176
MONTEREY
BOATS
Troubleshooting Guide
PROBLEM
CAUSE & SOLUTION
The boat vibrates at cruising speeds.
•
Propellers may be damaged & need repair.
•
A propeller or propeller shaft is bent. Repair or replace
damaged components.
•
The running gear is fouled by marine growth or rope. Clean
running gear.
•
The engine outdrives are not trimmed properly. Trim
outdrives.
• The engines are not at the same RPM. Synchronize throttles.
ENGINE PROBLEMS
An engine is running too hot.
•
The raw water supply line to the pump is kinked. Replace
hose.
•
The engine raw water pump belt is loose or worn. Tighten
or replace the belt. (Mercruiser Engines)
•
The engine raw water pump impeller is worn or damaged.
Repair the pump.
•
The engine thermostat is faulty and needs to be replaced.
•
The fresh water cooling heat exchanger is clogged and needs
to be cleaned.
•
The exhaust manifolds or riser water ports are clogged and
need to be cleaned or the manifold or riser replaced.
An engine alternator is not charging properly.
•
The engine alternator belt is loose or worn. Tighten or
replace the belt.
•
The alternator is not charging and must be replaced.
•
The isolator in the charging system is not working properly.
Replace the isolator.
•
A battery is defective and not accepting a charge.
An engine suddenly will not operate at or above cruise
RPM.
•
The engine emergency system has been activated. The on
board computer has sensed a problem and has limited the
RPM to protect the engine. Find and correct the problem.
•
The tachometer is bad and needs to be replaced.
•
A throttle control is not responding properly. Have the
throttle setting checked by a qualified technician.
An engine is loosing RPM. The boat is not overloaded and
the hull bottom and running gear are clean and in good
condition.
•
The fuel filter could be dirty. Inspect and replace the fuel
filter.
•
The electronic engine control system on the engine is mal
-
functioning. Repair the engine control system.
Both engines suddenly shut down and won’t restart.
•
The automatic fire extinguisher in the engine compartment
has activated and the engines were shut down by the ex
-
tinguishing agent. Check the monitor panel for no green
light. If the green light is out, wait 15 minutes, if safe to do
so, to ensure a possible fire is out. Then inspect the engine
compartment. Correct any problems found and then ventilate
the engine compartment and restart the engines.
Summary of Contents for 378SE
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Page 27: ...27 MONTEREY BOATS Operation...
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Page 159: ...159 MONTEREY BOATS Appendix A Hours Date Dealer Service Repairs Maintenance Log...
Page 160: ...160 MONTEREY BOATS Maintenance Log Hours Date Dealer Service Repairs...
Page 161: ...161 MONTEREY BOATS Maintenance Log Hours Date Dealer Service Repairs...
Page 162: ...162 MONTEREY BOATS Maintenance Log Hours Date Dealer Service Repairs...
Page 164: ...164 MONTEREY BOATS NOTES...
Page 165: ...165 MONTEREY BOATS Boating Accident Report Appendix C...
Page 166: ...166 MONTEREY BOATS Boating Accident Report...
Page 167: ...167 MONTEREY BOATS Boating Accident Report...
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Page 174: ...174 MONTEREY BOATS CAUSE AND SOLUTION NOTES...
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Page 184: ...184 MONTEREY BOATS Schematics Sureshade Harness SP SC 115 CONDUIT...
Page 192: ...192 MONTEREY BOATS Schematics 12V Engine Hatch Harness...
Page 198: ...198 MONTEREY BOATS Schematics 120V Hull Harness 54 24 24 30 6 6 6 6 48 MDP3 MDP4 88...
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