E5-4Trouble Possible Cause Remedy19. Fuel joint connection incorrect.20. Heat range of spark plug incorrect.19. Connect correctly.20. Inspect spark plug and replace it withrecommended type.E. Engine power loss.F. Engine vibratesexcessively.1. Propeller damaged.2. Propeller shaft damaged.3. Weeds or other foreign matter tangledon propeller.4. Motor mounting bolt loose.5. Steering pivot loose or damaged.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 aYamaha dealer.