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  1. #1
    Pat Lincoln's Avatar
    Pat Lincoln Guest

    Default "2000Mercury 90hrp 4-stroke.

    "2000Mercury 90hrp 4-stroke. New plugs, right gap.Cranks right away, Idels with engine shaking, but does not go dead, just rough. Put the throttle all the way and it runs fine."

  2. #2
    Join Date
    Jan 2008
    Location
    , Victoria, Australia
    Posts
    157

    Default "idle air mixture screw, find

    "idle air mixture screw, find it on the carb, wind it in fully then 2.5 turns out anticlockwise and see how it goes, if it stalls or runs rougher wind it in half a turn, if u get to 1.5 turns back in and it is still running rough and it hasnt changed the sound or smoothness of the engine you may need to remove the carb as it may have blocked slow idle jet and needs attention."

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