Hello, this topic has probably been discussed many times on this forum; however, I missed them or haven't paid attention. I have a problem with an engine that when powered up, and it moves forward, it moves in jerks. As more power is applied it runs further between jerks. I did charge the battery before start-up. Could the old rechargeable battery be bad or do I have other problems? Any help or suggestions would be appreciated.
Thank you
Gene M.
