Evinrude 4906B 4HP 1969, Руководство пользователя

Страница: 107 / 422

4-16 FUEL
GOOD WORN
WORN
GOOI!)
Cross-section
of
the needle and seat arrangement on
Johnsori/Evinrude carburetors, showing a worn and new
needle for comparison.
Move the throttle shaft back-and-forth
to check for wear. If the shaft appears to
be too loose, replace the complete throttle
body because individual replacement parts
are NOT available.
Inspect the main body, airborn, and ven-
turi duster gasket surfaces for cracks and
burrs which might cause a leak. Check the
float for deterioration. Check to be sure
the float spring has not been stretched. If
any part of the float is damaged, the unit
must be replaced. Check the float arm
needle contacting surface and replace the
float if this surface has a groove worn in it.
Inspect the tapered section of the idle
adjusting needles and replace any that have
developed a groove.
If a high-speed or
if
ice is installed on the
carburetor being serviced, check the orifice
for cleanliness. The orifice has a stamped
number. This number represents a drill size.
Check the orifice with the shank of the
proper size drill to verify the proper orifice
is used.
The correct size orifice for the
engine and carburetor being serviced may be
obtained from the local OMC dealer.
Most of the parts that should be replaced
during a carburetor overhaul are included in
overhaul kits available from your local ma-
rine dealer. One of these kits will contain a
matched fuel inlet needle and seat. This
combination should be replaced each time
the carburetor is disassembled as a precau-
tion against leakage.
INLET
NEEDLE
FLOAT
Parts necessary
to
properly rebuild
a
carburetor are
included in a JohnsonjEvinrude repair kit.
ASSEMBLING TYPE I CARBURETOR
13- Install a NEW inlet nozzle seat with
a
NEW
gasket into the carburetor. Slide a
NEW
gasket down over the inlet nozzle onto
the surface of the carburetor.
14- Attach a NEW inlet needle onto the
spring included in the carburetor repair kit,