Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

Has anyone found an additive that effectively cleans the carburetor on a small 2 cycle engine. As usual, the 340 is running rough at the beginning of the season despite having been stored without fuel in the tank over the winter. Thanks in advance for your help.

You can try SeaFoam to see if that helps.  If it doesn't, check your air filter, fuel lines and fuel tank for water debris.  If all is well there, you might have to pull the carb and get a rebuild kit for it. 

A bit of water in the fuel can play havoc on engine performance.

I use Seafoam in all my OPE. Makes a big difference in terms of running smoothly and keeping carbon build up and gum deposits to a minimum. I use it as a fuel stabilizer and conditioner.