O.S. Engines 21RZ-R (P) - Manual (Page 12)

LONG SOCKET WRENCH
Recommended for easy removal
and replacement of the angled
and recessed glowplug, the
O.S.Long Socket Wrench
incorporates a special grip.
SILICONE FUEL LINE
Heatproof silicone tubing of
approx. 5mm o.d. and 2mm i.d.
is required for the connection
between the fuel tank and
engine.
CARBURETOR CONTROLS
The Needle-Valve: ¡
The Mixture Control Screw: ¡
The Throttle Stop Screw:
For setting the minimum idling speed:
¡
Three adjustable controls are provided on this
carburettor.
For adjusting the mixture strength when the throttle
is fully open.
For adjusting the mixture strength at part-throttle
and idling speeds, to obtain steady idling and
smooth acceleration to mid speeds.
Needle Valve
Mixture Control Valve
Assembly Screw
Throttle Stop Screw
Ball Link
Slide Valve
Guide Screw
NOTE: Readjustment may be necessary,
occasionally to allow for changes in fuel formula
gear ratio or clutch engagement point.
11