Originally Posted by 1000 islander

Ok, talked to a buddy who is a great marine mechanic/Mercury tech and he told me the thermostats definitely go under the brass sleeves and that all mine are wrong, so I will correct that. These look to have been like this since I have owned this boat (4 years). What no one can tell me is if this will cause an increase in water pressure. I guess I will know soon enough as I ordered three new brass sleeves and three sets of gaskets and I will change it all this week.