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Need help to find gears ratio in my new boat larson 290 w/single merc 7.4 and bravo III duo props . I'm new w/ this boat and i looking for any information about this engine and outdrive( on alpha one impeller is inside but bravo III?where?)boat is new for me but is 1997.
I have searay 250 mercruiser 260 1987y. Boat losing rpm from 3500 to 2500 after 4min. check everything only y pipe clicking noise on bottom and right side is very hot.something is inside?blocking exost?