Yamaha F200B Owner's Manual page 106

Trouble
E. Engine power loss.
F. Engine vibrates
excessively.
Possible Cause
1. Propeller damaged.
2. Propeller pitch or diameter incorrect.
3. Trim angle incorrect.
4. Motor mounted at incorrect height on
transom.
5. Warning system activated.
6. Boat bottom fouled with marine growth.
7. Spark plug(s) fouled or incorrect type.
8. Weeds or other foreign matter tangled
on gear housing.
9. Fuel system obstructed.
10. Fuel filter clogged.
11. Fuel contaminated or stale.
12. Spark plug gap incorrect.
13. Poor connections or damaged ignition
wiring.
14. Failed ignition parts.
15. Specified engine oil not used.
16. Thermostat faulty or clogged.
17. Fuel pump damaged.
18. Fuel joint connection incorrect.
19. Heat range of spark plug incorrect.
1. Propeller damaged.
2. Propeller shaft damaged.
3. Weeds or other foreign matter tangled
on propeller.
4. Motor mounting bolt loose.
5. Steering pivot loose or damaged.
1. Have propeller repaired or replaced.
2. Install correct propeller to operate out-
board at its recommended speed
(r/min) range.
3. Adjust trim angle to achieve most effi-
cient operation.
4. Have motor adjusted to proper transom
height.
5. Find and correct cause of warning.
6. Clean boat bottom.
7. Inspect spark plug(s). Clean or replace
with recommended type.
8. Remove foreign matter and clean lower
unit.
9. Check for pinched or kinked fuel line or
other obstructions in fuel system.
10. Clean or replace filter.
11. Fill tank with clean, fresh fuel.
12. Inspect and adjust as specified.
13. Check wires for wear or breaks. Tighten
all loose connections. Replace worn or
broken wires.
14. Have serviced by a Yamaha dealer.
15. Check and replace oil with specified
type.
16. Have serviced by a Yamaha dealer.
17. Have serviced by a Yamaha dealer.
18. Connect correctly.
19. Inspect spark plug and replace it with
recommended type.
1. Have propeller repaired or replaced.
2. Have serviced by a Yamaha dealer.
3. Remove and clean propeller.
4. Tighten bolt.
5. Tighten or have serviced by a Yamaha
dealer.
5-3
E
Remedy