When cold give only 3 to 4 pumps on the primer any more and it will flood. Then pull with your left hand and give throttle with your right. Keep opening and closing the throttle a small amount while pulling until started. Once started it will idle back down quick then give it another quick pump of the primer and it will rev back up again and do this until it idles fine. Also when these sleds are warm you still need to give them gas when you start them.