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Marine gearbox spares and replacement gearbox parts for ZF Hurth gearboxes. If you own a marine engine, then the chances are that you have a marine gearbox bolted to the back of it. Unlike a standard car gearbox, most marine gearboxes are single ratio only, offering the means to go ahead (forward), neutral, or astern (backwards). Speed is usually controlled by the engine revs.
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