MD21B; AQD21B Miscellaneous Equipment Water-cooled Exhaust Riser Parts on group Water-cooled Exhaust Riser: Pos. Part No Qty Parts name Comments 1. 840390 [1] Exhaust riser 2. 3. 952359 [1] Plug 4. 819727 [1] Gasket 5. 955317 [4] Hexagon screw 6. 941908 [5] Spring washer 7. 924089 [1] Stud 8. 963107 [1] Lock nut 9. 180293 [1] Elbow nipple See group 2B 10. See group 2B Parts catalog : Separate Exhaust Outlet and Water Intake: MD21 Separate Exhaust Outlet and Water Intake: A Cooling Water Intake: 841723 Cooling Water Intake: 828244 Electrical Oil Bilge Pump Water Cooled Exhaustline Water Cooled Exhaust Silencer with Installation Components Water Cooled Exhaust Silencer with Installation Components Connecting Components Fuel Filter - Fuel Tank Tank Meter Kit for Fuel and Drinking Water: 834399 Tank Meter Kit for Fuel and Drinking Water: 834400