mine would not come back off the floor (return spring). if that's the case you may have a situation where the warm up hose coming off the k-fish (or some such hose, i really can't remember which one it is) is touching the return spring up on top of the motor (it keeps tension on and/or against the linkage and of course attaches to it). couldn't deal with calling the factory so i went to h-ware store and bought two springs. can't remember the da*n sizes, though -- and slid one inside the other and remounted. there should be a fair amount of tenstion there, if you think about it.