Normal
I own one of those 4 stroke single cylinder 6hp Tohatsu's and it shakes, rattles and roles due to the one cylinder. I hate it actually and am selling it this summer because of the vibration it makes. The 2 cylinder should not behave that way though, the other cylinder should counteract the other and be smooth. I would take it to a dealer immediately as this does not sound right for a brand new 2 cylinder motor.
