Homebrewer's advise is good - you should follow it. I have two TT .91's that run with the best of them.

Two things from my experience:

1. Be sure you tighten all of the engine screws as Homebrewer says then check (and adjust) the valves. They are probably going to need it. I did mine (screws and valves) after 1/2 hour on the bench. I then re-checked (and adjusted) the valves after I had flown the engine for two hours. I now only check my valves each year (January) when I replace the glow-plug. I fly year-round here.

2. Make sure you have installed the choke plate on the carb - it is part of the venturi and if you don't install it your engine will never run correctly.

My experience -

Dan