Windham

You may want to check the cables that control the driving wheels.  They may be out of adjustment just enough to cause that issue.  there is alot of vibration on the machine.

Have a Yard Machines Snow Blower with 8 hp tecumseh snow king... when the owners manual says use 5-30w oil, it really means it.  Plus be sure to cover the engine with a tarp.  I live in Maine and a month ago, I got my machine ready for the winter, but failed to cover it, and then it rained, a lot.  Last night I tried to start it, again and again.  So I changed the gasoline and still nothing, I removed the spark plug and it barely turned over with no compression working against me using the pull start.  Last night I went online and read everything I could about issues with starting this engine.  Today, got some 5-30W synthetic oil and went to drain the old oil and nothing came out... so I poked a small screwdriver into the drain tube and found a blockage.  Put a hair dryer on the engine block and after a few minutes, a long chunk of oil covered ice came out.  After about 30 minutes the rest of the old watery oil came out.  I added new oil and it started right up.  Oh, and it never got above 10 degrees here today.  Not my favorite thing to do on a cold snowy day, but I needed the machine to work.  I could have saved a lot of time and cold if i would have paid the $5 for the tarp as soon as i pulled it out of the shed.