The power and sailing performance of your propeller is all
that you claim, and EXCEEDS OUR EXPECTATIONS.

Ralph Krueger


  • Efficient power
  • Outstanding reverse
  • Ultra smooth operation
  • Low drag
  • Externally adjustable pitch (no need for a haul out)
  • One piece installation (can be done easily in water, no need for a haul out)
  • Ideal for heavy displacement cruiser wanting the extra power and smoothness of a 5 blade
Instruction manual
Video instruction
Price list

12” a 47”



The MAX PROP WHISPER uses five blades to provide quiet operation and impressive thrust. Especially against heavy wind and seas, the fifth blade will maintain boat speed on a heavy vessel. Also, the fifth blade provides a smoother operation quieting down propeller noise on larger applications.

The WHISPER is based on the EASY design, so it ships fully assembled, making installation and pitch changes simple and fast. The pitch is adjustable, providing the ability to fine tune the loading of the engine. Moreover, pitch adjustment can be done in the water as the propeller does not need to be disassembled to change the pitch.
On the body of each propeller two threaded holes (housings) are obtained, marked with letters “R” and “L”; a screw/rod is inserted in each hole. The pitch of the propeller, for both forward and backwards motions, can be easily varied by changing how deeply each screw/rod penetrate the body

A series of equidistant grooves are carved in the head of each screw/rod. These grooves have dual capacity: locking the screw/rod in the selected position by fastening it with a threaded grub screw, and precisely defining the value of the rotation angle of the screw/rod, when switching from fastening in a groove to fastening in the next groove. All the propellers have been sized so that, by one complete turn of the screw/rod, the corresponding pitch of the propeller varies by four degrees. Therefore, since there are eight grooves in the head of each screw/rod, by shifting the locking of the screw/rod from one groove to the next (i.e. by a single groove), the propeller pitch will vary by half a degree.

The WHISPER is designed for larger moderate to heavy displacement vessels. Which can benefit from the extra thrust and quiet performance of a five blade propeller.
Very helpful also in applications where the propulsion system has very reduced space.

MAX PROP Shop on
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Viale Carlo Espinasse, 101
20156 Milano - Italy
P.IVA 07610270154