Magnum Review (Engine West 50V1)
Isaac,
Some engines are designed to "leak" through the bearings for lubrication. I haven't run my West 50 yet so I can't tell you if this is normal. I can say the instructions call for a 9x6, 9x7 or 8x8 prop. The instructions state if you do use a 10x6 to lenghten the pipe 1". This will definately cause a decrease in RPM. Also, make sure your prop and spinner are balanced.
Mark M.