I have a 21' CC with a 93 225 johnson and Im running a Rapture 14.25x21. Ive seen on other posts that head temp gets to high at higher rpms. Im having the same problem .When I take it to 5500 rpms (50 mph) my temp gets to about 165-170. When I let of to a lower rpm 4000 or so it cools back down...