Briggs 253707 0155-01
Code: 85020811
This has a briggs one piece flojet. Can't find numbers on the carb but it looks just like this one:
http://outdoorpowerinfo.com/repairs/briggs_large_one-piece_flo-jet_carb.asp
It starts and runs fine but after about 10 seconds starts to spudder and stall. At which point, a huge amount of fuel pours out of the hole in the air intake that leads from the bowl vent passage. Shown as number 16, highlighted in white on the aforementioned website.
I cleaned everything but the main fuel nozel because I can't get it out. There's not enough meat on the slot unless I wreck it and replace it.
This has a fuel pump. I'm guessing my problem is needle / seat related as it runs well for 10 seconds before it starts spitting and spuddering.
This ran fine for a couple seasons after I replaced the fuel pump a couple years ago with this: https://www.amazon.com/gp/product/B000A13FHO/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
The original was rectangular and metal but had failed.
Usually, with gravity type fuel systems, I've had success solving leaking problems with a fuel shut off that I close just before shutting down. But not having experience, I was thinking that a fuel pump puts more possitive pressure on the needle allowing it to flood while running if the needle / seat are not perfect?