Mercury 100 FourStroke, Service Manual

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90-830234R3 DECEMBER 1997 IMPORTANT INFORMATION - 1D-11
Filling The Oil Injection System
1. Open the cowl cap (a). Turn the oil fill cap (b) to
the left and remove.
a
b
2. Use the dipstick (c) to check oil level.
3. Hook the dipstick (d) on the tank during filling.
c
d
4. Slowly fill the oil tank with the specified oil. Do Not
overfill – add only enough oil to bring the oil level
up to the bottom of the fill neck (e).
Note:The oil tank capacity for three cylinder models
is 3.2 qt. (3.0 liters) and four cylinder models is 5.13
qt. (4.9 liters).
5. Install oil filler cap (b) and re-tighten. Reinstall the
cowl cap.
FULL
e
b
Bleeding Air From The Oil Injection
System
IMPORTANT: If air exists in either the oil pump in-
let hose (a) or oil pump outlet hose (b), the air
MUST BE bled from the hose(s) or engine dam-
age may occur.
BLEEDING AIR FROM THE OIL PUMP INLET
HOSE
1. With the engine not running, place a shop towel
below the oil pump.
2. Loosen bleed screw (c) four turns and allow oil to
flow out of the bleed hole until no air bubbles exist
in the inlet hose (a).
BLEEDING AIR FROM THE OIL PUMP OUTLET
HOSE
3. If any air bubbles are present in the outlet hose
(b), they can be purged from the hose by remov-
ing link rod (d) from the oil pump and rotating the
pump arm (e) full clockwise while operating en-
gine at 1000 to 1500 RPM.
b
c
a
d
e