Tecumseh AH520 -, Руководство пользователя

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17
FUEL FITTING
NOTE: MOST service carburetors are marked “SVC
CARB NF” in the Price List. This means that the carburetor
comes with NO FUEL FITTING.
Use the parts manual to obtain the same fuel inlet
fitting that was installed in the original carburetor. Install
the fuel fitting in the new carburetor body in the same
position as on the original carburetor. Support the
carburetor body with a wood block to avoid damage
to other parts. Use a bench vise or press to install
the fitting squarely. Press it in until it bottoms out.
NOTE: PRESS FUEL FITTING IN SQUARELY USING
CAUTION SO THAT THE CARBURETOR BODY IS
NOT DAMAGED.
INLET FUEL FITTING
To remove a leaking or damaged fuel inlet fitting, use
a 1/4"(6 mm) bolt, 1/4" (6 mm) nut and 1/4" (6 mm)
washer, along with a 1/2" (12 mm) nut. Use a pliers or
vise to remove the plastic part of the inlet fitting. Tap
the inside of the remaining metal portion of the fitting
using a 1/4"- 20 (6 mm) tap. Place a 1/2" (12 mm)
nut over the fuel fitting (it may be necessary to guide
one side of the nut to seat it squarely to the carburetor).
Next thread the 1/4" (6 mm) nut on the bolt until it
contacts the shank, add the washer, and thread the
bolt into the fitting until snug. Tighten the 1/4"-20 (6
mm) nut until the fitting is removed.
STANDARD SERVICE CARBURETORS
CHOKE SHAFT
NOTE:
Never reuse choke or throttle shutter screws,
always replace with new Tecumseh service screws
part number 650506.
Remove the choke shutter screw from the original
carburetor and remove the choke shaft. Observe the
position of the ends of the choke return spring if one
is present. Also observe the position of the cut-out
and/or holes in choke shutter. Some chokes turn clockwise
and some turn counterclockwise, note the position of
the choke shaft prior to removal from the old carburetor.
If a choke stop spring is present on the new carburetor
and is not used on the old carburetor, cut it off with a
side cutter or pull it out using a pliers.
Test the action of choke shaft to make sure it moves
freely and easily and does not bind in either open or
closed position. If binding occurs, loosen the shutter
screw; reposition the shutter and tighten the screw.
THROTTLE LEVER
Remove the throttle lever and spring and file off the
peened end of the throttle shaft until the lever can
be removed. Install the throttle spring and lever on
the new carburetor with the self-tapping screw furnished.
If dust seals are furnished, install them under the return
spring.
IDLE SPEED ADJUSTMENT SCREW
Remove the screw assembly from the original carburetor
and install it in the new carburetor. Turn it in until it
contacts the throttle lever. Then an additional 1 turn
for a static setting.
FLOAT TYPE CARBURETOR
CHOKE SHAFT SELF TAPPING SCREW
LEVER
SPRING
WASHER
FELT SEAL
THROTTLE SHAFT
IDLE CRACK
SCREW AND
SPRING
SPRING
WASHER
FELT SEAL
CHOKE STOP
SPRING
SCREW
SHUTTER
SHANK
"O" RING
FLOAT
DIAPHRAGM TYPE CARBURETOR
FUEL FITTING
LOW SPEED
ADJUSTMENT
SCREW
HIGH SPEED
ADJUSTMENT
SCREW
THROTTLE LEVER
AND SHAFT
SPRING
WASHER
SEAL
WASHER
SPRING
PRIMER FITTING
DIAPHRAGM
COVER
DIAPHRAGM
GASKET
SHUTTER
SCREW
FUEL INLET
CHOKE LEVER
AND SHAFT
FELT SEAL
THROTTLE SHUTTER
DIAPHRAGM
IDLE ADJUSTMENT
SCREW
SHUTTER SCREW
DIAPHRAGM
COVER SCREW
CHOKE
SHUTTER
SEAT AND CLIP
INLET NEEDLE
SPRING CLIP
FLOAT SHAFT
FLOAT BOWL
BOWL NUT WASHER
HIGH SPEED BOWL NUT