Test prop good

One question we get all the time is what do I need to do to keep my stainless or aluminum prop in optimum running condition. Other than not hitting something in the water, there is really not much to do. We always recommend removing the prop for overwintering, but that is to protect against theft and from someone hitting their shins on the prop blades when they get too close to your boat! General surface cleaning can be done to stainless if you want to maintain it's like-new shine, but even that is not necessary, A shiny prop is not measurably faster than one a little dulled by use. But it is critical any edge damage, dings, gouges, or bending of the blades be brought to the attention of a local prop repair specialist immediately. They have the tools and expertise to get your prop back in optimal condition. They are not so busy in the off season, so taking that prop for repair after your boat is tucked away is the perfect time to keep a local craftsman busy during the winter.

The relatively flat blades give good performance at those speeds, and excellent take-off performance, but I expected that they would run out of puff at higher speeds compared to the high-helix props like the Bollie and the Kool.  But testing shows this not to be the case, in that at the same manifold pressure settings, the Brolga performed at 86kts, within one knot of both the Warp and the Kool!  The pitch blocks only come in one degree steps.  16º is a bit too fine for cruise, giving WOT 6000rpm, but 17º is over-pitched for best take-off.  Since the Brolga is under-pitched, the rpm for the same manifold pressure setting is higher, but the speed was still the same......  I had expected that this large 4-blade prop would be best at take-off and noticeably slower at such speeds, but it seems not to be the case.......  At WOT it gave 100+ knots, same as all the others, which was really surprising!

Test prop good

test prop good

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