Well its done, i'll hose test it in a few days...I better have gotten it this time!!

Still waiting for results

turns out i did it for nothing.......its condensation and I took boat out for 4 hours today out in ocean oil temp only gets to 180 with the lazer gun i need to do oil temp gauge, i want to run 220 to burn off condensation, valve covers get a little condensation but oil looks ok, changed it once after 2 hour run yeterdat then did some more hours today, runs great about 69mph chine walks bad.

I pressure tested cooling system, it held 18psi for 1 hours.....damn condensation!!

I am new to this site,but not the engine building seen, i work for a engine machine shop. we have in our full size cauiking guns, napa ultra black rtv. we go thru at least 4 a month and never ounce had a sealing issue with it. clean dry proper mounting surfaces and a little trv in the common areas is all you need and cant stress enough proper torque of the fastner and parts putting together.

180 oil temp will burn off condensation,i believe mercury sais 160 oil temp is ok.my oil temp is 175 at 50 mph cruse,at prolonged wot,it will not go over 215.hope this helps.

Is that sensor safe like ultra black?

I've always heard 200+ to burn off condensation. Doesn't 212 degrees fit in the equation somewhere (boiling point of water)?

I wouldn't think you're trying to "boil" the water out of your system per se. It seems to me that getting the oil hot enough to make the water in it want to steam should suffice.

Makes sense. Thanks.