Re: 1964 Evinrude 9.5 Misfire

Home Forum Ask A Member 1964 Evinrude 9.5 Misfire Re: 1964 Evinrude 9.5 Misfire


fleetwin

US Member - 2 Years
Replies: 4737
Topics: 46
#76036

Listened to the video, kinda sounds like it has a bit of an ignition miss to me…Not really loading up so much as misfiring…Maybe it is losing/weak spark on one cylinder that is more pronounced at the lower RPM trimmed all the way in….Doesn’t sound great at the higher trim angle either, although much better than tucked all the way in.
I guess I would start with new plugs, even though the ones you have might be new, doesn’t mean they are any good. Then, I would use either the inline neon testers or a timing light and run the engine when the sun goes down…Perhaps you will see one cylinder losing or with weak spark…