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21 horse Briggs Inteck V-twin. 407777 0121e4 030325. Starts up and idles fine. Goes up to full throttle with out any problems. Problem is as I take my foot off the break/clutch the motor dies. It will restart no problem. Any suggestions appreciated. jhn9840 John

Hello all, Have a 407777 0121-e4 030325 that is over revving upon start up. Put choke all the way on and it slows down to normal. Start to release the choke any at all the rpm’s shoot way up with a lot of black smoke coming from the exhaust. I’ve checked the governor linkages and the adjustment...