Changing; 2.8 Air Filter; Removal; Inspection - Mercury 4.2 Diesel Operation & Maintenance Manual

Changing

Change (replace) the engine coolant at the prescribed interval. See Replacing the Engine Coolant in the Closed‑Cooling
System.

2.8 Air Filter

Removal

1. Remove the retaining nut from the air filter cover.
2. Remove the air filter cover.
NOTE: It is not necessary to remove the air filter bracket mounted on the turbocharger inlet.
3. Remove the air filter cartridge from the air filter bracket mounted on the turbocharger inlet.
a

Inspection

1. The air filter cannot be cleaned. Replace the air filter if it is dirty or contaminated.
2. Replace the air filter if the foam element is deteriorated or torn.
3.
Replace the air filter at the recommended interval. See Maintenance Schedules for the replacement interval under normal
conditions.

Installation

IMPORTANT: Treatment such as partial oil saturation is not required and is not recommended on the foam element before use.
The foam element must be clean and dry for proper filtration.
1. Install the air filter cartridge onto the air filter bracket.
2. Install the air filter cover and retaining nut.
3. Torque the retaining nut.
Description
Air filter cover retaining nut
4.2 Air Filter

Removal

1. Loosen the clamp and remove the oil separator vent hose.
90-8M0113988 DECEMBER 2015
eng
Shown removed from the engine for clarity only
a - Air filter cartridge
b
b - Air filter bracket
12618
Section 4 - Maintenance
Nm lb. in.
10.8 95
Page 45
lb. ft.