Honda high thrust props

[resynth]

Hi

I have a 2006 Honda BF20 and need a high thrust prop to push a 4ton 34ft sailing catamaran.

I'm reckoning on about 7 knots top speed so thinking a 6 or 7" prop is appropriate?

I have the option of getting a 10x6-1/2 high thrust prop cheap. It is taken from a bf9.9, prop is 58130-ZW9-B22 PROP (10X6-1/2 HT) (Honda Code 7371529). It looks to me like bf8, 9.9, 15 & 20 all have the same size 8 spline shaft, can anyone confirm this?

Is there any other reason why I shouldn't put a prop designed for a BF9.9 on a BF20? (ie built more lightly?)

Thanks for any help
Ben

 

[SaugatuckWB]

They are the exact same props and shafts.

 

[JSL]

for high thrust you need blade area which usually means diameter. Get the engine with the best gearing to swing the biggest diameter prop.
Size does matter!

 

[SaugatuckWB]

10" is the largest diameter prop you can get on that motor. To get more area choose a 4 blade prop, they are available in 7 and 5 pitches probably under a $100 new (Solas)

 

[Sundreamer]

I've used the Solas 4 bladers on the 20's I use to push a 5 tonne cat in pairs. Your biggest problem with the Honda props is spinning the centre out of them. I got mine solid bushed. Driving a nail in will get you home.

 

[resynth]

Thanks for the replies.

I've bought the 4 blade 10x6-1/2 from the BF9.9, hopefully it won't blow it's centre out straight away!

Ben

 

[resynth]

Sundreamer, how do you solid bush a prop so it doesn't spin out?

 

[Sundreamer]

Our local propellor manufacturer does it for me. Henleys Propellors.
They push out the hub and rebed it in resin. I and other multi guys using Hondas found the props spinning out almost immediately.

 

[resynth]

thanks for the heads-up on the problem, I might try drilling and pinning it