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Mercury 90 Operation Maintenance Warranty Installation Manual

Mercury 90
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Since sealed fuel tanks are not vented, they will expand and contract as the
fuel expands and contracts during heating and cooling cycles of the outside air.
This is normal.
REMOVING THE FUEL CAP
a - Fuel cap
b - Manual vent screw
c - Tab lock
IMPORTANT: Contents may be under pressure. Rotate the fuel cap 1/4 turn to
relieve pressure before opening.
1. Open the manual vent screw on top of the fuel cap.
2. Turn the fuel cap until it contacts the tab lock.
3. Press down on the tab lock. Rotate the fuel cap 1/4 turn to relieve the
pressure.
4. Press down on the tab lock again and remove the cap.
DIRECTIONS FOR USING THE PRESSURIZED PORTABLE FUEL TANK
1. When installing the fuel tank cap, turn the cap to the right until you hear a
click. This signals that the fuel cap is fully seated. A built‑in device
prevents overtightening.
2. Open the manual vent screw on top of the cap for operation and cap
removal. Close the manual vent screw for transportation.
3. For fuel hoses that have quick disconnects, disconnect the fuel line from
the engine or fuel tank when not in use.
4.
Follow Filling Fuel Tank instructions for fueling.
Oil Recommendation
Recommended Oil
OptiMax Oil or Premium Plus 2Cycle TCW 3
Outboard Oil
Mercury OptiMax/DFI or Quicksilver DFI 2‑Cycle Engine Oil is recommended
for your engine. If Mercury OptiMax/DFI or Quicksilver DFI 2‑Cycle Engine Oil
is not available, we recommend using Mercury or Quicksilver TC‑W3 Premium
Plus 2‑Cycle Oil. Severe engine damage may result from use of an inferior oil.
a
b
c
46290
FUEL AND OIL
eng 47

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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