Never rebuilt a carb!!! But here goes...has anyone setup a new 4160-390 on a 250 ? It's a list 0-8007 with a -65 power valve, .025 nozzle and a "plain" vac. sec. spring and a -51 main jet size... I have 19.5 to 20 vac. at idle.. I have a stumble at med. thrtl. off idle ...Should I get a 9.5 or 10.5 power valve to help (half the vac. reading) ? Maybe the nozzle s/b bigger? I'm hoping to not buy a pile of parts and do it many times... any help for this newbee would be cool !!!
Bear
