Outboard Installation; Important Information; Avoiding Fuel Flow Restriction; Electric Fuel Pump - Mercury 135 OptiMax Manual

OUTBOARD INSTALLATION

Important Information

BEFORE STARTING THE ENGINE
Lack of oil pressure in the system can cause severe internal engine damage during start-up. Prime
the oil injection pump on new or rebuilt engines or after performing maintenance on the oiling system.
Refer to Priming the Oil Injection Pump for instructions.
FUEL REQUIREMENTS
Do not use pre-mixed gas and oil in this engine. The engine automatically receives extra oil during engine
break-in. Use a fresh supply of the recommended gasoline during engine break-in and after engine break-
in.
OIL RECOMMENDATION
Recommended Oil
OptiMax Oil or Premium Plus TC-W3 is a higher grade oil that provides increased lubrication and extra
resistance to carbon buildup when used with good or varying grades of gasoline.
IMPORTANT: Oil must be NMMA certified TC-W3 2-Cycle oil.
Periodically consult with your dealer to get the latest gasoline and oil recommendations. If Mercury
Precision or Quicksilver 2-Cycle Outboard Oil is not available, substitute another brand of 2-Cycle
outboard oil that is NMMA Certified TC-W3. The use of an inferior 2-Cycle outboard oil can reduce engine
durability. Damage from use of inferior oil may not be covered under the limited warranty.

Avoiding Fuel Flow Restriction

IMPORTANT: Adding components to the fuel supply system (filters, valves, fittings, etc.) may restrict the
fuel flow. This may cause engine stalling at low speed, and/or a lean fuel condition at high RPM that
could cause engine damage.

Electric Fuel Pump

The fuel pressure must not exceed 28 kPa (4 psi). If necessary, install a pressure regulator.

Boat Horsepower Capacity

Exceeding the boat's maximum horsepower rating can cause serious injury or death. Overpowering
the boat can affect boat control and flotation characteristics or break the transom. Do not install an
engine that exceeds the boat's maximum power rating.
NOTICE
OptiMax Oil or Premium Plus 2-Cycle TC-W3 Outboard Oil
WARNING
!
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