O.S. Engines 21RG-MX - Manual (Page 8)

Insert the taper collet on the crankshaft, taking care
not to push the crankshaft to the cover plate end.
Select the screw
holes according to
the model.
INSTALLATION OF THE CARBURETOR
As delivered, the engine has its carburetor lightly
fitted into its intake boss. Secure it as follows.
Loosen the retainer screw, rotate the carburetor to
its correct position and make sure that it is pressed
well down into the intake boss, compressing the
rubber gasket, before retightening screw.
Rotate the retainer screw gently until it stops, then
tighten a further 90-120˚.
Do not overtighten the screw as this will damage
the carburetor body.
1.
2.
Rotate the retainer nut
gently until it stops.
Tighten a further 90-120˚
Crankshaft
Flywheel
Taper Collet
INSTALLATION OF THE FLYWEEL
INSTALLATION OF THE
EXHAUST HEADER PIPE
7