FUEL AND LUBRICATION SYSTEM 5-13
AIR
MIXTURE
FUEL
STARTER (ENRICHER) SYSTEM
Pulling the starter (enricher) plunger 1 causes fuel to be drawn into the starter circuit from the float chamber
2.
The starter jet 3 meters this fuel. The fuel then flows into the fuel pipe 4 and mixes with the air coming from
the float chamber 2. The mixture, rich in fuel, reaches starter plunger 1 and mixes again with the air coming
through starter air jet 6 from the diaphragm chamber.
The three successive mixings of the fuel with the air provided the proper fuel/air mixture for starting. This
occurs when the mixture is sprayed through the starter outlet port 5 into the main bore.
NOTE:
A starter (enricher) system is operated almost the same way as a choke.
FLOAT SYSTEM
The float 1 and needle valve 2 work in conjunction with one
another. As the float 1 moves up and down, so does the needle
valve 2.
When there is a high fuel level in float chamber 3, the float 1
rises and the needle valve 2 pushes up against the valve seat.
When this occurs no fuel enters the float chamber 3.
As the fuel leve falls, the float 1 lowers and the needle valve 2
unseats itself; admitting fuel into the float chamber 3.
In this manner, the needle valve 2 admits and shuts off fuel to
maintain the appropriate fuel level inside the float chamber 3.
FUEL
To Next Page
Loading...
