Thanks Tom. I scanned thru the Rotax maintenance manual and did not find any mention of torque for this nut. Looks to be an M8 which Rotax would default to 24 Nm (17.7 ft-lb) torque per page 35 of their maintenance manual, but that seems a bit high for that nut. Do you (or anyone else) know where Rotax addresses the installation of this nut (i.e. the carburetor linkages)?