Toro 6.5 hp (B&S) front self propelled lawn mower. Just over three years old. Has been running great. Changed the plug last summer. About two weeks ago, it wouldn't start. Pulled the plug, cleaned it with a wire brush (seemed a bit oily to me) put a little fresh gas on the plug and it still wouldn't start. Thought maybe I had flooded it. Let it sit for quite a while and it still wouldn't start. The pull cord won't go back in all the way unless I ''coach'' it with short tugs. Just doesn't seem to want to fire. Once in a while it will ''tease'' me like it is going to fire but it won't. I will go get a new plug and try that. Any ideas?
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It seems to be an obstruction in your fuel delivery system. Get a can of ether and a spray a short burst of it into the breather area near the carburetor, if the mower starts up and then stalls out, then you may need to get your carburetor serviced.
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Sounds like a low compression problem. The piston rings have most likely failed and oil is seeping past them and burning, thus the white smoke. An engine needs three things to run...Spark, Compression, and Fuel. Just take the mower back as it is still probably under warranty. Mike. Rate 100% please.
Your self-propel is probably belt driven. Belts can make an awfully lot of noise when unhappy. Possible it has rolled over and is running on the wrong side of the belt or is worn and just needs replaced. Hope this helps.,
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