Type 60W Carburetor, Starting - O.S. engine FL-70 Owner's Instruction Manual

TYPE 60W CARBURETTOR
Two adjustable controls are provided on this
carburettor.
They are as follows:
The Needle Valve
This is used to establish the
fuel/air mixture
required for full power when
the throttle is fully open.
The Airbleed Screw
This is used to establish the mixture strength
required tor steady idling and a smooth
transition to medium speeds. (The varying
mixture strength required between part-
throttle and full-throttle
automatically adjusted by coupled movement
of the throttle.)
The sequence in which these controls are
adjusted is explained in the succeeding
sections, under Starting, Running-in and Idling
Adjustment.
Needle Valve
strength
Airbleed Screw
running
STARTING
The FL-70 is not equipped with manual
choke controls, as it is intended for use
with an electric starter only.
A high-torque electric starter not only
makes starting
dispenses with the need for a choke valve
by turning the engine over fast enough to
cause the fuel pump to prime the cylinder
automatically.
Starting procedure is as follows:
1.Fill the fuel tank with fuel. When filled,
prevent fuel flowing into the carburetor with
a commercially available fuel stopper, etc.
is
Release the stopper before starting the
engine.
2. Make sure that plug element glows red, and
fit the plug to the cylinder head.
25
the engine easier, it