On my way home from a show, my fuel pump started to vibrate and rattle the lines. Pretty significantly, I just filled the tank with 103 fuel from the track a couple weeks back. Does it sound like the pump has some internal damage? I have a large canister filter. Are these pumps rebuildable? Thanks in advance. Henry

maybe you should do a static flow test where you can hear what is going on and test the flow,flush the system in the same test.i never had a peoblem with my 140 that took me to mid 10,s/129.

Do a flow test... with the noise... something changed...
could even be loose on the mounts

Could be cavitation... try it with a cool fuel system or check for a inlet restriction

It's a pretty simple machine. Pull it apart, check the brushes in the motor, impeller in the pump, etc. FWIW, mine sounded different at idle than cruise.

FWIW, mine sounded different at idle than cruise.

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That would be a voltage difference (most likely)