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  1. W

    Spark Plug Question?

    I have a 2004 Mercury 3.0L 225 EFI motor. The manual calls for Champion QL77CC plugs. Would it be ok to switch to NGK plugs? Thanks!
  2. W

    Thermostat Question

    I must start out by apologizing for Hijacking an old tread! I have a 2004 Mercury 225 EFI 2 stroke. I think the thermostats need replaced but I don't know there location. I was wondering if I could replace them since the boat dealer is 3-4 weeks out before they could work on it. Any...
  3. W

    Mercury 150XR6

    I bought a 2003 Lund Mr. Pike with a 2003 Mercury XR6 motor. I started out with a Tempest 21 pitch prop but went to a tempest 19 pitch to increase rpms. Everyone says the boat should run 50 - 52 mph. I can't seem toget it above 48.5 mph, with a maximum 5400 rpms. A few recommended raising the...
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