Thought you guys may be able to help me. I have a 1998 skeeter 185sx, I had a 150 yamaha but sold it and replaced it with a 200hp 2003 Merc with 19 hrs on it so it is like new. I am using a 10 " jack plate with a 25" trophy running 70 mph on GPS at 5900 rpm. Boat handles very good, no chime walk and turns very well. My problem is I just bought a 25" tempest because I was told it was faster, Well I am running the same speed but I am at 6300 rpm. Someone said I need to lower the moter on the jackplate because the tempest likes to run deeper in the water. Any input would be very helpfull. Thanks in advanced