Saito 100; One way compression
07-22-2015, 01:10 PM
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Saito 100; One way compression
This Saito 100 has strong compression when turning the prop clockwise, and little compression when turning the prop counter clockwise.
What should I do?
This engine has run very well. After break-in, it was mounted, sideways, and using muffler pressure and a cline regulator (because the tank position was low).
It has been flown about 10 times in two years. !5% nitro Wildcat with 18% oil.
I was readying the plane to fly and noticed one thing wrong: I had put a fuel line plug in the crankcase drain line. I don't know if that occurred when I last emptied the tank after flying, or if I had flown it that way. (With a Cline regulator on muffler pressure, you must plug the fill line and the vent line for running the engine and flying.)
I am skeptical that the engine would have run well if I had the drain line plugged during flight, but I can't say for certain.
I suppose this problem of "one way compression" is related to valve opening and closing, but I would appreciate guidance.
What should I do?
This engine has run very well. After break-in, it was mounted, sideways, and using muffler pressure and a cline regulator (because the tank position was low).
It has been flown about 10 times in two years. !5% nitro Wildcat with 18% oil.
I was readying the plane to fly and noticed one thing wrong: I had put a fuel line plug in the crankcase drain line. I don't know if that occurred when I last emptied the tank after flying, or if I had flown it that way. (With a Cline regulator on muffler pressure, you must plug the fill line and the vent line for running the engine and flying.)
I am skeptical that the engine would have run well if I had the drain line plugged during flight, but I can't say for certain.
I suppose this problem of "one way compression" is related to valve opening and closing, but I would appreciate guidance.
