500; 500A; 501A Miscellaneous Equipment Extension Kit 4'': 872090 Parts on group Extension Kit 4'': 872090: Pos. Part No Qty Parts name Comments 1. 872090 [1] Extension kit 2. 5. 850304 [1] Splined sleeve 7. 941809 [3] Hex. socket screw 8. 941810 [4] Hex. socket screw 9. 925256 [1] O-ring 10. 125017 [1] O-ring 11. 941820 [1] O-ring 12. 897823 [1] Oil pipe Parts catalog : Extension Kit 4'': 841318 Extension Kit 1'': 854686 Extension Kit 1'': 839548 Propeller Cone Kit. tool, Cone Tightening. Duoprop. Propeller, Duoprop 500A, 501A Propeller Drive Unit: B 500A, 501A Power Trim Panel Fly Bridge 500A, 501A Rudder Indicator Kit: 858886 500A, 501A Rudder Indicator Kit: 1140463 500A, 501A Rudder Indicator Kit: 1140465 500A, 501A Fresh-water Cooling Fresh-water Cooling