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Old 09-01-2011, 10:01 PM
  #5  
Campgems
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Default RE: 4C crank case drain

Magnum 4 stroke of 70 and greater size plumb back to the intake. Ditto for O.S 120s. All of the new designed O.S engines do this internally. It's not a bad idea. Keeps the spit off your fuselage and doesn't seem to hurt performance any.

Don