Same mounting dimensions as the O.S. Max .75FX. Power Box muffler design provides more volume for increased power in a very compact shape. Angular head design offers increased surface area for better cooling. Ball bearing-supported crankshaft. 61C carburetor with diagonally placed needle valve eliminating remote needle valve placement. REQUIREMENTS: Aircraft blend fuel containing 5%-20% Nitromethane with at least 18% lubricant. Propeller, Glow starter and field equipment.
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