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    New Mercury Spitfire propeller singing

    Hi all, I took over from somebody else a brand new in the box Spitfire 15" propeller and mounted it on my 2002 Mercury 90 Fourstroke. With forward engaged the prop starts to sing loudly like a finger on the rim of a crystal glass. Reluctant to try over 2000 rpm but when I make left or right...
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    2002 Mercury 90 four stroke low idle after startup

    My 2002 carburetted 90 hp FS (owned from 2010) always drops idle to stalling at startup. First enrichment circuit kicks in and engine starts normal but when enrichment automatically stops the engine has tendency to stall. Normal idle is 850 but when started it drops to abt 500/600 and most times...
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