Jeff,
I know what you mean about the noise from that old rag of a belt driven pump ; thump thump thump!! Will try to get to it this winter as long as the cash flow holds out. She a fair little Marinette ; concidering she had about a foot of water in the v-berth at one time. Aways something to fix, but use the fool out of her. Thanks for the info. on adding an accumulator tank, sounds like a nuclear plant.

T.N.X. Mark
Trash66

Huck:

That intake might have been used by a generator or the original motor.
That motor looks a lot newer than 1966.
That cap on your raw water intake looks like a galvanized iron pipe and cap.
These should be replaced with either bronze, stainless or marelon clamshell
strainer and seacock leading to a strainer then the raw water pump for the engine.
I would use marelon for its low cost and ease of use but if you use stainless
or bronze, make sure to isolate it from the aluminum hull.
I see from your last pics that there is a san juan strainer and intake hose
so if this intake is not needed you should replace the iron pipe with a stainless plug
wrapped with some teflon tape.