Yamaha 13.5A Owner's Manual

Also see for 13.5A: Owner's manual

5-3GBTrouble Possible Cause Remedy1. Propeller damaged.2. Propeller pitch or diameter incorrect.3. Trim angle incorrect.4. Motor mounted at incorrect heighton transom.5. Warning system activated.6. Boat bottom fouled with marinegrowth.7. Spark plug(s) fouled or incorrecttype.8. Weeds or other foreign mattertangled on gear housing.9. Fuel system obstructed.10. Fuel filter clogged.11. Fuel contaminated or stale.12. Spark plug gap incorrect.13. Poor connections or damagedignition wiring.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.21. Engine not responding properly toshift lever position.1. Have propeller repaired orreplaced.2. Install correct propeller to operateoutboard at its recommendedspeed (r/min) range.3. Adjust trim angle to achieve mostefficient operation.4. Have motor adjusted to propertransom height.5. Find and correct cause of warning.6. Clean boat bottom.7. Inspect spark plug(s). Clean orreplace with recommended type.8. Remove foreign matter and cleanlower unit.9. Check for pinched or kinked fuelline or other obstructions in fuelsystem.10. Clean or replace filter.11. Fill tank with clean, fresh fuel.12. Inspect and adjust as specified.13. Check wires for wear or breaks.Tighten all loose connections.Replace worn or broken wires.14. Have serviced by a Yamahadealer.15. Check and replace oil withspecified type.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.D. Engine power loss.