Posted by John in Mich on November 22, 2022 at 16:56:35 from (68.37.52.168):
In Reply to: Spark plug fouling posted by rrlund on November 22, 2022 at 16:40:58:
I'm not familiar with the Oliver 1600 (I'm a Ford N guy) BUT, my experiences with fouled plugs mirror some of your trouble. First, I would want to know current compression readings as compared to original specs. Second, I would verify timing. Third, install new hotter range plugs. Forth, with the engine properly warmed up, I would set carb as lean as I can but still not stumble when I smack the throttle to wide open. That may take several tries. AND fifth, most importantly, I never do short runs on the engine. The low led gas will foul cold plugs (cold engine) quickly. It sounds to me that your #6 cylinder never gets up to a good operating temperature. Others may chime in with information relative to the 1600 or their personal experiences.
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