250-500cc looks like my 07 WR250 has a foamy milk option :P

Still going through my new-to-me wr250.
It has issues, which the most recent is a milky substance coming from the case breather.
I don't have a 23mm socket to pull the drain, so that will have to wait until tomorrow.
I will be pulling the pump cover tomorrow, but have already started researching water pump seals.

Does anyone know where I could find one?

Thanks

Found a seal kit on ebay.

Other then the reverse threads on the impeller, any other pointers I should know about?

​Pulled the pump.
I was able to remove the drain-plug with a crescent wrench, couldn't find a 23mm socket locally.
Milky, Milky, Milky.

I noticed the drain-plug was kinda ruff, since it's made out of aluminum.
I carefully filed the edges, reducing the outer size to fit snugly with a 7/8th socket

Now back to the water pump seal.
I was able to pull water pump cover, impeller, spacer and seal.

Didn't find the o-ring behind the spacer....or maybe item #3 is the seal?
​

Here's a close-up of the seal.

Hi, your impeller doesn't look very healthy, I would try to find a new one if you can.
That part #3 is in fact an O-ring that goes behind the bushing:



OEM reference is: H800034083 , it's a standard NBR O-RING 2031 7.66X1.78 mm
The seal itself is reference H800038215

https://shop.italhusky.com/en/products/2007/wr-250-1/crankcase-covers-48

I wrote up the process when I did my engine, maybe you could find something useful there.

Regards.

Outstanding thread.
Thanks Hurky

Yup, going to replace the impeller.
I may have a local machinist make one...wish me luck.

Picked up water pump impeller from machinist.
I think it came out better then OEM