Relatively newer lawnmower with little use. Since new, it's always cranked for quite a while before starting. After sitting this winter used starting spray and it started but wouldn't keep running. After several attempts with spray, it finally quit starting at all even with spray. I have spark. I did get a strange sound possibly a backfire once. It seems to have good compression. Grass growing and wife pressing. Any help very much appreciated.

Hello Folks: New to the board. I have a: Craftsman Push Mower 650 Series Briggs Power-Propelled, 22" Multi-Cut & Stratton Engine Electric Start Model No. 917.376240 and guess what, I hit a small root and the engine immediately shut off. What sucks is the mower is brand new. AND I DIDN'T BUT THE EXTENDED WARRANTY. However, I feel confident I can fix this problem. Doing it yourself might produce a headache, but in the end when the project is completed, my wallet will be fuller. I've been looking online and found out that most of the time the part that needs immediate replacement is the key. Well I've taken off the blade and key and everything looks fine. The key has no damage whatsoever. [IMG]http://img188.imageshack.us/img188/1125/1000218lv.jpg[/IMG] However, the drive pulley and belt bracket (which are bolted together) have some extreme slack. Notice the slack in the belt. [IMG]http://img440.imageshack.us/img440/9033/1000215q.jpg[/IMG] I notice a spring on the bottom of the bracket, looks like it needs replacement. Anyhow, can someone point me in the direction to fix this mower? [IMG]http://img195.imageshack.us/img195/6520/1000217q.jpg[/IMG]