E5-4Trouble Possible Cause Remedy16. 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 toshift lever position.16. Have serviced by a Yamahadealer.17. Open the air vent screw.18. Have serviced by a Yamahadealer.19. Connect correctly.20. Inspect spark plug and replace itwith recommended type.21. Have serviced by a Yamahadealer.E. Engine power loss.F. Engine vibratesexcessively.1. Propeller damaged.2. Propeller shaft damaged.3. Weeds or other foreign mattertangled on propeller.4. Motor mounting bolt loose.5. Steering pivot loose or damaged.1. Have propeller repaired orreplaced.2. Have serviced by a Yamahadealer.3. Remove and clean propeller.4. Tighten bolt.5. Tighten or have serviced by aYamaha dealer.
