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Message: <blockquote data-quote="Pappy" data-source="post: 469585" data-attributes="member: 3278">I cannot think of a single difference in those two basic engines that would make a difference in the magnet location of the flywheel. Secondly, if the magnet locations were different the timing would be different. Have a timing light? Use it. Third, the flywheel would give the same exact characteristics every single time you start the engine. It would not "settle down" as the engine warmed up. "Coughing fits" are most commonly caused by a lean engine, vacuum leak, low float level, etc. Those characteristics will change a bit with engine temperature but static timing will give the same issue each and every time. </blockquote>