Choke System

Ten choke illustrations, including a typical choke system (figure 15, 4M-25) and others numbered 4M-21 and 4M-28. They show the choke rod and valve, fast idle cam and follower, vacuum break assembly and rod, unloader tang, thermostatic coil and rod, air valve lockout lever, split choke spring, and later designs with a delayed vacuum break diaphragm, check bleed valve, filter screen and secondary vacuum break.

What this section covers

• Choke rod, valve and fast idle cam
• Vacuum break assembly and rod
• Thermostatic choke coil and rod
• Unloader tang and fast idle screw
• Air valve lockout lever
• Delayed vacuum break with check bleed valve
• Secondary vacuum break and plunger bucking spring