Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 78Get this manual

Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 78

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INSP ADJ 3 1

9 Spark timing

Beyond the firing range(dent on rotor) Check the ignition system or replace ignitor ass'yChecking steps: Warm up the engine and set it at the spec