Powertech LFS 4-blade 16" x 21" vs Suzuki 3-blade 16" x 21.5"
Powertech LFS 4-blade 16″ x 21″ vs Suzuki 3-blade 16″ x 21.5″
Does the choice of the propeller affect our engine’s longevity?
Does the choice of the propeller affect our engine’s longevity?

How does the pitch of the propeller affect the boat’s performance?

By Thomas P. – Vicky P.

It is very well known that every change in propeller’s pitch has a direct effect on the performance of our boat. It is also known that each inch of the pitch «costs» 150-200 rpm for our engine at WOT, a relationship inversely proportional.

As the pitch increases, the load on the engine increases too, since the propeller «grips» a larger amount of water, leading this way to the reduction of its rpm. The reverse happens when we decrease the pitch.

To determine the effect of the propeller’s pitch on the boat's performance as accurately as possible, we tested three exactly same propellers, the only difference of which is the size of their pitch, on a Suzuki 300hp which was mounted on a 930 Marvel rib.

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