good tip, I don't think I left anything out. there is vacuum and I used a small syringe to apply gas to the engine. it fired up. so now I know the problem lyse in the carb. like I said the carb it getting gas. but it is not evacuating to the engine. so I'm wondering are carburetors interchangeable similar to older model vehicles? I would like to get a new carb but the exact replacement would ruin me $180.00. I seen some 50cc carbs go for as little as $50.00