Thru Hub Exhaust - Flaired End

[JohnsonM50]

Cut the flare off. I have been doing it for years on all the hi-speed Bass Boats. It picks up a couple miles an hour. A lot of the new props don't have the flare. Why put up with the flared drag in the water not to mention rotating weight.

That might work with the actual flaired props but the diffuser ring OMC types are best left alone unless you want to experiment with an extension pipe of a couple inches. If rotating weight made a big difference we'd all be using comp-props

[Rapid Racer]

What we ended up with was some (not all) of the rings removed from one prop guy and the others left on by another. With no real way of testing them we don't know any before-after differance. The ones from the second guy were the fastest easily, but we smashed them both pretty good.