The pump is much noisier when idling on trailer but quiets down with a little throttle application. I have two of these skis, and this ski is much slower to accelerate and has a top speed about 4 mph less than the one with the normal sounding pump. Engine runs smooth but it seems to be cavitating off the line, or like it was pulling a heavy load. Is this a bad impeller, bearing, pump housing or what? Is there a pump rebuild kit that would likely fix the rattle and slow acceleration? I am attaching a video of the idle rattle. Any helpful input is appreciated!
noisy pump video
noisy pump video