390239 OMC TEST PROPELLOR

OEM OMC Johnson/Evinrude 390239 is a Pin Hub Test Propeller with 5-3/4 inch diameter, manufactured in aluminum for performance testing and engine diagnostics. Designed for 6-8 horsepower 2-stroke engines, this specialized test prop provides controlled engine loading during RPM and performance verification. Test propellers are used during engine service, diagnostic work, and factory test procedures.