MTD AC3 User Manual
Page 38
Advertising
AC3 Series of Engines
34
6.
In idle position, the throttle is closed, the hole
through the drum is cross-wise to the throat of car-
buretor and the drum is seated at the bottom of its
travel. See Figure 5.13.
•
Throttle closed.
•
The top of the throttle arm is 5/16” (7.9mm)
above the top of the carburetor housing.
7.
As the throttle drum rotates, it also climbs-up a
ramp. The rising throttle draws the fuel metering
needle out of the orifice in the venturi of the carbure-
tor. See Figure 5.14.
•
Throttle at WOT.
•
The top of the throttle arm is 3/8” (9.5mm)
above the top of the carburetor housing.
Figure 5.13
Throttle closed
5/16”
Figure 5.14
3/8”
Throttle open
Advertising