Filling The Fuel Tank; Engine Oil Recommendations - Mercury 2.5 FourStroke Operation, Maintenance & Installation Manual

2. Open the manual vent screw on top of the cap for operation and cap
removal. Close the manual vent screw for transportation.
a

Filling the Fuel Tank

Avoid serious injury or death from a gasoline fire or explosion. Use caution
when filling fuel tanks. Always stop the engine and do not smoke or allow
open flames or sparks in the area while filling fuel tanks.
Fill the fuel tank outdoors away from heat, sparks, and open flames.
Remove the portable fuel tanks from the boat to refill them.
Always stop the engine before refilling the fuel tank.
Do not completely fill the fuel tank. Leave approximately 10% of the tank
volume unfilled. Fuel will expand in volume as its temperature rises, and can
leak under pressure if the fuel tank is completely filled.

Engine Oil Recommendations

Mercury or Quicksilver NMMA FC‑W certified SAE 10W‑30 4‑Stroke Marine
Engine Oil is recommended for general, all‑temperature use. If NMMA certified
synthetic blend oil is preferred, use Mercury or Quicksilver SAE 25W‑40
Synthetic Blend Marine 4‑Stroke Engine Oil. If the recommended Mercury or
Quicksilver NMMA FC‑W certified outboard oils are not available, a major
FC‑W certified 4‑stroke outboard oil may be used.
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FUEL AND OIL
b
WARNING
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19
a - Fuel cap
b - Manual vent screw
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