Vanguard BIG BLOCK M540000, Repair Manual, Page: 67 / 168

Carburetor and Spacers
Your engine may be equipped with either a cyclonic air
cleaner assembly or a low-profile air cleaner assembly.
On engines equipped with a low-profile air cleaner, the air
cleaner base makes use of 4 studs that secure the intake
adaptor, carburetor, spacers and gaskets to the intake
manifold. For this style of air cleaner, proceed to Low Profile
Air Cleaner Equipped Engines, see Figure 76.
Engines equipped with a cyclonic air cleaner assembly will
have an intake elbow that makes use of 4 studs to secure the
carburetor, spacers and gaskets to the intake manifold. For
this style of air cleaner, proceed to Cyclonic Air Cleaner
Equipped Engines, see Figure 75.
Cyclonic Air Cleaner Equipped Engines
1. Disconnect the valve cover breather hose from the
carburetor.
2. Disconnect the fuel vent line at the intake elbow.
3. Disconnect the fuel feed line from the carburetor by
squeezing the tangs of the clamp and sliding the clamp
away from the carburetor. Remove the fuel line from the
carburetor port using the Fuel Line Removal Tool. See
SECTION 3 - TROUBLESHOOTING - Special Tools List .
NOTE: Wrap a shop towel around the fuel line during
removal to catch any residual fuel in the line.
4. Disconnect the fuel pump vent line at the intake manifold
port by squeezing the tangs of the clamp and sliding the
clamp away from the intake manifold. Remove the line
from the intake port. Use the fuel line removal tool, if
necessary.
5. Disconnect the carburetor choke rod at the carburetor.
6. Disconnect the anti-afterfire solenoid electrical connector
from the solenoid.
7. Remove the 4 fasteners that secure the carburetor ( A ,
Figure 75) to the intake elbow. Remove the intake elbow
and discard old gasket.
75
8. Lift the carburetor SLIGHTLY to allow for the
disconnection of the throttle rod and spring. Undo the
throttle rod clip and release the spring. Remove the
throttle rod from the throttle lever at the carburetor.
9. Remove the carburetor from the engine.
NOTE: Place the carburetor in a container or on shop
towels to capture any residual fuel.
10. Remove the gaskets and spacers between the carburetor
and intake manifold ( Vertical Shaft engines) or intake
elbow ( Horizontal Shaft engines).
11. On Horizontal Shaft engines, remove the 3 fasteners
that secure the intake elbow to the intake manifold ( B ).
12. Remove the intake elbow from the intake manifold and
discard old gasket.
Low-Profile Air Cleaner Equipped Engines
1. Follow steps 1-6 listed above.
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