Benelli
Depends on which Benelli. Refer to Benelli USA website for an owner's manual.
Benelli Armi
Benelli - motorcycles - was created in 1911.
Benelli - firearms - was created in 1967.
You will have to contact Benelli to see if they will tell you.
Andrea Benelli was born in 1960.
The ratio is about 15:1 fuel to air.
Fuel mixture ratio for Yamaha rt100?
roughly 20-30 miles worth of fuel
Download a manual from the Benelli website. Link: http://www.benelliusa.com/shotguns/benelli_m2.php
35:1 is the fuel mix ratio