Yamaha F6B Ower's Manual

Also see for F6B: Owner's manual Owner's manual Owner's manual

Contents

5-3EE. Engine power loss.1. Propeller damaged. 1. Have propeller repaired or replaced.2. Propeller pitch or diameter incorrect. 2. Install correct propeller to operate out-board at its recommended speed(r/min) range.3. Trim angle incorrect. 3. Adjust trim angle to achieve most effi-cient operation.4. Motor mounted at incorrect height ontransom.4. Have motor adjusted to proper transomheight.5. Warning system activated. 5. Find and correct cause of warning.6. Boat bottom fouled with marine growth. 6. Clean boat bottom.7. Spark plug(s) fouled or incorrect type. 7. Inspect spark plug(s). Clean or replacewith recommended type.8. Weeds or other foreign matter tangledon gear housing.8. Remove foreign matter and clean lowerunit.9. Fuel system obstructed. 9. Check for pinched or kinked fuel line orother obstructions in fuel system.10. Fuel filter clogged. 10. Clean or replace filter.11. Fuel contaminated or stale. 11. Fill tank with clean, fresh fuel.12. Spark plug gap incorrect. 12. Inspect and adjust as specified.13. Poor connections or damaged ignitionwiring.13. Check wires for wear or breaks.Tighten all loose connections.Replace worn or broken wires.14. Failed ignition parts. 14. Have serviced by a Yamaha dealer.15. Specified engine oil not used. 15. Check and replace oil with specifiedtype.16. Thermostat faulty or clogged. 16. Have serviced by a Yamaha dealer.17. Air vent screw closed. 17. Open the air vent screw.18. Fuel pump damaged. 18. Have serviced by a Yamaha dealer.19. Fuel joint connection incorrect. 19. Connect correctly.20. Heat range of spark plug incorrect. 20. Inspect spark plug and replace it withrecommended type.21. Engine not responding properly to shiftlever position.21. Have serviced by a Yamaha dealer.F. Engine vibratesexcessively.1. Propeller damaged. 1. Have propeller repaired or replaced.2. Propeller shaft damaged. 2. Have serviced by a Yamaha dealer.3. Weeds or other foreign matter tangledon propeller.3. Remove and clean propeller.4. Motor mounting bolt loose. 4. Tighten bolt.5. Clamp screw is loose. 5. Tighten the clamp screw.6. Steering pivot loose or damaged. 6. Tighten or have serviced by a Yamahadealer.Trouble Possible Cause Remedy