You can send an e-mail to [email protected] if you like. They will probably ask that you send them the engine. I have sold many of the 35cc engines and have had nothing but rave reviews from thier owners, not sure why you are having such a hard time with it! Did you get the correct carb from Morros Hobbies or is it something different? You could ask that the factory send you a new carb to try on your own, if you do make sure you ask for all the appropriate gaskets to go with it.

Good Luck!