My trv has begun to backfire, run poorly, and then
die afterer I have plowed snow for about an hour. Once it does this it won't start till its completly cooled down. Then it'll run fine till its completly warmed up again. gain. I put new gas in it, but that didn't help. Then to check for a heat soak problem I sprayed refrigerant on the coil when was running poorly and about to die. Didn't help. I did the same thing for the ecm with no success. Then I sprayed and cooled the carburetor. This stopped the problem for a few minutes. I repeated the same process multiple times, and it sure seems like its a heat soak problem with the carb. I can't figure out what it would specifically be though. If anyyone's got a suggestion I would sure appreciate it

 

may be just as simple as a good carb cleaning.

 

I had a Polaris that would do that when it got hot. The fix was cleaning out the muffler, it was plugged with soot and rust. Is your fan coming on? Radiator plugged? If the carb and jets are clean, maybe turn the PMS screw a turn or so. What does the spark plug look like?

 

Thanks for reponding! I'll check the muffler. Then I'll check the carb. It's pretty new anf had an inline filter.