O.S. Engines 25XZ - Manual (Page 9)

16
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 P3 plug supplied
into heatsink-head carefully, making sure that
it is not cross-threaded before tightening firmly.
(All the O.S. T-Type plugs including the P3 are
not supplied with a washer.)
INSTALLATION OF THE STANDARD ACCESSORIES
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 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 body.
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
Pull out.
Pull out.