Today my robin pull start would not engagie. This has never happened before. So I took the cover off and the 4 screws that hold the pull start to the motor. Eveything looked normal no broken or missing parts. So I put it back togather and it worked. Then I went to the store, when I came back out I tried to use the pull start it would not work. You can pull the cord and it will recoil but its not engageing the engine enableing it to start. I pulled on it a few time and then it caught and fired up. However Im not sure whats causing this. Also big suprise when you take the 4 screws out that hold the pull start to the engine the gas tank drops thats all that holds it in place. Other then that the robin is a great engine. Let me know if you have any ideas on whats going on and what I can do to fix it...Thanks