Sea Foam also has a pressured spray cannister that comes with a small diameter, longish, red extension that you can mount to the can and slip the straight end of the extension under the carb/injector intake hose (at a hose clamp joint) and spray the whole can while at a fast idle. The stuff works and cleans up the whole top end.
Mix a little to your 2 cycle lawn equipment/chainsaws, etc., and you'll have no fuel problems with them.
Marvel Mystery is just as good by my long term reckoning, just wished they made it in a pressurized container like does Sea Foam..
