Magnum backfire

[curtisbyrne]

I was driving slow on flat trail for about 5 mins and shut off in neutral and it backfired on start up very loudly with black smoke with it
Why did this happen

[wern]

Unburnt fuel in the exhaust,left over from the engine rotating with spark turned off, being ignited by hot spent exhaust gases.Often caused by a high idle speed.

[curtisbyrne]

Ok because it was really loud.

[curtisbyrne]

once again my argo backfires on shutdown and started fine. and yes i noticed i couldent shift into gear that ewasy this time so how do i idle down? where is the idle screw on a kohler magnum? this backfiring is starting to get annoying.... its not fun when you always expect a loud band on start or shutdown

[North Country Tough]

Although it could be totally unrelated I had three 8 wheelers with the Magnum motors and they were all pretty stone reliable but when I would experience backfires it wouldn't be long before I would have to replace the ignition coil keep in mind I piled hours on and most in the heat of summer but that said the first time I started to get shut down start up the odd backfire I chocked it up to to high a idle not letting it idle to cool and a while later it was a no start with no spark total pain to replace the coil but at least it was externally mounted on the flywheel like a lawnmower,my experience only.Cheers NCT

[curtisbyrne]

i still believe its just my carb idle to high. but will keep in mind.just staying my Argo starts fine so giving me more confidence its not the coil.

[curtisbyrne]

also there was some smoke coming off where the oil breather filter goes as if there was something on there burning/smoking?

[ARGOJIM]

I would start with the carb idle, then adjust the 2 jet settings as per manual, then readjust idle. While you're at it check the spark plug gaps first.
After all this and your test drive allow the machine to idle a few minutes for the muffler to cool some.

[curtisbyrne]

just go back from a hour trip through trail/bog and never backfires once i let it idle 30 seconds to a minute and was perfect. is it normal to have some strange noises when driving for a while like clickking clanking and stuff like that?