420 carb problems

WellWorn

Member
This is a PITA... Neighbor said the float sticks, even after it was "rebuilt" a couple years ago (with low use). I took it off, took it apart, cleaned everything throughly. I checked the float (it does), checked the needle and seat (clean and shiny), and hinge pin (polished). Reassembled and checked it on the bench and it seemed ok, e.g.: I can't blow through the inlet with the carb upside down, but can when 'up', and I can hear the float 'bounce' when lightly shaken, so it isn't sticking on the bowl somewhere. Tank has been cleaned, tank-lined and has fresh clean gas.

Put it on, started it, turned it off and it seemed to hold. Put it to work for about 10 minutes, turned it off, and the gas just ran out of it. Let it sit for about 20 minutes, turned the fuel back on, started it immediately and promptly shut it off, and still dripping, but not as bad. Used it later and forgot to turn the fuel off, and it wasn't dripping at all. And no, it wasn't out of gas.

I'd say it needs a new carb, but it isn't in the budget. Anyone else think of something I've missed?
 

Try to find a needle with a neoprene point. I've had better luck with those seating than the all brass ones. The exception is my 320, which only stopped leaking with an all brass one (go figure...). You could also try lowering the float to lower the gas level in the bowl. Assuming it's not going out plowing, you should be fine.

Adrian
 
Thanks for the reply, Adrian.

This has the metal needle, and while it seemed fine, shiny and all, it might just not work perfectly with this seat, which also looked fine. I'll see what I can come up with for a replacement. I'll also double check the float level. I'm sure there's an answer in there somewhere if I find the right place to look. So glad for this forum.
 

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