The state-of-the-art in sport/competition engines! All FX engines come with remote needle valve – the feature most asked for! A longer crankshaft provides more secure attachment for spinner, prop and nut Dual ball bearing construction adds durability and longevity Semi-square head shape creates more fin area to increase cooling capacity Each engine comes with a high-performance carburetor and muffler with adjustable exhaust direction and built-in pressure tap 61FX and 91FX feature a remote needle valve that can be positioned two ways, to help you avoid cowl [...]

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