QuestionI have a question maybe someone here can help with , I have a 14.5 Hp B&S motor on my tractor Mod# 287707 Type 0224-01 Code 9705012DI. Its been a good motor , Last fall it started to blow oil and gas up through the Carb. from the C.Case vent box .
I pulled that off and cleaned it looked fine , So I also adjusted the valve lash ran great for about 15hrs . Today it back fired again I removed the valve cover and lot of oil and gas drained out.
I set the valves again . But noticed that when I cranked the motor it was blowing gas past the push rod side .Pulled the head gasket looked a little flaky between the piston and that intake area from the carb. Piston walls look fine piston will push my hand off the top when I compress it .
Just not sure if this blow by is normal in that area ? I don't recall that when I set the valves a few weeks ago. It like I mentioned it was running great made that pop sound and died ): Any ideas or help will be greatly appreciated
AnswerDid the valve breather rattle like a baby rattle when you shook it? You are listening for the valve disc...it should be loose enough to hear it rattle.
Is one or both push rods bent? Roll the push rods on a piece of glass to see if they wobble.
Make sure the dipstick o-ring and dipstick gaskets are sealing...not leaking air preventing crankcase vacuum.
Eric
