8B. Float Type Carburetor (Eh12-2D); 8B-1 Operation And Construction - Robin EH09D Service Manual

8b. FLOAT TYPE CARBURETOR (EH12-2D)

8b-1 OPERATION AND CONSTRUCTION

8b-1-1 FLOAT SYSTEM
The float chamber is located below the carbure-
tor body and, with a float and a needle valve,
maintains a constant fuel level during engine op-
eration.
The fuel flows from the fuel tank into the float
chamber through the needle valve. When the fuel
rises to a specific level, the float rises, and when
its buoyancy and fuel pressure are balanced, the
needle valve closes to shut off the fuel, thereby
keeping the fuel at the predetermined level.
PILOT OUTLET
BY-PASS
PILOT AIR JET
AIR
INTAKE
CHOKE
MAIN AIR JET
- 53 -
FLOAT
MAIN NOZZLE
Fig. 8-5
FUEL
NEEDLE VALVE
Fig. 8-4
PILOT JET
FLOAT
MAIN JET