Section 4 - Maintenance
90-8M0114081 eng DECEMBER 2015 Page 47
Checking the Coolant Level
IMPORTANT: Check the engine coolant before starting the engine.
1. Allow the engine to cool.
2. Verify that the coolant level is above the "min" mark on the coolant expansion tank.
3. If the coolant level is below the "min" mark:
a. Inspect the closed‑cooling system for leaks. If any leaks are found, contact your Mercury Diesel authorized repair
facility for further diagnosis and repair.
b.
Refer to Adding Coolant and add the specified coolant as necessary.
Adding Coolant
1. Allow the engine to cool.
2. Cover the cap on the coolant expansion tank with a cloth and carefully remove the cap (counterclockwise).
IMPORTANT: If the specified coolant is not immediately available, add only water and restore the proper coolant/water
ratio with the specified coolant as soon as possible. Do not add any coolant other than the specified coolant.
3. Add the specified coolant as necessary to bring the level to the minimum level ("min" mark) but no higher than the coolant
maximum level.
Description
Where Used Part Number
Marine Engine Coolant Closed‑cooling system 8M0078028
4. Install the cap and tighten securely to prevent coolant loss.
Air Filter
Removal
1. Remove the crankcase ventilation hoses.
2. Remove the small clamps from the turbocharger inlets.
3. Remove the large clamps from the air filter.
4. Remove the tension springs from the air filter assembly.
5. Remove the rubber side covers from the air filter element.
Air filter mounting
a - Crankcase ventilation hoses
b - Small clamps
c - Large clamps
d - Tension springs
e - Rubber side covers
Inspection and Cleaning
NOTICE
Do not use fuel, thinner, or other cleaning agents for cleaning the air filter element. Use only the recommended products in
the cleaning kit. Failure to use the correct products can damage the air filter element.
1. Inspect the air filter for damage.
2. Using compressed air, not exceeding 2.0 bar (29 psi), blow debris from the air filter from the inside, toward the outside of
the filter.
3. For cleaning the air filter, purchase K&N® filter recharging kit 99‑5050. Follow the procedures contained in recharging kit.
4. Replace the air filter as needed.
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