Section 4 - Maintenance
Page 46
90-8M0113856
eng
DECEMBER 2015
Task Interval
Maintenance to Be Performed
Every 300 hours or 3
years
•
Check the engine mounts for tightness and torque if necessary.
•
Check the electrical system for loose, damaged, or corroded fasteners.
•
Inspect the condition of the spark plugs, spark plug wires, and the distributor cap and rotor, if
equipped. Replace as necessary. If the condition of these components is satisfactory at
inspection, repeat inspection every 100 hours or once a year, whichever occurs first.
•
Check the cooling system and the exhaust system hose clamps for tightness. Inspect both
systems for damage or leaks.
•
Disassemble and inspect the seawater pump and replace worn components.
•
On models with closed cooling, clean the seawater section of the closed cooling system.
Clean, inspect, and test the pressure cap.
•
Inspect the exhaust system components. If the package was equipped with water shutters
(flapper valves), verify that they are not missing or worn.
•
Check the engine alignment.
•
Inspect the U‑joints, the splines, the bellows, and check the clamps.
•
Lubricate the U‑joint splines and cross bearing, if equipped with a grease fitting.
•
Inspect the gimbal bearing for roughness. Replace if necessary. See your certified Mercury
MerCruiser dealer.
•
Lubricate the engine coupler.
Every 5 years
•
Replace the coolant/antifreeze. Replace every two years if not using extended‑life coolant/
antifreeze.
Scheduled Maintenance Procedures Specifically for 3.0 TKS
Cleaning the Flame Arrestor
!
WARNING
Fuel is flammable and explosive. Ensure that the key switch is off and the lanyard is positioned so that the engine cannot
start. Do not smoke or allow sources of spark or open flame in the area while servicing. Keep the work area well ventilated
and avoid prolonged exposure to vapors. Always check for leaks before attempting to start the engine, and wipe up any
spilled fuel immediately.
1. Disconnect and remove the crankcase ventilation hose from the fitting on the flame arrestor and valve cover.
2. Remove the flame arrestor.
a -
Flame arrestor
b -
Flame arrestor nut and
washer
c -
Crankcase ventilation hose
3. Clean the flame arrestor with warm water and a mild detergent.
4. Inspect the flame arrestor for holes, cracks, or deterioration. Replace if necessary.
5. Allow the flame arrestor to air dry completely before use.
b
a
c
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