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I have a briggs and stratton 3.5 HP lawn mower and after 15-20 minutes the mower stalls and won't restart for an hour or so. I have replaced the plug, but to no avail.

Can anyone help with suggestions on what to look for now?
 

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if you have a condensor on your engine, it 's possible that once the failing condensor gets hot, it shorts to ground, thus preventing spark until it cools down. The condensor is a small silver can that's part of the ignition system.
 

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this happened to me it might not seem like it but it is the carb clening it might not help but a new carb will
 

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im tellin ya either clean or buy a new carb it will run fine also is it a craftsman because their yard equipment is usually garbage but their tools r good but anyway i was working on 1 the other day and it had a plastic carburater which is sad
 

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usually those small engines have plastic carb's to make the engine less expensive so it would be nothing to replace them. i had asked one time about replacing an all metal one on a riding mower no resemblance but it was about $190.00 thats why there plastic on those small ones. as for craftsmen mowers yeah there cheap but they have a fix it or replace it warrenty :D :D so if replacing the carb doesn't do it get it checked out
 

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is the mower green cause we had this happen on a green craftsman 3.75 with a b/s and it was the carb also is should be crapsman
 
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Is it a pulsa jet carb or a vacuject carb....sounds like a carb problem but I would not hurry out to buy a new one
 
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