I have a Honda 90 that runs fine until it is put in gear, then sputters and sputs and dies. Carborator has been rebuilt twice. Replaced all the fuel lines. and 3 new fuel filters. Once you can get past it coughing and weezing runs great until you slow down or stop. Can take 30 seconds or 30 minutes to get back up to speed. Have put in fuel additives and only buy the best fuel. Fuel pump is next unless something else to try - been fighting this for 2 years now...