I have a 2003 yamaha 4 stroke w/carbs on my 2004 c-22 and had no problems....great engine/gas milage.....very quit also!! So far Iam very stoked w/powerplant and boat!! Sure beats my father in-laws 24 ft skipjack with a volvo penta v8 ..it cost him over 250 bucks to goto catlina for a fricken...