Always had some gas in it and used to start it every now and then, the assembly has cleaned up nicely, that yellow stuff is just like a fine powder few wipes and it is gone
Be very wary of those cheap Ebay Chinese fuel pumps. Myself, I would pay up for the oem or a known quality brand product. Nobody wants a premature fuel pump failure and the grief it can cause...
Yup, my original John Deere fuel pump lasted 20 years, then 2 Chinese pumps in 2 years, well, that was a lesson, back to OEM 5 or 6 years ago, still going strong.