Z001019/0_7_January 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.
