Fuel Requirements For Engine Break-In; Avoiding Fuel Flow Restriction; Filling Remote Oil Tank; Filling Engine Mounted Oil Reservoir Tank - Mercury 150 Manual

IMPORTANT: Oil must be NMMA certified TC-W3 2-Cycle oil.
Mercury or Quicksilver Premium TC-W3 2-Cycle oil is recommended for this engine. For added protection
and lubrication, Mercury or Quicksilver Premium Plus TC-W3 2-Cycle oil is recommended. If Mercury or
Quicksilver outboard oil is not available, substitute another brand of 2-cycle outboard oil that is NMMA
Certified TC-W3. Severe engine damage may result from use of an inferior oil.

Fuel Requirements for Engine Break-in

Do not use pre-mixed gas and oil during break-in. 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.

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.

Filling Remote Oil Tank

Remove filler cap and fill with the specified oil. Oil tank capacity is 11.5 liters (3 gallons). Replace filler
cap and tighten securely.
IMPORTANT: Always make sure the oil tank caps are threaded on tight. An air leak will prevent oil flow
to the engine.

Filling Engine Mounted Oil Reservoir Tank

NOTE: Filling this tank is only necessary if the oil level should ever drop and the low oil warning system
is activated.
1. Remove the top cowl.
2. Loosen the fill cap on the engine oil reservoir tank. Run the engine until all the air has been vented
out of the oil reservoir tank and tank is filled with oil to the point of overflow.
3. Re-tighten the fill cap. Stop the engine and replace the top cowl.
FUEL AND OIL
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