Re: timing

<However, if the timing is too far advanced the engine will be running hot,
(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 staying 
hot enough to cause the run on.