Toying with a 31 briggs yesterday and kinda stumped. This was a engine I recieved on trade that the guy said never ran quite right. cleaned carb and fired right up but will idle at around 2grand only, and if you throttle up the govenor shoots it up to about 35 for a split second then buttterfly closes back to the 2grand mark, kind of coughs threw card ocasionally, if you manualy work throttle at carb it will rev up and runs just fine. So what I've done was put a known good carb on and basically have the same results, I never hooked up gov. but it won't idle unless I keep it at aroung 2grand, and it will rev up but ocasionall will spit back through carb. Any ideas? Thanks for any help!!!
