QuestionQUESTION: Hi Eric, question concerning john deere rx-75 kawasaki fc-290v BS02 serial # FC290-060962. Forgot to turn off fuel at end of season,contaminated oil w/ gas. Started engine up and white smoke like crazy, some fuel/oil coming out of exhaust pipe. Drained all oil out and let sit for a day, fresh oil added and run for 5 min, drained oil and refiled w/ new. Started right up, but still smoking like mad (white smoke). No oil in carb and breather pipe seems to be blowing air into carb. Can't seem to locate crankcase breather valve to check it. Looked under valve cover but still can't find it. Maybe blown head gasket? Any help please!
ANSWER: Doubt the head gasket is blown. I bet there is a lot of oily gas in the muffler that is smoking like mad.
Go the the URL below and get the manual:
http://www.mymowerparts.com/pdf/Kawasaki-Service-and-Repair-Manuals/
Check for engine crankcase vacuum.
If you have a leakdown tester, or even a compression gauge, you can get and idea of the internal engine condition.
Eric
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QUESTION: Thank you for your quick response. How do I check for crankcase vacuum? I do have a compression tester and will do a test. I am looking for around 70psi correct?
Answer70 psi might be a reach depending on the age.
The service manual should state the expected compression...there are some differences between manuals but 70 would be good.
There are several methods for checking vacuum. You can use a manometer or a vacuum gauge. Most technicians just drill a hole in a rubber cork and use a vacuum gauge. There are a few videos on You Tube on checking small engine vacuum.
Do you have a leakdown tester? This is the preferred test for checking rings and valves. Handy tool but can be pricey.
Eric
