Re: '73 mercury 650 3 cylinder water pump lines
The water pump on these engines is driven by the crankshaft, not hydraulic hoses and the outlet is a copper tube that runs up the drive-shaft housing.
Is it a water pump your friends are putting in or a trim pump?
Have your friends ever worked on a boat before? Do you have a factory service manual?
Chris..........
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The world takes on a whole new perspective when viewed from 100' below...

1972 Bertram 'Bahia Mar' 20
2006 Mercruiser 4.3MPI (OW617679) w/Alpha 1 Gen II (OW829301)
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