My idle rpms were at 900, and top end at 3600 when I checked them a few minutes ago on the efi. The engine had not been run today, I've been running the big mower this afternoon. I know the idle rpms were higher on this new engine when comparing to my old efi, because I could tell a considerable difference in sound, and wondered why they were so much higher. They have now returned to about the same as the old engine and nothing has been touched. The only difference being the new engine now has 75 hrs run time, but it makes no sense to me the idle rpms would drop. The new engine is running exactly as the old one, but before, I know from the sound it had to be at somewhere in the 12 to 14 hundred range at least.