Well, after a careful and probably over cautious break in, plus a couple of gallons of sport flying on top, mine is spinning a standard flat tip Zinger 18X6 at 9000rpm. Powermaster 10%, OS #8 plug, it was about 95-100 degrees at the time, slightly humid. I have an APC 18X6W that I haven't tried yet. I expect it will turn it a little faster?

Anyway, a quick question. This engine ran at the same needle settings for a long time perfectly, slightly rich on high end, and slightly rich on low end. Yesterday, for the first time, it had the habit of slowly loading up and dieing at around half throttle or below. I could sense it happening and had to slowly increase to full throttle to prevent from happening, caused two deadsticks. I leaned out the high needle just a tad and the problem seems to have gone away. Do needle setting tend to become rich once break in is complete? Could the low end have anything to do with this, or is it strictly a high end problem?