Z001019/0_8_Octobre 2011 Page GENERAL-23
GENERAL
SERVICE MANUAL MARINE ENGINES
ToC
Trouble Check Chart - continued
SYMPTOM POSSIBLE CAUSE ACTION
Engine vibrates Propeller condition Check for bent, broken, or damaged propeller
Check for weeds on propeller or sterndrive
gearcase. Check for bent propeller shaft.
Unit injector Check.
Engine runs but boat Fouled propeller etc. Check:
makes little or no 1. Propeller for weeds, remove
progress as required.
2. Propeller for spun hub, repair
or replace.
3. Hull for excessive marine growth, clean
as required.
Performance loss 1. System error or failure. Check Engine Management System
display for service code. Engine coolant
temperature; audible alarm.
2. Boat overloaded Reduce load.
3. Boat trim Distribute boat load evenly. Adjust trim.
4. Excessive water in bilge Drain bilge.
5. Boat hull condition Cleaning
6. Improper propeller selection Select proper propeller pitch and diameter.
7. Fuel incorrect Fill tank with correct fuel.
Check fuel filter and fuel flow condition.
8. Throttle not fully open Check throttle command lever for
full travel.
9. Overheating Check cooling system. Remove debris
from water intake. Check belt tension.
Check condition of impeller.
Check for clogged heat exchanger tubing
(in raw water circuit).
10. Air intake troubles Check intake air filter.
Check ventilation of engine compartment.
Excessive free play in Steering cable loose Adjust or replace.
steering wheel
High shift effort 1. Remote control or transom Replace and adjust.
bracket shift cable
2. Remote control binding Adjust.
3. Engine / drive mechanism sticks Center.
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