Reply To: 1956 Evinrude 15hp Throttle Q and Fouling

[Don]

It is kind of hard to avoid having the plug wires rub/jam on that bracket at WOT, just the way it was designed….The minor wear shown in your pictures does not look like an issue and would most likely affect the engine at that WOT position before slow speeds. I don’t really understand your description what you are seeing under the flywheel inspection plate, perhaps just one coil was replaced, older coil primary leads had the fabric cover wire you mentioned. Did both coils look identical?
I don’t want you to rip this ignition system apart needlessly, you really need the OMC puller to get the flywheel off, something I’m assuming you don’t have. I guess my next step would be to use the neon inline testers to see if the lower plug is actually fouling, or if you are losing spark to the lower cylinder. It is best to do this testing during sunset or sun up so the neon testers are easier to see…