O.S. Engines 21XM - Manual (Page 6)

BASIC ENGINE PARTS
Carburettor(OS TYPE 20J)
Needle-Valve
Water-Cooled Cylinder Head
E-2050 Silencer
Water Inlet Tube
Exhaust Outlets
Cooling Water Pickup
Carbon-Reinforced Propeller
Skeg
Outboard Unit Lower Housing
Cavitation Plate
Oil Transfer Tube
Transom Mounting Plate
Steering Arm
Throttle Linkage Bracket
Crankcase
Throttle Lever
Mixture Control Screw
Flywheel(OS No.2J)
5