My Chaiiii-naaw carb idles my 107 just fine
Perhaps there's some sort of casting material stuck in the idle circuit?
I can't think of anything else if it's a brand new carb.
My Original won't idle without partial choke, but it's got the original carb still. I just gotta get around to cleaning the fuel system up.
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'70 107 with k301 engine swap
'71 106 with 38" deck
'70 147
R with factory replacement k321, 42" deck
'61 Original with 38" timed deck
'63 70 "pinkie"
1863 with 54" deck
'46 Farmall H, '50 Farmall Cub
105 x2 (parts)