O.S. Engines 108FSR - Manual (Page 15)

NOTE:
Readjustment may be necessary, occasionally to
allow for changes in fuel formulae, gear ratio or
clutch engagement point.
STARTING
Check that the needle-valve is closed. (Do not
overtighten.) Now open the needle-valve 1 -2
turns from the fully closed position and temporarily
set the throttle in the fully open position.
2
1
2.
1.
3.
4.
Turn needle-valve clockwise to close
(for leaner mixture)
Turn needle-valve counter-clockwise to
open (for richer mixture)
Mark
Close
Open
Throttle Stop Screw
Mixture Control Screw
(Mixture Control Valve)
Install an appropriate propeller and tighten
securely.
To facilitate electric starting, fit an spinner for
centring the rubber drive insert of the starter.
Fill the fuel tank. Do not allow fuel to overflow into
the silencer, otherwise the engine may become
flooded and difficult to start. 1.5
~
2mm
5. Open the throttle approx.
(This is to avoid unnecessarily high r.p.m. when the
engine starts.)
14