Bravo I LT and Bravo I FS belong to the series of pro-finished Bravo I propellers, each one of which has undergone highly specialized modifications so as to match in specific uses and in hulls with equally specific requirements.
The new HS4 4-blade propeller was launched in early 2017 and is designed for Yamaha outboard engines over 200 hp. With the addition of Yamaha’s Shift Dampener System, it is much quieter and offers smoother operation at low rpm.
During the Olympic 5.90 Speedster test, on the transom of which a Mercury four-stroke 150hp engine was mounted, we had the opportunity to compare two outstanding propellers: the Bravo I FS 15.25" x 21" and the Bravo I XC 15.30" x 20".
Definitely, choosing the right propeller is not as easy as it may seem. Knowledge, experience, patience and of course several sea trials are required so as to be able to choose the most suitable propeller for our Rib.
The Performance Vent System, designed and patented by Mercury marine, is a management system of the exhaust gases that exit from the propeller's tube allowing us to control the venting of the propeller blades in order to optimize the acceleration for quick planing.
It was the first time that two Verado 400R engines were mounted on the transom of the 10 meter Skipper NC 100S and therefore we didn’t know which propellers would fit better to this combination. The only fact we had was that the owner of the boat would like the engines to be mounted high, and that’s why he had chosen their Long version with their Sport Master lower units.
The new racing Pegasus RF 27 S of Top Line and a brand new Optimax 300 XS is a combination with which the Ribadventure team will take part in international races and they were waiting for us at Thermaikos Gulf for our first test.
It was the first time that on the transom of Corsair 29 Racing the new Mercury Verado 400R was mounted, a totally unknown combination for us. We tested the Bravo I 15 ¼ ΄΄ x 26΄΄ propeller, having the Verado 400R at the same mounting height as the 300 XS Optimax, the former engine of Corsair.