Another reason for the run on is carbon deposits on the pistons. Do you know
if the pistons are free of carbon? It is more likely that the deposits
retain heat than the spark plugs...
Subject: Re: timing
> <However, if the timing is too far advanced the engine will be running
> (no?) which will promote run-on.....>
> Good point, however my BJ8 runs 180 - 190 degrees (normal range) and still
> likes to run on. I haven't checked but I may be running too hot of plugs,
> which tend to hold the heat rather than disipate it, so they may be
> hot enough to cause the run on.