Yamaha SX150A Owner's Manual page 103

Trouble
E. Engine power loss.
F. Engine vibrates
excessively.
Possible Cause
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.
21. Engine not responding properly to
shift lever position.
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.
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.
21. Have serviced by a Yamaha
dealer.
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.
5-4
E
Remedy