Logo Max-Prop


Max-Prop is the leading low drag propeller on the market today. Since starting production in the 1970's Max-Prop has proven itself on racing and cruising boats around the world. With over 40,000 propellers in the water, the Max-Prop is tested daily in the harshest conditions and has established itself as the most efficient and reliable low drag propeller.

The combination of low drag, outstanding reverse power, efficient forward performance, and fail-safe design makes Max-Prop the ideal sailboat propeller on the market today. Now with the introduction of the Whisper, Max-Prop has taken a large step forward in the propulsion of sailboats.


Many models of Max-Prop automatic feathering propellers available so you'll be sure to find the one that fits your needs perfectly.

2, 3 & 4 blades
Available from 12" to 23" For 3/4" to 1-3/8" shafts
5 blades
Available from 18" to 44" For 1-1/4" to 3-1/2" shafts
5 blades
Available from 18" to 44" For 1-1/4" to 2-1/2" shafts
2, 3 & 4 blades



One of the most important features of the Max-Prop is that it feathers automatically with the forward momentum of the boat. Once feathered, it provides the least possible drag (similar to a folding prop) improving the vessel's sailing speed by an average of 15% above a conventional fixed blade propeller.


In forward: the Max-Prop will offer 96% of the efficiency of a fixed blade propeller of the same diameter and pitch. The 4% loss in power can usually be eliminated by precisely matching the pitch of the Max-Prop to fit the boat engine combination. In reverse: the Max-Prop provides 80% more power than a comparable fixed blade propeller. The Max-Prop utilizes the same leading edge in forward as it does in reverse giving the propeller the same efficiency in both directions, whereas on a fixed blade propeller in reverse the trailing edge becomes the leading edge therefore reducing its power.



The Max-Prop uses a "differential" type design so that the blades cannot fail to open in forward or reverse. This positive system eliminates the problem associated with a folding propeller and its use of centrifugal force to open the blades. In a recent survey of Seven Sea Cruising Association readers the Max-Prop received a perfect rating on no failures ( one of only two products to receive such high praise). About 32,000 Max-Prop are in operation today!


The pitch setting on all Max-Prop models can be adjusted. Changing the pitch is very simple; it is done by changing the setting of the gear inside the propeller with the Classic (usually upon a haul out). Or by removing a bolt and replacing with one of a different length with the Easy and Whisper. The ability to adjust the pitch will help achieve the maximum efficiency from the engine without having to purchase a new propeller.



A Max-Prop feathers to a low drag shape. Compared to a folding propeller, the extra wetted surface of the Max-Prop blades is offset by the reduction of projected area: A.


The torque of the prop shaft acting on the "differential" type design will open the blades in unison to the preset pitch at any throttle setting. This will provide maximum efficiency (96% of same size fixed prop) plus eliminates the vibration problems of a folding prop.

Max-Prop advantage in reverse


As in forward, the torque of the shaft will rotate the blades, 180 degrees in less than 3/4 of a shaft rotation, presenting the same leading edge and pitch in reverse. This provides better directional control and 80% greater power than a comparable fixed blade propeller.


Want to learn more about our Max-Prop products or how to adjust or install a Max-Prop ?
Check out our Youtube channel for all of our videos.


Crop Image