Okay, I had sucked up tons of sand and flushed out everything I could and replaced some parts. The engine that kept overheating now runs at about 100degreesn and the other one that wasnt really affected (or so I thought) will run at 190 at WOT. I replaced both thermostats, maybe the one thats only running at 100 is defective??? Also, isnt 190 too hot at WOT? Thanks for all the help

My MPI motors always ran about 170-180. I believe they have 165* t-stats. I would check the sending unit on the motor that is running cool.

The cooler the water temp ,,the better !!!!!

Oil Temp needs to be at 210-225 !!!!

I would take the thermo's out of both and see what they say !!

They have 160* thermostats.........I thought you dont want it too cool because the computer will dumpp more fuel???

They will also make a little more power then,,,but i don't think u will feel the fuel or the power !!

It is minimal !!

Just to see where the problem lies i would do that,,and if u like the way thry run ,,leave them after u tried it !

Correct,
don't run it without the thermostat.

You could swap the temp gauge senders, or gauges
from side to side to see if the problem transfers.

Or, if you had access to one, use a infra red temp
gauge and check to see what they're running at.