Got It!
Borrowed a scanner, took it out Sunday, set the TP sensor and the IAC valve - motor idled at 675 instead of 800, in and out of gear.
Fuel pressure is set at 45, according to ASM specs, plugs are a little rich, plan to try reducing fuel pressure and try again.
Thanks to all for all the help

Whereis the IAC located? My 6.2 takes 3 or 4 seconds to return to idle if I rev to 1000 rpm.

Great Job hondatv. I don't know everything about this stuff, but this is a great place to find the right answers. I'm glad you got the problem resolved, now for a good boating season.