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Tool Talk Discussion Forum

troubleshooting 12.5 twin cylinder Briggs and stra

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Gary Dutchnak

09-07-2004 15:16:05




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Recently, I turned my Bolens Tractor on its side to work on something underneath.When I turned it back over,from that day on, the 12.5 briggs engine leaks oil real bad somewhere up under or around the flywheel when it is running.Can anyone tell me what the problem is. I suspect it is the breather but don't know how to fix it Thanks Gary D

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Jade Peterson

09-07-2004 18:37:39




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 Re: troubleshooting 12.5 twin cylinder Briggs and in reply to Gary Dutchnak, 09-07-2004 15:16:05  
your breather/pcv valve has a rubber hose coming off the carb to it.
take it off and spray the h_ll out of it a blow it dry with compressed air
assemble it back together with (2) new gaskets sandwiched together/there is a little drain hole in the lower corner that must be clear so the oil can drain back into the crank case
if this valve is not working right it will cause pressure not vacume thus blowing oil out of the seals

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