Yamaha XV1600A1999 Service Manual page 378

CARBURETOR
6. Install:
S fuel cock
7. Connect:
S fuel hose
EAS00506
CHECKING THE FUEL COCK OPERATION
NOTE:
After installing the fuel cock, check its operation.
1. Set the fuel cock to "OFF".
2. Disconnect:
S fuel hose
(from fuel cock)
3. Check:
S fuel cock operation
a. Place a container under the end of the fuel
cock.
b. Check that the fuel cock lever is turned to
"ON" or "RES".
Fuel flows.
Fuel does not flow.
4. Connect:
S fuel hose
6-20
CARB
Fuel cock is OK.
Replace the fuel
cock.
E