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This O.S. Engine #5 Recoil Starter Assembly is engineered for reliable engine starting on compatible models. The fully assembled unit features a one-way bearing that ensures smooth engagement and disengagement, reducing wear on your engine's crankshaft. Direct replacement for the older OS Max #73002000, it includes all necessary mounting hardware for quick installation. Ideal for RC enthusiasts maintaining or upgrading their nitro-powered aircraft and vehicles. Built to O.S. Engine's exacting standards for consistent performance and durability.