IH 424 Backfires when shut off???

TMRoper1669

New User
IH 424 backfires when turned off. Tractor ran great the other day then died couldn"t get it started, so went through the motions and found bad points. Replaced the points, coil and set timing, now tractor runs ok, but the same but backfires when i turn it off any suggestions?
 
Possible too high of idle rpm or too rich a mixture and is filling the muffler with fuel vapor as it shuts down. Then the heat of the muffler ignites the fuel in one big bang. You might try shutting it down once at a higher rpm and see if it still does it.
 

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