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  1. M

    Yamaha 200. Can I mill cyl heads?

    A 1996 Yamaha 200 HP. A break in the head gasket allowed blowby gasses to erode some of the metal on the head. My question is: Can these heads be milled? and if so how much? It appears I only need about .5 mm to smooth the head. I can't find any milling specs in the manual. Any assistance...
  2. M

    Jack plate problems

    The hydraulic jackplate used on my Yamaha 200 makes a severe grinding noise going both up & down. The problem had gotten worse over about 6 months. I have rarely used it. My first suspicion is that it is low on hydraulic fluid. So the question is: What type of fluid might be used in this...
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    Getting water in one cylinder, 200 HP Yamaha

    It appears that water is getting into one cylinder of my 200 HP Yamaha ('96 model used in salt water) Even a new plug will foul after several hours of running. It is the top plug on the port side. All of the other plugs look OK.<br /> I have had this boat for 9 months now. It worked fine...
  4. M

    200 HP, Yamaha one fouled plug

    .. A set of plugs only 6 months old. The upper port plug completely fouled with brownish deposit. all of the other plugs are fine. Could this be a leaking head gasket? Bad coil? Any suggestions would be appreciated.<br />Thanks!
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