I have a 3 W 80 B2 in a H9 CAP 232. It has a Menz 24-10 Wood prop on it now running 80-1 Amsoil. This is my first venture into gas engines and I don't have any of the paperwork that came with the engine.( I think I am the 3rd owner of this engine). I have 2 questions could I run a 26-8 CF prop on this engine and what would be a good canister set up for this engine.? The only problem I have with the plane as it is is the landing speed my thinking a lower pitched prop less speed. and still have the pulling power without overheating the engine.

I would stick with a wood prop, they're lighter. You can call Cactus Aviation and ask them about the canister set up.

I run a Menz 26-10 on mine. I've seen 6400 on a good day with this engine prop set-up. Standard Johnson in cowl mufflers. This is one of the best running gas engines I've owned. Its very smooth and ultra reliable. I'm the 3rd owner of this engine and I have owned it for 6 years. Mines the TOC version...This motor is really quiet considering the mufflers that I have, the added weight of cannister mufflers with the weight of this engine may add up to something undesireable. I think 24-24.5lbs is about max for good performance with this engine. I'm flying an Aeroworks kit built 31% Extra 300L with this motor, 24.2lbs. Just my thoughts on this...Walt

Mine is just the plain jane one I have no idea what the plane weighs but I would guess it is less than 25 lbs. I agree with you on the quiet issue it has the Johnson mufflers and it is reasonably quiet. I am just trying to stay ahead of the curve on the quiet issue. I don't think it will be long before everywhere we fly will have noise restrictions. I don't have a problem with the wood prop I think the CF ones look good. I put one on my YS 120 AC in a DP ultimate and it ran like a scalded dog. It liked the APC better for t-rolling though.

If you want to run a carbon fiber prop I would go with a Mejzlik 26-10. I tried Bolly's and was no good, 26-8,and a 26-10, the plane lost too much performance. A mejzlik will spool slower but wind up a bit more than the Menz. This may be a better compromise because the Mejzlik will spin quieter...

I think you want to talk to Bobby Wilson at Cactus Aviation. Real nice folks and maybe they can download a manual for this engine.
I use a 26-10 on mine flying a 33% very heavy kit built Lanier Extra and no, I don't have hover ability but it otherwise flies it great. Should have had a 100 in it but they hadn't come out with one at that time.
I've noticed lately that everyone seems to be going back to 40 to 1 oil ratio lately.
And, using Lawn Boy petroleum oil. See what Bobby Wilson recommends but I have gone back to 40-1. I may be mistaken, but I recall Cactus recommends 50-1.

3dbob