Yamaha 25BMH 30HMH Factory Service Manual, Page 114Get this manual

Yamaha 25BMH 30HMH Factory Service Manual, Page 114

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CONTROL SYSTEM

(7) Check the ignition timing by pointing the timing light at the timing indicator on the starter caseIgnition timing (at full advance) 25B: BTDC 22 30H: BTDC 25 2