Took me 2 hours to get over 5000rpm. At 4.5 hours they went to 6000rpm. At 5.5 hour I was at 6300. I haven't gone over 6300 and now have 15 hours on the motors. Can you post Mercury Racings telephone #. I would like to call and find out how I can get to 6800rpm's. Is anyone getting 6800. if so, what props?