Engine wont run corectly ???? Help

[Nailhead]

I have had the engine diesel on shut-off due to a vacuum leak and timing problems.

Mine had a run-on problem yesterday, but after some thought I concluded ignition timing couldn't be at fault because the key was off. Key off = no spark.

[Mikel]

IIRC, dieseling can be caused by too little octanage in the fuel, too rich an idle mixture or an idle that is set too high.

Advancing initial timing allows the engine to idle at a lower butterfly opening, reducing the chances of dieseling. You also get quite better throttle response.

[Don Cavey]

IIRC, dieseling can be caused by too little octanage in the fuel, too rich an idle mixture or an idle that is set too high.

Advancing initial timing allows the engine to idle at a lower butterfly opening, reducing the chances of dieseling. You also get quite better throttle response.

Exactly. Running after the switch is turned off is all of the above. Having the timing more advanced is often the culprit. But I have mine too far advanced, monitor it carefully but have a little more power. Not a recommendation, just "what I do". As Mom used to say, "Don't do as I do, do as I tell you!" (Or words to that effect)