Proplem I'm having is if outside air temp is under 70° motor runs great whether the motor is hot or cold, if air is above 70° it's slow out the hole bogging kinda, also sometimes you hit the throttle to come out the hole it hits wfo for about 3 seconds and then goes back to bogging, but once it breaks over it runs like it should, also wont turn more than 5800-5900 rpms, my buddies have same boat and setup and they turn a 27 at 6100 , hp pump replaced, new fuel lines, every thing has been tested to yamaha specs, as per manual, just dont know