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    99 Merc 90 steady warning alarm on cold engine

    My 99 Merc 90 had been sitting up a few months so I decided to run the engine with the water flush attachment. (Something I have done many times). It started fine and after a few minutes I revved the engine in quick pulses to around 3k and back to idle. Suddenly the warning alarm went off on...
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    1999 90 Merc running rough at idle speed

    I have a 1999 90 3cyl merc that was recently serviced. It fires up great and idles smooth. When I bump it into gear, it begins to shutter significantly. Once I give it some more gas, it runs fine. It runs great from there to WOT (5200 rpm without trimming it out too much). I took it back to...
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