Clutchless adapter designed to fit on all Zenoah 23-25 cc marine engines. This adapter utilizes the common 1/4" square ended drive cables. This method of cable coupling has become the industry standard. The square end can float loosly into the receiver and all thrust can be transmitted into the thrust washers at the drive end rather than the crankshaft of the engine. This limits pre-mature engine wear caused by excessive crank thrust pressure.