very unlikely you did any damage. Blow out the tell tale (compressed air, WD-40, maybe a thin piece of fuel hose or the snorkel from that WD-40 can). Dunk the leg deep, and don't rev it. Shut it down if no water at the tell tale or exhaust port -- should pump within a few seconds. If feeling really cautious, hook up a flusher with the leg in water to make sure water is pushed up to the head, then remove the muffs and see if it is pumping on its own (tell tale will operate with the flusher if the tube is clear -- if stops when flusher removed, pretty good indicator the water pump impeller needs to be replaced.) OR if really concerned -- if you know the impeller hasn't been replaced in a while or been running in salty or sandy, just replace the impeller before trying it again.
