Anyone ever had an oil check valve fail???
It started years ago when I noticed very thick smoke on the first start of the year. Each year would get a little worse, until last year...The crankcase was almost full of oil, so much that when trying to start it would hydro lock the motor and oil would spew out the exhaust. I drained the oil and replaced the check valves on each cylinder. One tested bad, so I thought I had the smoking gun. Wrong. Same thing this year, so out the motor came (can't change the check valve on the crankcase without pulling the waterpump, so it's easier just to pull the motor). That valve tested bad as well. Ugh, two bad check valves on one motor, what are the chances?
It gave me a chance to install the Polaris ignition that I have been wanting to try...