I am just now running in the motor. Lot of firsts today... First 4 stroke. This has more power than my ST 75, and it sounds like something else... And I have only run 1 tank through it so far. With it tethered on the ground, at about 4k rpm, it wants to pull up already. That's about 1/4 throttle. The top end is supposed to be 11k, do I set the mixture after the 4th or 5th tankful so that it max's out at about 10.5 at full throttle? I can see now exactly what throttle control really means...

After an hour of running, so far I have settled it in at about 9900 rpm, it seems to have plenty left, I just don't want to overlean it. After I fly it some, I can always run it up a little. Amazed at how little gunk I got on the plane after 4 tanks, getting about 16 min. of run time on the last 2 16oz fill ups.. I can get good transition with an idle of about 2200, according to my tach.

Bruce Tharpe suggests a metal spinner, I would have to second that now..