Home › Forum › Ask A Member › 1956 Johnson 30hp Only 1 Cylinder Firing › Reply To: 1956 Johnson 30hp Only 1 Cylinder Firing
July 10, 2024 at 6:07 pm
#289036
Have you tried grounding out one sparkplug at a time while it’s idling to see if it’s
firing on both cylinders?
Prepare to be boarded!