B & S 10.5 IC on a Toro 32 walk behind model 28B702 type 1041-E1 code 000712ZD I have searched the forum for possible causes and repair for this problem and I have a few ideas but I am hoping I can narrow it down with this post. I have been registered to the site for a few months but this is my first post. It has been getting harder and harder to start this engine and now it won't start at all. Engine was not running smooth either. This has been going on for about a month. I noticed also that if I engaged the blades too quickly the engine would stall out. I had to ease the handle down to keep it from stalling. If my hand slipped off the bail for the kill switch the engine backfires. New spark plug and cleaned the carburetor but I don't think it is a fuel problem. If I squirt gas or starter fluid I get nothing. Couple puffs of smoke from the muffler but that's it. I can see spark on the plug. I checked the compression and it goes no higher than 30psi after several pulls on the cord. I don't know what it should be. Reading through the forum I am thinking it may be a valve problem. Any help from you guys would be great.