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  1. R

    No top end

    Also the throttle positioning sensor is no longer available. Typical of manufactures, Had some top officials in Harley Davidson company state concerning old parts for their bikes "We are in the business of making and selling new Harleys, not keeping antiques on the road. Find parts aftermarket...
  2. R

    No top end

    I found the problem. Previous owner had been into carbs, all new stuff inside them & were really clean. But on inspection of float levels that appeared to be correct I noticed metal flange the actual float mounts to seemed bent. They were! Instead of bending the little flange tab that makes...
  3. R

    No top end

    But you are right, should have insisted on a test run in water, but boat is a little different than test run in a car. Buyers beware got me😞😞
  4. R

    No top end

    It is running on all six, just seems to run out of fuel or maybe the YMIS shuts down some of cylinders after it reaches temperature.
  5. R

    No top end

    Racerone, I appreciate your help, I just bought this boat & motor. The motor seemed to run and sound fine. Tell tale was spewing water and seemed to shift in out of gear ok, even took gas fine while on a water hose. It was only after getting it into the lake this acceleration issue popped up. So...
  6. R

    No top end

    The #1 does cause some concern, but don't think that would cause die off of motor. Now the water pump impeller is a very possible suspect as the engine is controlled by YMIS, and if at high RPM not getting enough water could trigger that sensor. Thank you very much for input, I will look at...
  7. R

    No top end

    Have 1989 Yamaha 225 HP V6. Starts & idles great. Will run 2800 RPM @ about 20 MPH with no issues, if given more throttle it runs for a few seconds and motor dies off as if being de-throttled or running out of fuel. If pump primer bulb it helps a couple hundred RPM but only if constantly pumped...
  8. R

    Lack of power

    Have 1989 225 Excel, seems to run fine for short time at 3000 RPM, then engine dies off as if lack of fuel. Squeezing bulb does help, but only some. Compression of cylinders are around 100 & within 10% of each other. Fuel pumps are new, at idle they have about 2 lbs PSI, as throttle is increased...
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