7.4 mpi, high idle

[Nauti1]

I have a 1998 260 over nighter with 750 hrs. When I first start it it runs fine, wait for it to get to operating temp and go out on it. If I go for a little ride or go for a trip, it always stays around 800 to 850 rpms when brought back to idle which makes for some "fun" docking maneuvers and some grinding on the bravo 3. Could the throttle cable be stretched enough to cause this or something else? First computer controlled mercruiser.


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