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I just finished doing a full rebuild with a new crank, cylinder and pistons in my 2019 Polaris rmk pro 850 snowmobile. I went to try and start it and it was insanely hard to pull and kept snagging and didn't feel good at all but after a few tries it started up and sounded really good idling for about 30 seconds then I shut it off. I tried to start it again and it was was still very hard to pull wand kept snagging and really had to muscle it through the snags to get it to go but once it starts it sounds good. Does anybody have any ideas why it is so hard to pull? Thank you