Yamaha 25BMH 30HMH Factory Service Manual, Page 394Get this manual

Yamaha 25BMH 30HMH Factory Service Manual, Page 394

Quality of the image is intentionally reduced!

IGNITION SYSTEM
CHECKING THE IGNITION SPARK GAP
WARNING Do not touch any of the connections of the spark gap tester lead wires Do not let sparks leak out of the removed spark plug cap Keep