My experience running a TT on the TS2 hs been rather disappointing compared to the O.S. or K&B. In stock configuration, the TT doesn't develop the RPMs of the other engines. It is also much heavier. One thing you might want to try is increasing the negative prop thrust and raising the prop. Be sure you have the forward recovery pads glued to the underside of the tunnel when making this adjustment.

Another thing to try would be to make sure the balance point -10"-from the back of the boat is correct. It might take some amount of lead placed inside the cowling and in the lead slot to achieve this balance point w/TT engine.

JD