First, WELCOME to the forum!
Vapor in the exhaust could be normal depending on surrounding air and water temps.
A temp of 180° is actually a normal range for fresh water cooled.
How confident are you in your temp gauge?
Do you have access to a temp gun?
Also the "sea water ejector" is called a Water Lift (see pic)
The rest of the crew will be along soon with other ideas and suggestions...
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-Jerry
'Lone Ranger'
1978 RANGER 30
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