Re: 1936 K-80
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February 13, 2018 at 12:52 am
#70955
Sounds like fuel starvation — is the carb bowl full at all times ?
Sometimes older coils have broken wires inside — when they heat up they misbehave … do you still have a hot spark after the motor stops ?
I’ve never been up close and personal with a K-80 — if it has an exhaust cutout are you running with it open or closed ? Closed creates more back pressure.
My K-70 and A-65 suffer from carbon buildup where the engine block joins the leg — it creates a lot of backpressure and therefore exhaust gas hangs around along longer in the combustion chambers.
WRT to the 60 lbs compression — it probably won’t run well with either the cutout closed or clogged exhaust ports.