Evinrude 4906B 4HP 1969 Owner's Manual page 134

justrnent, Return the engine to idle speed.
If the engine coughs and operates as if the
fuel is too lean, but the idle and high-speed
adjustments have been correctly made, then
recheck the synchronization
fuel and ignition systems.
the fuel supply and allow the engine to run
until it first begins to misfire from lack of
fuel. Retard the spark and shut the engine
down. Tighten the sleeve nut securely
prevent the needle
position through engine vibration while it is
operating, but still allow the needle valves
to be adjusted by hand using the knob on the
end of the valve.
The idle stop is located on the port side
of the engine, on the outside of the cowling.
Adjust the nylon screw inward or outward to
obtain the desired idle speed.
4-10 TYPE III CARBURETOR
This carburetor
hp engine. The unit has an adjustable
speed needle valve and fixed high-speed
needle valve. The only changes that have
been made to this particular
tor over the years was a redesign of the idle
needle valves. On early model 9.5 hp en-
gines, the reeds set directly below the car-
buretor. On later models, the reeds were
removed from this location
between the engine block and the intake
manifold.
between
Now, shut off
valves from changing
is installed on the 9-1/2
low-
model carbure-
and installed
The early model idle needle valves ex-
tended out of the carburetor
spring, and E-clip.
controlled from the front of the engine by
the
means of a flexible cable.
carburetor,
be removed
moved f rom the engine.
Later
to
with a long packing nut and linkage.
adjustable
engine controls
When servicing the late model carburetors,
the low-speed needle valve adjustment
and linkage
carburetor
REMOVAL
1- Remove the choke rod that extends
over the top of the carburetor
the choke rod out of the nylon snap.
connect the fuel line from the carburetor.
2- If the carburetor
with the needle through the nut and a nylon
adjustment
move the linkage from the knob.
3- If the carburetor
the front of the engine, remove the knob on
the front of the engine and then turn the
flexible cable COUNTERCLOCKWISE until
the needle valve is removed from the carbu-
retor.
TYPE III CARBURETOR
with an O-ring,
The needle valve was
On this model
the cable and control knob must
before the carburetor
model carburetors
knob located on the front of the
movement of the
must be removed
is removed from the engine.
has a packing nut
knob, remove the knob or re-
has a flexible line to
4-43
is re-
are equipped
An
valve.
knob
before the
by snapping
Dis-