O.S. Engines 21XZ-M - Manual (Page 9)

16
INSTALLATION OF THE STANDARD ACCESSORIES
Install the exhaust seal ring supplied.
Exhaust
Seal Ring
Glowplug
INSTALLATION OF THE DUST CAP SET
If the engine is to be stored or out of use for a while,
install the included exhaust and carburetor dust caps
to prevent foreign matter from entering the engine.
Installing the glow plug. Insert RP7 plug
supplied into marine head carefully, making
sure that it is not cross-threaded before
tightening firmly.
(All the O.S. T-Type plugs including the RP7
are not supplied with a washer.)
17
INSTALLATION OF THE CARBURETOR
As delivered, the engine has its carburetor lightly
installed in the 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. 1.
2.
Rotate the retainer nut
gently until it stops.
Tighten a further
120-180
Rotate the retainer screw gently until it
stops, then tighten a further 120-180 .
Do not overtighten the screw as this will
damage the carburetor spacer.
Note
Be careful not to damage the O rings when
removing the carburetor retainer from the
engine.
First, remove the retainer Retaining screw,
then pull out each part. Do not push the
part in or damage the O rings.
Retaining Screw
"O" Ring
"O" Ring