2009 Yamaha F40 Outboard Service Manual, Page 87Get this manual
TRBL SHTG
Troubleshooting
Troubleshooting the power unit (trouble code not detected)
Troubleshooting when trouble codes are not available consists of the following itemsSymptom 1: Specific trouble conditions Symptom 2: Trouble conditions of an area or individual part Cause: The content considered as the trouble factors for symptom Not applicable Symptom 1: Engine does not crankSymptom Starter motor does not operate Cause Checking step Refer to page 10-5 5-1 A-5 5-30 5-31 5-31 5-30 A-5 A-5 5-35 5-34 5-34 7-30 7-51 9-26 8-11
Gear shift not in the position Set the gear shift to the positionBlown fuse Check the fuseStarter relay malfunction Engine start switch malfunction Neutral switch malfunction Short, open, or loose connection in the starter motor circuit Starter motor malfunction Check the starter relayCheck the engine start switchCheck the neutral switchCheck the starter relay input voltageCheck the wiring harness for continuityDisassemble and check the starter motorCheck the starter motor pinionCheck the magnet switchDisassemble and check the power unitCheck the drive shaft bushingDisassemble and check the lower unit