G5200 (D600) drain cock valve thread pitch

[dlundblad]

I didn't find a thing online about this so I figured it was worth posting up in more detail. Mine ended up snapping off from the block when I tried removing it during a coolant change.. So lesson learned, use a drill bit, long pick etc. before resorting to removal.

P/n is 15841-73020. About $9 for the Kubota part.
Thread pitch is 1/4"-18 NPT.

This should apply to any G3200 to the G6200 as well as the next generation G1800, 1900 etc. Hope this helps someone.

 

[Steve Corgan]

I wish I would have seen your post before breaking my drain cock off while attempting to remove it. I have the new part now, but I'm confused about the thread size. I want to have the tap on hand before trying to get the piece out of the block. I saw a post on here somewhere that said the thread is 1/4" x 18 BSPT and not NPT. I'd never heard of British Standard Pipe Thread before. Now, I can't find that post so I'm unsure. Can you clear up my confusion? Will the NPT tap work? Thanks, Steve

 

[HamBandit]

I can confirm that you can chase the threads with 1/4"-18 NPT tap.

Both the 1/4 NPT brass plug I bought and the OEM Petcock would fit