O.S. engine MAX-28XZ Instruction Manual page 11

The following procedure is suitable for this
engine when the O.S. T-2060WN tuned si-
lencer and a fuel containing up to 30% ni-
tromethane are used.
Fill the tank completely with fuel.
Temporarily remove the glowplug to check
that it glows bright red when energized.
Element glows when energized.
Replace the plug when the
element does not glow or is
burnt out.
Glow Plug Igniter
Metering needle and mixture control valve
are set at basic position. (Refer to P26.)
Switch on the transmitter and make sure
that each linkage moves correctly.
Turn the engine with starter box to draw fuel
into the engine.
Deliver fuel into the carburetor.
Fuel
Fuel tank side
Now connect glowplug battery lead to heat
the plug filament and start the engine.
The carburetor is set as shown below at the
factory. Start the engine as it is.
The needle-valve is set approx. 3 turns
opened from the fully closed position.
Turn the needle-valve clockwise until it stops. This
is the fully closed position. Do not force it to turn
further.
Pliers
Throttle is set approx. 0.5mm open.
Approx. 0.5mm open factory setting with the
reducer removed
20
When the engines does not start or stops
right after being started, try the followings.
Set the needle-valve approx. 2.5 turns open
from the fully closed position. Do not force
the needlevalve to turn beyond a lightly
closed position.
Set the throttle opening a little wider that the
factory setting by adjusting the Throttle Stop
Screw.
21
Close
Needle Valve
Open
approx 0.5mm
approx 1mm