FUEL SYSTEM / CARBURETION
4.11
pressure tested after assembly.
Good Condition
Worn, Deposits
Wear areas
Seat
Needle
CARBURETOR ASSEMBLY
NOTE: Refer to the exploded view of the BST 34
Carburetor at the beginning of this chapter for torque
specifications.
Inspect the diaphragm (A) for holes, deterioration, or
damage. Make sure the diaphragm is pliable but not
swollen. The diaphragm should fit properly in the
carburetor body. Replace diaphragm assembly if
diaphragm is damaged.
E
D
C
A
B
3. Replace parts in proper order. The spring seat
washer (B) is stepped and must be placed on
TOP of “E” Clip (C). Spacer washer (D) must be
installed below the E-Clip. Refer to parts manual
for more information.
4. Be sure the tab (E) on outer edge of diaphragm is
positioned properly in the carburetor body.
Pilot Screw
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