Hi Folks, New to the site and glad I found you guys. I have a 1980ish crary bearcat 824 snowblower with a techumseh. Purrs like a kitten and will throw the snow a longs ways. The problem is it will no longer drive like it is supposed to and I am clueless. It used to drive real well and pretty fast in 5th gear but no longer. When in gear and the wheels off the ground they will turn but not real fast and I can stop them from moving with my hand. On the ground I get nothing. Need some advice before the snow flies. Also, i'm not as smart as I look so terminology will not be my strong suit right away. Talk to me like you would a 2nd grader. Thanks in advance.