I own this Craftsman Lawn mower for over 6 years, and it's second hand. I used all that time with no problem at all. The whole maintains I did is only changing oil every year and of course sharpening blades.

Yesterday was a hot day and I began experience troubles to re-start engine after it been shut off for a short period of time. No matter what I did, with prime or no prime, the engine wont start when I cranked.

The only way for me to make it fire up, is try to crank it very rapidly, I had to pull the string numerous of times and very fast (up to 20). And it happened each time after I stop the engine (had to stop and clean the bag from the grass). When it finally starts, it were very unstable for couple of seconds, then run perfectly fine, until next stop.

I pull the spark, gap looks fine to me. I see some oil around the air filter, but nothing dramatic. Hope some one can respond to my question, before I get the ticket for not cutting my grass:(.

Thanks in advance.