I can't provide specifics for the boat but can give some general instuctions based on automotive belts. My engine still has the old style v-belts.
There should be a belt tensioner that has a square pocket for a 1/2 inch drive ratchet. Using the ratchet to relieve the tension, slip the belt off and let the tensioner back into position. The tricky part is remembering the belt routing. Taking a picture and having a print handy might help. Most cars now have a sticker with the routing to help.
I don't know about the sea water pump that is crank driven on the new engines.
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Terry
Current: 07 Crownline 255 CCR cuddy - 350 Mag MPI/B3 "Casi Cielo"
Previous:97 245 Sundowner 5.7GI/SX
Tow vehicle: 1986 GMC 2500 Camper Special 454/TH400
