BF135A•BF150A d. IGNITION SYSTEM • ENGINE IS HARD TO START * Before troubleshooting, turn the ignition switch ON and check whether the MIL comes ON for 2 seconds and the warn- ing buzzer sounds twice intermittently. If the MIL does not come ON or the warning buzzer does not sound, perform power system troubleshooting (P. 2-20). NO Check for short in the wire harness of the No. 6 (10A) fuse load line. Replace or repair the wire harness as necessary. Replace the No. 6 (15A) fuse. NO Set the clip securely. NO Replace the spark plugs. YES Wet fouled spark plugs. YES Replace the spark plugs. NO Replace the emergency stop switch. YES Replace or repair the wire harness. 2-25 Check the No.
6 (15A) fuse. Is the fuse normal? Y ES Check whether the emergency stop switch clip is disconnected. Is the clip set securely? Y ES Measure the spark plug gap. Standard plug gap: 1.0 – 1.1 mm Service limit: 1.3 mm Is the spark plug gap within the service limit? Y ES Clean the spark plugs and install them. Start the engine according to the starting procedure. Does the engine start? N O Install the new spark plugs and restart. Does the engine start? N O Check the emergency stop switch. Is the emergency stop switch normal? Y ES Check for short in the black/red wire of the emergency stop switch. Is there continuity between the harness side black/red terminal and the black ter- minal? N O To P.
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