Monterey Boats Sport Yacht 330, Owner'S Manual

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330 SPORT YACHT
TROUBLESHOOTING
GUIDE
PROBLEM
CAUSE AND SOLUTION
PERFORMANCE PROBLEMS
Boat is sluggish and has lost speed & RPM.
The boat vibrates at cruising speeds.
ENGINE PROBLEMS
An engine is running too hot.
An engine alternator is not charging properly.
• The outdrive may need to have marine growth cleaned from
hull and running gear.
• A Propeller may be damaged & need repair.
• Weeds or line around the propellers. Clean propellers.
• Boat is overloaded. Reduce load.
• Check for excessive water in the bilge. Pump out bilge, then
fi nd & correct the problem.
• One of the throttle adjustments has changed and the engine
is not getting full throttle. Adjust the throttle cable.
• One or both of the engines is not producing adequate power.
Have engines checked by a qualifi ed technician.
• Propeller may be damaged & need repair.
• A propeller shaft is bent. Repair or replace damaged
components.
• An outdrive is fouled by marine growth or rope. Clean
running gear.
• The outdrives are not trimmed properly. Trim outdrives.
• The engines are not at the same RPM. Synchronize throt-
tles.
• 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 freshwater 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.
• 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.