engine won't shut off

[truant]

Our (completely stock) 715 won't shut off properly; it diesels something awful. Timing's set to 5 degrees. Thoughts?

[MrNeutron]

I had no idea that these low compression engines could "diesel". I would check the ignition switch, maybe it's still allowing some voltage to get to the coil.

[Barrman]

The 230 does that often. Not trying to be insulting, but are you sure the timing is set at 5°? If so, then what is your idle at. Slow it down just a tad and the problem should go away.

[NOLA5Qtr]

Mine does it too occasionally. Especially if it hasn't been driven much. In periods where i drive it a lot, it rarely does it. Not sure if its caused by a build-up issue or not. Guess its just one more of the quirks.

[kwai]

Check for vacuum leaks. Mine does it when the vacuum hose to the windshield wiper switch comes off. Note that I have a regular fuel pump and not the std m715 pump with the separate vacuum pump. But leaking hoses can cause it to diesel.

[Mikel]

The 230 does that often. Not trying to be insulting, but are you sure the timing is set at 5°? If so, then what is your idle at. Slow it down just a tad and the problem should go away.

More initial timing would require a lower idle too, which should help with the dieseling.