SCHEMATIC DIAGRAM OF MAINTENANCE SIGNIFICANT FUNCTIONAL COMPONENTS OF M3A4 SMOKE GENERATOR (Continued)

TM 3-1040-276-23

a. Fuel Tank Assembly. Supplies fuel (by gravity

flow) to carburetor reservoir of adjustable float assem-

bly on engine assembly. Fuel gage indicates fuel level.

izing line to drive M4 fog oil pump. The remaining gas

b. Engine Assembly. Gasoline-operated, pulse jet,

vaporizes fog oil injected in engine tube and forces fog

single-cycle engine that heats fog oil to generate

oil vapors into inner shell, through mufflers, and out

smoke. Adjustable float assembly meters fuel to engine

smoke discharge nozzles. Once discharged, cooler air

head assembly. Engine head assembly injects fuel-air

condenses fog oil vapors into small droplets to form

mixture into combustion chamber of engine tube

dense white smoke.

assembly. Spark igniter initially ignites fuel-air mixture.

Some hot exhaust gases are routed through a pressur-

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