Black chunks found around pump housing - what are they?

[az5oh]

Pulled my 1996 Challenger pump off last weekend in order to change the wear ring (which itself is in terrible shape - see pics) and found this disintegrated black plastic everywhere. Any ideas as to what it is?

 

[racerxxx]

Those are part off the wear ring.......that should be solid. You used every last bit of it, lol. That white should be black too.

 

[az5oh]

Those are part off the wear ring.......that should be solid. You used every last bit of it, lol. That white should be black too.

Thanks, RacerXXX! I bought the boat like this (it's pretty rough) and have been just getting it running again. Since I've got you here, can I run something else by you? In addition to the wear ring, since I'll have the pump pulled apart, what else should I replace? I'm assuming neoprene/foam seal that goes between the pump and the hull, seadoo jet pump oil (or is there a substitute?), but are there any other things too? Impeller appears to look pretty good in my opinion.

 

[Gary pope]

Every time I pull the pump off I slap a new set of bearings and seals in it just for peace of mind