Hello, I have a Craftsman snowthrower with a Briggs 8 HP engine. The Craftsman model is 536.881800. It has an electric start on the unit. I cannot get it to start. Sometimes, the electric start will spin idle and not turn the flywheel, other times it will catch and will spin the fly/crank but the engine will not start. Sometimes it backfires. I can verify that the carb is getting fuel, and here is a list of the other things I have done to troubleshoot. 1- new spark plug 2-new fuel line 3- replace one/off switch wiring, and verified that safety key is in place 4- removed flywheel and changed flywheel key which keeps timing proper (I really thought that it was a broken key and the timing was off, since I had almost the exact same thing happen with a mower, however the flywheel key was in tact, and this was not it) 5- Verified that I have good compression- appr 120 6- drain and refill fuel tank 7-sprayed the inside of the carb/choke with starting fluid 8- remove carb bowl, cleaned and reinstalled Any idea? Could I have a valve problem? I can pull the pull start recoil, and the flywheel will spin freely. I do feel the compression when it gets around to a certain point. Sometimes, the recoil does not act quite right though, becoming harder to pull, or easier to pull, or snapping back fiercely. Any thoughts at all? The unit is about 5 years old, but is in great shape (so I thought). I use it annually, but only a couple of times each year. I usually put Sat-Bil in the fuel tank and store it indoors over the summers. Please help with any ideas. Thanks

I have a craftsman C950-52677-7. I was using it yesterday fine. Turn it off to do some scooping with a scoop and when back to the blower and the wheels would not turn. If you lift the wheels off the ground the wheels will move fine in all gears, but when the wheels are on the ground there is no movement. Also looking for a manual if anyone had seen one.