O.S. Engines 12TG-PX - Manual (Page 12)

22
Turn the needle-valve clockwise until it stops. This
is the fully closed position. Do not force it to turn
further. Metering needle is set at basic position.
(Refer to P30.)
Needle Valve
Open Close (clockwise)
approx 0.5mm
The carburetor is set as shown below at the
factory. Start the engine as it is.
The needle-valve is set approx. 2.5 turns opened
from the fully closed position.
Approx. 0.5mm open
factory setting
In case of the 12D carburetor
Mixture control screw is set at basic
position. (Refer to P30.)
approx 1mm
In case of the 12E carburetor
Approx. 1mm open
factory setting
Common to 12D/12E carburetors
23
Fuel
Deliver fuel into the carburetor.
Fuel tank side
Note
Check the throttle opening at idle before installing
an air cleaner. After the engine is started, be sure
to install an air cleaner.
If the fuel tank is equipped with a choke button, push
the button to send the fuel to the carburetor. If not,
apply an electric starter to send the fuel to the
carburetor.
Swith on the transmitter and make sure that each
linkage moves correctly.
Fuel tank
choke button Note
If too much fuel is delivered into the engine, the
engine cannot be started due to over-priming. In
this case, refer to page 7 and TROUBLE SHOOTING
about over-priming.