Section 3. Tecumseh Carburetors - Tecumseh HH100 Handbook

SECTION 3. TECUMSEH CARBURETORS

Following are initial carburetor adjustments to be
used to start the engine. After the engine has reached
operating temperature make final adjustments.
Main Adjustment
Screw
Idle Adjustment
Screw
The Master Parts Manual or Microfiche has a direct
engine-to carburetor reference list. Further identification
of the carburetor is stamped on the carburetor body
as shown. Refer to the standard service part number
and the identification number on the carburetor body,
in any correspondence.
THROTTLE
LEVER
WELCH PLUG
CARBURETOR DISASSEMBLY, INSPECTION AND
ASSEMBLY. Carefully disassemble carburetor, removing
all non-metallic parts, i.e., gaskets, viton seats and
needles, "O" rings, fuel pump valve, etc.
THROTTLE. Examine the throttle lever shaft and
shutter prior to disassembly. Replace any worn parts.
1. Remove the screw in the center of the throttle
shutter and pull out the throttle shaft lever assembly.
2. When reassembling, replace the throttle shutter
with identifying marks as positioned prior to
disassembly. The throttle shaft must be held in
tight to the bottom bearing to prevent the throttle
shutter from riding on the throttle bore of the
body, causing excessive throttle shutter wear
and governor hunting.
6
HH80-100-120
VH100, 1-3/4 turns.
HH80-100-120
VH100, 1-1/4 turns
CHOKE LEVER
CARBURETOR
MODEL NUMBER
NOTE: IDENTIFYING MARK WILL BE
FOUND IN THE 3 O'CLOCK POSITION
THROTTLE
SHUTTER
CHOKE. Examine the choke lever, shaft and shutter
prior to disassembly. Replace any worn parts.
1. Remove the screw in the center of the choke
shutter and pull out the choke shaft lever assembly.
2. When reassembling, replace the choke shutter
with identifying marks as positioned prior to
disassembly. Hold the choke shaft securely into
the bearing bore when replacing the choke shutter.
IDLE ADJUSTMENT SCREW. Remove the idle screw
from the carburetor body and examine the point for
damage to the seating surface of the taper. Replace
any damaged parts.
BAD
CHOKE SHUTTER CUT
OUT CLEARANCE FOR
INTERNAL VENT TUBE
GOOD