With new plugs in and four tanks of new gas run through, it will still die out at low speed. Also does not have a lot of power when it takes off. I have the idle speed set up so that it will not die when you put it into gear. Will not run in reverse, will die. Once it goes it runs great. A friend checked the plugs and found some water. He suggested a head gasket. Any other ideas??? Thanks for your help.