Mercury 2.5 FourStroke Operation, Maintenance & Installation Manual page 38

OPERATION
2. Shift the outboard to the neutral (N) position.
N
19170
3. Make sure the cooling water intake is submerged.
19056
4. Open the manual vent screw on the fuel tank.
47370
5. Move the fuel shut off valve to the open (ON) position.
52331
28
eng