Thread: Help! O.K Cub 074
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Old Sep 15, 2012, 09:09 PM
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OK 1/2 A engines have a very short intake venturi so they don't have great fuel draw suction. If you use a separate fuel tank, you need to have the fuel pickup tube on your tank at the same level as the needle valve and as short a fuel line as possible, tank vent lines should be open. You should launch with the needle valve set so that engine is running slightly rich ( less than max rpm). Engine will lean out in the air and hopefully run out the tank. If you use a built-in tank, make sure it doesn't leak fuel or air. Might have a gasket missing.
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