cooling issue

[1966starcraft18ft]

Hey guys. Well, after two yrs. the old girl got splashed today. Went well except for it is still overheating. Replaced the lower unit water pump with a kit. Ran great and then we stopped and did some fishing and then started to get warm, so we called it quits. I got home and replaced the thermostat. Still overheating. Does anyone have a diagram on how the thermostat sits in the housing? I put the new one in like the old was oriented.

 

[UncleWillie]

It would help if we knew what engine we were talking about.

Try running it with the T-Stat removed. If it still runs Hot, you're chasing the wrong problem.

 

[1966starcraft18ft]

Oh, sorry. It's a mercruiser 110.

 

[1966starcraft18ft]

When I installed the thermostat, the pointy end is pointing toward the back of the boat.

 

[1966starcraft18ft]

Well, after the boat sitting last night and me going out and gonna dig into it more, believe it is a sending unit issue. The air temp is mid 60's to low 70's and gauge is reading that the temp is 160 on a cold engine.