Evinrude 4906B 4HP 1969 Owner's Manual page 138

SPRING
Low-speed needle valve
of a
9.5
the carburetor horsepower engine.
passages to be sure they are- not dogged or
contain any deposits.
wire or any type of pointed instrument
clean drilled passages or calibrated
a carburetor.
Move the throttle
to check for wear.
be too loose, replace the complete throttle
body because individual replacement
are NOT available.
Inspect the main body, airhorn, and ven-
turi cluster gasket surfaces
burrs which might cause a leak.
float for deterioration.
the float spring has not been stretched.
any part of the float is damaged, the unit
must be replaced.
needle contacting surface
float if this surface has a groove worn in it.
Inspect the tapered
adjusting needles and replace any that have
developed a groove.
GOOD
WORN
GOOD
and
Needle seat arrangement,
new
needle for comparison.
O-RING
and
associated parts used
NEVER use a piece of
holes in
shaft back-ana-forth
If the shaft appears to
parts
for cracks and
Check the
Check to be sure
Check the float arm
and replace the
section of the idle
WORN
a
showing worn
in
to
Parts included
Johnson/Evinrude
If a high-speed or ifice is installed on the
carburetor being serviced, check the orifice
for cleanliness.
number. This number represents a drill size.
If
Check the orifice
proper size drill to verify the proper orifice
is used. The local OMC dealer will be able
to provide the correct
engine and carburetor
Most of the parts that should be replaced
during a carburetor
overhaul kits available from your local ma-
rine dealer.
matched fuel inlet needle and seat.
combination
the carburetor
tion against leakage.
ASSEMBLING
1- Install the high-speed orifice into the
float body using the proper size screwdriver
to prevent burring the edges of the orifice.
and
TYPE III CARBURETOR
in a carburetor repair
9.5
horsepower engine.
The orifice has a stamped
with the shank of the
size orifice for the
being serviced.
overhaul are included in
One of these kits will contain a
should be replaced
is disassembled as a precau-
TYPE III CARBURETOR
4-47
kit for the
This
each time