I use Berryman Chem. Dip. for my Q-jet carbs. This will clean your carbs or what ever you have nice. Use a parts cleaning brush after parts have soaked for a couple of hours. Just follow the instructions. Cost is around $28.00 to $30.00 per gal. (Buy 2gal). You can purchase @ Auto Zone. Note: Take electrical parts off units you are cleaning.