20
Close
Open
Needle-valve
Open the needle-valve 4 turns (for 10LA),
3 turns (for 15LA),
1 turns (for 25LA) in the direction of arrow
from the closed position.
2
1
Fully closed
position
Fully opened
position
Throttle
Close
Open
4
Opening and closing of the needle-valve
5
Setting the needle-valve
Turn needle-valve clockwise to close (for
leaner mixture).
Turn needle-valve counter-clockwise to open
(for richer mixture).
The position where the needle-valve stops is
the fully closed position. It may be convenient
to remember the position of the mark or set-
screw at this time.
6
Open the throttle fully
21
Fuel inlet
Fuel Tube
Fuel will flow
from tank to
carburettor as
propeller is
turned.
Place your finger
over the carburettor
to choke intake.
Turn the propeller
two revolutions
while watching
fuel line.
7
Priming
When the engine is being started for the first time, turn the
propeller two revolutions after fuel reaches the fuel inlet, as
described above. However, when re-starting the engine
immediately after a run, one revolution, or even no priming
at all may be required. The engine's requirements will be
quickly learned with experience.
Priming quantity
8
Turn the propeller 3 to 4 turns counter-clockwise
smartly by finger in the direction of arrow. Turn
approx. 10 turns instead when the engine is cold.
Do not energize the
glowplug at this stage.
After fuel has been drawn to the carburettor, flip the
propeller two more revolutions, with intake choked, to draw
fuel into engine. Above procedure is called priming.
NOTE (IMPORTANT)
The quantity of fuel drawn into the engine by
priming is an important factor in starting the
engine successfully.
