My neighbour asked me for some help with his mower. It was smoking real bad would barely run. Then It started spitting oil out. Turns out gas flowed into the crankcase Through the breather tube And overfilled it. I am looking for a new carb for it, dealer says they are discontinued. It is an older model with a briggs engine. It is a 17 horse Crown series motor. Where would I look for a carb? Amazon or is a rebuild kit available too? I changed the oil and spark plug on it and it was running great, I am going to put a fuel shutoff on it so he can keep using it. put some sea foam in the tank to see it. That helps. I suspect the rubber on the needle is shot. Any help or ideas.