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M8000 has trouble re-starting when hot

My 2014 M8000 SnoPro consistently has trouble re-starting when hot.

The machine reliably starts from cold and then runs great, never quits or bogs. But, if I ride for a while (let's say 1 hour or more) then take a break, let it idle down and turn it off, when it's time to get going again, unless I quickly hit the throttle while pulling the cord, it won't start.

I'm talking situations like this in the photo. Up in the mountains, been riding for a while to get there, goofing around....time to move again, no dice.
IMG_0880.JPG
There's often a slight sound of a hopeful start on the very first re-pull, then an immediate quit. After that, I've got to resort to giving it some gas while pulling the cord, which always works, but clearly something is not right in the fact that I have to also hit the throttle.

I've taken my machine to multiple AC dealers and no one can ever replicate the problem, because it only happens after you ride the machine for a while. The issue won't appear if you run it for 15 or 20 minutes, it's only after sustained periods.

I've replaced sparkplugs, reeds, and it has good compression. I run de-icer in the tank, have replaced seals around the intake and everything else seems to be fine.

Has anyone ever experienced this type of hard re-start before and can suggest a solution?
 
I know on my previous Cat 800 the time would vary depending on what you were doing. I just waited until the rpm dropped to 1600 - 1700. If you do a search i think this has been discussed before and there was some good solutions.
 
Have you moved the air temp sensor location?

I did it on my 2013 and never looked back.

Was riding with my brother last month and he had the same issues on his 2013 HCR.
Sent him the video below on how to relocate it and when we went out yesterday his sled didn't have any issues starting after it was warm.
Problem is the temp sensor is located on top of the motor so after riding and coming to a stop the ecu is reading hot temps so it sends the signal for less fuel from the TB.

 
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