The Conley Mega carb (non-pumped) works very well on this engine. The best of any carb....and I tried quite a few. I sold a Sig Cap with this engine to a youngster at our field at the end of last year. I told him don't touch the needles on the carb, and he's followed my advice. Easy starts, plenty of power, excellent throttle response, and it never goes dead stick until he runs it out of fuel. Equipped with OS-F plug and the Bisson Pitts muffler with one outlet plugged.