Wacker Neuson WM 80 User Manual

WM 80 Repair Carburetor Basics
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Air Purge System
The Walbro carburetor has an air purge system. The air purge system
removes air from the fuel passages so that only fuel fills the carburetor
and the fuel lines.
The heart of the air purge system is the bulb. The bulb works in
conjunction with a number of check valves. Pressing the bulb forces air
(and fuel) through the discharge port back to the tank. Releasing the
bulb creates a vacuum within the fuel passages and sucks air (and
fuel) into the bulb. The metering diaphragm is also pulled by the
suction. This pulls the inlet needle from its seat and allows air (and fuel)
to move from the pumping chamber into the metering chamber. This
air (and fuel) is then expelled by pressing the bulb. Pressing the bulb
until it is filled with only fuel, the purging process is complete.

Wacker Neuson WM 80 Specifications

General

Brand	Wacker Neuson
Model	WM 80
Category	Engine
Language	English