620 carb problems!

Best Wishes God Bless the USA Ol John T Nordhoff

~Next, unscrew the knurled nut on top of the tank fuel shut-off, then open the carb bowl drain, then hold that knurled nut down & make sure you have a pencil sized steam of fuel flowing for 30 seconds plus. [if not, find out why or post back]

~If all ok per above try opening the load needle [in the center of the bowl nut] 1/2 turn more at a time & see if that helps, open 1/2 turn at a time until it is open 2-3 turns more & see if it gets better.

~If still no better, pull the float bowl & look for rust in the bowl, then pull the main metering nozzles from the bottom of the main wells & make sure all the little side holes are open [common problem].

~If still nothing found post back for other options.

~I presume it ran ok after the carb clean out & just lately got worse? If it has always been bad since the carb work, post back for different places to look.

~You should probably start with the easy things like the fuel flow test, then try the load screw adjustment.

~If neither of those improve, or point to the problem you probably should pull the float bowl & check those main nozzles for plugging & also make sure the float is set correctly [I always just set the float top level [parallel with the bowl gasket surface].

~I guess if the carb has a good fuel supply, the float is set correctly, the main nozzles aren't plugged, & the load screw isn't set too lean, you will have to pull the carb apart, or if you don't feel comfortable doing that send it to a professional carb shop.