ACME 1643 4 Blade 13.125" x 14.25" Propeller Hero It has two arms that

ACME 1643 4 Blade 13.125" x 14.25" Propeller Hero It has two arms that It has two arms that extend forward on either side of the engine compartment to add even more weight to the stern of the boat The ACME 1589 4 Blade Propeller will perform up to and surpass the standards you expect from the moment you pull it out of the box and put it on your boat The result was inefficient props with small blade surface area and poor balance which caused vibration in the boat drive train Thanks to ACME's continued devotion to push the ski and wakeboard boat propeller industry to new heights inboard props are helping ski and wakeboard boats achieve performances never before seen