Bonehead Move, now need help

TD_tom

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I have a Craftsman push mower with a Briggs and Stratton 6.5 hp engine. It is about 8 years old and i have never had a single problem with it until today.

Today I got some string caught in my mower blade. I turned it over completely upside down (bonehead move) and that is where my troubles begn. When I turned it back over, The air filter was saturated and the mower would not start. I let it sit for a while, replaced the air filter, cleaned (but did not replace) the spark plug, and got it running again for about 5 minutes before I shut it down. I came back to it about an hour or so later to make sure everything was ok and it wasn't. I had to prime it out 15-20 times (normally 3) to get it to start. The primer bulb seemes to have less resistance when pushed now as well. It would run for about 30 seconds and sputter out, almost like it was running out of gas. The longest I have been able to get it to run for is about 2-3 minutes. There was white smoke coming out of the exhaust, which I expected, but there also seemed to be white smoke coming from other places as well. When it does run it just seems to be weak. I pulled the dipstick and there is oil in it, but it smells like gas, so I am hoping i did not score a piston.

I think the carberatour might be gummed up but I honestly have no idea what could be going on. Like i said I have had no problems until today, when I mad a total bonehead move.
 
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DaveTN

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I'd go ahead and drain the old oil out and replace it. Remove the air filter and also the spark plug and spin it over and see if anything shoots out the spark plug hole. Put a clean spark plug in it and start it first with the air filter out of it to observe if any smoke is coming out the intake. Should smoke a little from the exhaust for a short time then clear up. Replace the air filter. I don't think you hurt it.
 

jekjr

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Probably has excessive oil in the air filter and other places that it is pulling into the carburetor. I also agree it should clear up and run just fine.
 

BWH

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With the less resistance in the primer bulb and the fact of only running for a couple three minutes along with the age of the mower I would be inclined to think that you may have losened up som deposits in the fule tank and now starving it for fuel. You may want to check the fuel flow by removing the fuel line to the carb then check the amount of fuel that will flow. You may have to back blow and flush the tank. 8 years is a long time for deposits to form especially with todays fuel.
 
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