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Discussion Starter · #1 ·
I am hoping someone can help me out - I have a 1995 7.4L 454 carbed engine w an open cooling system - Went to change my thermostat and when I lifted the housing up everything fell out (thermostat, O-gasket and a plastic like ported sleeve) - Figured I knew how it was set up but now I have no temp reading at the gauge - Looked at the mercruiser installation manual and if the diagram is correct, it looks like the themostat sits on top of the ported sleeve and inserts up into the housing - I had the thermo sitting on the block and the ported sleeve on top of it going up into the housing - Can anyone verify one way or the other?
 
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