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Connect the carburettor's fuel inlet pipe (highlighted in the figure) to a pressure tester [ACC130]
via a tube.
The carburettor pressure test must be carried out with air.
Check that there is no gasoline in the carburettor before carrying out the test.
Gradually increase the pressure and check that the that the needle of the metering lever releases
air at the pressure values indicated in the table.
Vittorazi factory
settings (bar)
0,6-0,8
In the event of a fault, measure the height of the metering lever again and replace the spring if
necessary.
Replace the gasket (5) and the 2 self-locking nuts M8 (3) each time they are disassembled.
Cosmos 300 – Maintenance manual – V2
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