Home › Forum › Ask A Member › 1956 Johnson 30hp Motor Won’t start But Spark Plugs have Spark! › Reply To: 1956 Johnson 30hp Motor Won’t start But Spark Plugs have Spark!
May 31, 2026 at 11:35 am
#320474
Like others have said, try removing the plugs, squirting some fuel/oil mix directly into the cylinders (do not use starting fluid), to see if the engine will fire briefly.
You mentioned a sheared flywheel key, that is not good. Usually, the mating tapers get galled up when a flywheel key shears. Be sure to properly torque the flywheel nut, you may need to lap the flywheel/crank tapers to get the proper fit. But, if you have spark, then the flywheel key is not sheared now..