I have a Briggs model 407577 Type 0292 E1 21HP Intek V Twin engine that is blowing gas out of the carb and flooding the engine. The few times it has actually cranked gas flows out of the muffler and drowns the spark plugs. I took the breather off and tried to crank it and gas is blowing out the back of the carb through the choke assembly. At first I thought it was a float/needle issue so I've put in a new carb kit. No luck. A friend of mine thinks that the engine is building too much pressure and said he had heard that replacing engine gaskets would fix this. I'm no mechanic but pretty good with my hands so I'm trying to fix the mower without paying $55 an hour. Most everything I've read pointed to a bad carb float/needle other than a few strings on a possible crankcase gasket being bad. Any info would be appreciated. Thanks
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