One of our Ridgid washers with a Subaru engine has been sitting in warehouse for a few months and even after emptying carb bowl and old fuel, simply refused to start. Put one half table spoon of Mechanic in a bottle into the empty fuel tank, filled with fresh fuel and tried starting with choke on. After sitting a few minutes, started, ran for 10 seconds and quit. Tried again in a few minutes and this time it ran for 2 minutes and died. The moment I would turn off choke it died. Let it sit for 30 minutes and tried again. Now it started running normal. Lesson learned. Engines like to run. Not sit idle in warehouse.