It would haul it around, but you may want to get ahold of the new 3750 they are supposed to be putting out soon. I had one in a 16# Yak and it flew okay with an APC 20X8 wide prop, pulling about 7250 rpm's on 5% PowerMaster fuel and a Perry pump regulator. I put an MDS 2.18 on the same plane and had unlimited performance.

I would think a Moki 2.10 would be even better, if you can find one. The are reported to pull 20X8W's at close to 8grand. My MDS 2.10 is pulling over 7800 with that prop. Supposed to be around 23# of thrust.

I would think that with the ST3250 your TWR would be about 1:1 with than engine. I am sure you will get some more opinions soon. Good luck, for the money the ST is a really good deal and a nice reliable engine, once you get it broke in and set up.

BTW, There is a terrific post here on RCU about setting these engines up. Following their recommendations, I have found them to be terrific engines.