This look okay?
 

Hey there, I just bought a few used MP40'S and one of them has a few cracks in the wet side. Attached is a picture, will this be okay for a short time period?

https://uploads.tapatalk-cdn.com/201...3a6703e541.jpg

Corey


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I’d be leery of that. I don’t know how quickly they rust.

I wouldn't trust that either. Any time a magnet is compromised I get rid of it

That was my concern too.

So it looks like I need to upgrade the wetside, correct?

Corey

Short period of time like 24 hours, sure? Short period of time like "I hope I'll get to it soon", no.

Yes, it looks like you need a new wet side. The new MP40QD wet sides are compatible, and are a better design as well. You might be able to find a used MP40 wet side and swap the magnet (it isn't hard), but IME most failures that take the wet side out of service involve a ruined magnet coating in some shape or form (melted, worn through, cracked, etc.) so your odds of finding one aren't as good as if you needed say the impeller or cage.

ETM doesn't list a wet side magnet as a part, but it would be interesting to see if they would sell one over the phone. Purchased used I suspect not, but it never hurts to ask (and report back for the rest of us).

A cracked magnet on an mp40 will poison your tank....

It's not in the tank. I actually hunk it might have been damp when it was shipped to me and then froze. But I don't know, either way it's headed to get replaced

Corey