable or have authorized Mercury
MerCruiser dealer replace cable if damaged beyond
repair.
Summary of Contents for Scorpion 350
Page 8: ...Page iv 90 899883175 DECEMBER 2007 ...
Page 26: ...Section 1 Warranty Notes Page 18 90 899883175 DECEMBER 2007 ...
Page 38: ...Section 2 Getting to Know Your Power Package Notes Page 30 90 899883175 DECEMBER 2007 ...
Page 76: ...Section 5 Maintenance Notes Page 68 90 899883175 DECEMBER 2007 ...
Page 90: ...Section 6 Storage Notes Page 82 90 899883175 DECEMBER 2007 ...
Page 96: ...Section 7 Troubleshooting Notes Page 88 90 899883175 DECEMBER 2007 ...