OEM MerCruiser Prop Washer/Nut Kit 12-840383A 2
Propeller nut kit 840383A2 is use on HD (Heavy Duty) 1.25" prop shaft when installed on Mercury Sport Master, Torque Master I and II, Fleet Master and Verado 5.25" diameter gearcase. Also for use on MerCruiser Bravo I XR and XZ stern drives, Sport Master and shorty Sport Master Bravo I XR Sport stern drives. Torque the prop nut to 55 foot pounds (75 Nm). See your owner's manual for installation instructions, the Flo-Torq hub, thrust washers and prop nut part numbers to best fit your engine or drive.