Choke Synchronization - Tecumseh V-twin Technician's Handbook

6. Connect both carburetors by attaching the link and
link connector bushing clip to the # 1 carburetor.
7. Hold the throttle plate on the #2 carburetor in the
true idle position. (Screw against the tang). NOTE:
Do not set the gap using the idle R.P.M. adjustment
screw.Use a .010" (.254 mm) feeler gauge to set
the air gap between the idle R.P.M. adjustment screw
and the throttle plate tang on the #1 carburetor. (Illust.
4-13) The throttle cross link will need to be bent
inward (toward the engine) to increase the air gap or
pulled outward to decrease. (Illust. 4-14)
4-13
CROSS LINK
4-14

CHOKE SYNCHRONIZATION

1. Engage the choke control cable of the equipment to
the full choke position.
2. Remove the control assembly cover, air cleaner
cover, air cleaner and air cleaner baffle. (Illust. 4-15)
#2 CYLINDER
#1 CYLINDER
3. Visually inspect that the choke shutter plate on the #
2 carburetor is completely closed. If the plate is not
completely closing, choke cable adjustment is
necessary.
4. Apply and hold light pressure closing the choke lever
on the #2 carburetor. Attempt to rotate or move the
choke plate on the #1 carburetor. (Illust. 4-16) If
movement can be found or the choke shutter is not
completely closing, the choke cross-link will need to
be adjusted. To adjust, bend the cross-link inward
towards the cylinder block until both choke shutters
completely close at the same time.
Re-assemble the components, ensure the cable clamps
are tight. Start the engine and allow it to warm up (3-5
minutes). Set the governed idle and top no-load RPM.
The correct RPM settings can be located on microfiche
card #30 or the computer parts look-up systems. The
use of a vibra-tach Tecumseh part #670156 or a digital
engine tachometer part #670341 will aid in this procedure.
4-15
4-16
4-5