Carburetor Inspection and Adjustment WM 80 Repair
100 wc_tx000522gb.fm
See Graphic: wc_gr002905
Tillotson Single Needle:
On single-needle Tillotson carburetors the high-speed fuel jet is fixed;
only the low-speed jet can be adjusted. See section Operating & Idle
Speeds for correct operating and idle speed settings. For initial
carburetor set-up after rebuilding, complete the following procedures:
8.3.13 Turn in (clockwise) the low-speed mixture valve (L) by hand until tight.
NOTICE: Do not overtighten valve. Damage to valve seats may result.
8.3.14 Preset the low-speed mixture valve by opening it 1 revolution (turn)
counterclockwise.
8.3.15 Start the engine and allow it to warm up to operating temperature by
running it at high speed for 3–6 minutes.
8.3.16 Set the engine idle speed with the engine throttle control closed and
the choke fully open. Adjust the low-speed mixture valve until the
correct low speed is set. Turn the valve clockwise to lean,
counterclockwise to enrich.
Tillotson Idle By-pass and Bing Carburetors:
These carburetors use fixed jets for high- and low-speed operation,
and no adjustments are required. Correct idle speed is obtained by
adjusting the idle speed screw. Adjust idle speed with the throttle
control closed, the choke open, and the machine warm. See section
Operating & Idle Speeds for correct operating and idle speed settings.
H
L
wc_gr002904
L
wc_gr002905
To Next Page
Loading...
Need help?
General
