Question about Parks Optical 13.5hp Briggs And Stratton Intek Lawn Mower Engine

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13.5 OHV B&S won't stay running, blows gas out carb.

I just bought this riding mower, used (mistake #1) from an individual (mistake #2) and paid too much (mistake #3).. I ran it once, it seemed to work well enough. two weeks later, it started out fine and after about 20 minutes, blew a huge blue/white smoke out of the exhaust and no longer developed any power. I looked at the mower while the air cleaner was off and trying to keep it running with the choke mostly closed, it is VERY load pulsing noise from the carb and blowing gas out of the carb. It wont stay running like this long, even manually working the choke and gas feed. The seller has vanished. I bought this mower, because my Toro needed $400 in repairs, muffler and a new sump ?? says the mower shop. This used mower cost $500, thought I was better off :-( Well, now I have two broken mowers and very tall grass! Help!! What could it be? Something repairable?

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Sounds like you have a blown valve. I'm assuming this is a 4 stroke motor, if it was 2 stroke then it would be the reed valves. But either way it's the valves.... unfortunately that will require a mechanic :(

Posted on Jul 19, 2009

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Question? Were you mowing on a steep incline when the white smoke developed? If you were, you may have had the oil level a little high and it got excess oil momentarily in the cylinder. The Spark plug may be just foweled, clean it or replace it and it might run O.K.
>KP

Posted on Aug 03, 2009

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