HH56 wrote:
If the arm itself didn't get damaged or bent, I don't think there is much in the pump that can either.
IIRC, a single stem from the diaphragm thru a relatively small opening which fits in a slot but rests on top of the arm. Has a captured plate that the arm lifts up. If all that is intact -- and surely the mechanic would have seem any problems if not -- then doubt there is an issue.
What about the level in the fuel filter. Is it staying full?
Any puncture or rip of the diaphragm should be finding your oil full of gas because that path would be easier than going thru the filter or being stopped by the float. If you check and all is well with oil level, then doubt any problems there.
Also wondering about the used plunger. Maybe it wasn't in that great a shape after all and couldn't stand being put into service again.
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