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  1. J

    1989 Yamaha 225 Intermitent Problem

    While the motor is running at about 4000 RPM it will drop to 3500 RPM by itself. Sometimes it sounds as if it is "surging." I am not touching the throttle at all when this happens. Acts as though I were gunning it and then letting off. It doesn't happen all the time. Any suggestions on the...
  2. J

    Yamaha Compression HELP!!

    I am looking at a boat with an 86 225hp Yamaha Outboard. The motor was rebuilt 25 hours ago with a new crank, powerhead, etc. 5 cylinders are at 110 psi. One cylinder is at 140 psi. What would cause such a high compression rating in one cylinder?? Is this normal?? Thanks in advance for the...
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