Looking for prop recommendations.

[lmorsink1]

Hello everyone! I've recently built a 33" boat with a 3670 motor @ 1550 kv on 6s. I started with a 42mm 1.9 pitch (much too high pitch I now know) and was getting a lot of cavitation. Top speed was also quite a bit less than I was expecting. (Pitch too high, motor cant reach full rpm?) I'm now using the stock prop off a ProBoat Blackjack which I'm unsure of the specs on but cavitation is slightly better with better speed as well.

Which direction should I try going forwards? Larger or smaller? Higher or lower pitch? 2 or 3 blade?

If anyone knows of a good prop starting point for this size of boat and motor rpm I'd be more than happy to try it and report my findings. My boats got a 3/16" shaft.

Thanks in advance
-L

[Bande1]

M645

[fweasel]

Is it a cat or a v-bottom hull?

[lmorsink1]

It's a V-bottom hull, sorry should have clarified.

[fweasel]

I would start with an Octura m447 or an ABC 1715 and work your way up if the system stays cool and your run times are long enough.

[lmorsink1]

Cool thanks, I'll give them a try.