question about prop pitch ?

[mr_3_0_5]

hello everyone i just bought a boat and it has a 03 suzuki 115 four stroke the boat is a 02 180 key largo the prop size now is a 3x14x21 and she runs 5100 rpm at WOT. what size prop would be suggested on this set up any help would be great..

[Moonlighter]

You should be getting at least 6000rpm at full throttle on the 115, otherwise you'll be lugging too much and that is very bad for the engine.

Get the engine height right first, make sure its not too deep in the water, then drop at least 2 prop sizes to a 17 and see how you go. Best advice I can give other than that is to talk to Ken at "the prop gods", tell him the details of the boat and rpm, and he will advise you of what he recommends. They are the gurus.

Cheers

ML