Avoiding Fuel Flow Restriction; Filling Remote Oil Tank; Filling Engine Mounted Oil Reservoir Tank - Mercury 140 Service Manual

After the break-in fuel mixture is used up, it is no longer necessary to add oil with the gasoline.
NOTE: At the end of the break-in period, visually check to see if the oil level in the oil injection tank has dropped.
Oil usage indicates the oil injection system is functioning correctly.
Gas/Oil Ratio 3.8 liters (1 gal.) gas
50:1 (2%)
MIXING GASOLINE AND OIL
Portable Tank - Pour 4 liters (1 gallon) of gasoline into tank. Add the correct amount of oil and mix thoroughly. Add
the remainder of gasoline.
Build-in Tank - Using a funnel, pour the correct amount of oil slowly with the gasoline as tank is filled.

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 galllons). 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
Gasoline/Oil Mixing Ratio Chart
89 ml (3 fl. oz.) oil
11.5 liters (3 gal.) gas
237 ml (8 fl. oz.) oil
or27
23
23 liters (6 gal.) gas
473 ml (16 fl. oz.) oil