Koboldwrangler wrote: ↑Sat Aug 20, 2022 11:28 pm
snip- if it were running really rich on two cylinders id expect it to be running like the choke was on.
"Running like the choke was on" rings a bell for me.
2 years ago I found the choke cable on my trike's engine didn't have enough slack in the off position and the right side carburetors' choke shutters, only, weren't spring returning to a fully open position.
A year or so before my engine's choke issue, I recall another member was puzzling through a plugs fouling issue on one side of his engine. He finally discovered the choke shutters weren't fully opening on that side of his engine.
Wasn't caused by insufficient choke cable slack adjustment though.
May have been the actual problem was discovered under the soft black rubber cap that covers that particular side's fine wire torsion spring?
Done