Yamaha E115A Owner's Manual page 108

Trouble
E. Engine power loss.
F. Engine vibrates
excessively.
5-3
Possible Cause
14. Failed ignition parts.
15. Specified engine oil not used.
16. Thermostat faulty or clogged.
17. Air vent screw closed.
18. Fuel pump damaged.
19. Fuel joint connection incorrect.
20. 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.
Remedy
14. Have serviced by a Yamaha dealer.
15. Check and replace oil with specified
type.
16. Have serviced by a Yamaha dealer.
17. Open the air vent screw.
18. Have serviced by a Yamaha dealer.
19. Connect correctly.
20. 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.
E