Bravo Upgraded Prop Shaft

 Overview :

 Over the past few years PROTECHNOLOGIES has developed a way to reduce propeller slip that thereby increases hull speed by feeding Bravo drives a dose of Viagra. That’s right, PROROC makes a pill that gives Bravo drives a longer, stiffer shaft.  The engorged prop shaft grows to the same diameter as found in the Mercury #VI drive.

A normal Bravo with an HP shaft can only handle propellers that have a smaller overall diameter. This usually limits the selection of propellers to round ear diffuser ringed props.   Once the Bravo is injected with Viagra, it grows a bigger shaft, capable of handling propellers designed for the Mercury #6 drive, allowing for a much larger selection in diameter, pitch, and style. The Big Shaft increases drive endurance and also reduces upper gear case failures, by significantly reducing the vibration of propeller slip. The Big Shaft radically enhances and increases overall life and durability. 

Rolf Papke, of ProTechnologies, designed The Big Shaft and the required internal carrier (see photos). The kit to upgrade one drive is $2495 and if you send him the drive, he’ll do the install for another $250. It appears to be a relatively simple installation after the drive is taken off the boat.