Section 4 - Maintenance
Page 40
90-8M0113856
eng
DECEMBER 2015
Task Interval
Maintenance to Be Performed
Every two months or 50
hours of operation
•
Remove the propeller and lubricate the propeller shaft and torque the nut. (If operating only in
freshwater, you can extend the interval to every four months.)
•
If operating in saltwater, brackish water, or polluted water, apply Corrosion Guard to the
power package.
•
Check the battery connections and the fluid level.
•
Ensure that the gauges and the wiring connections are secure. Clean the gauges. (If
operating in saltwater, reduce this interval to every 25 hours or 30 days, whichever occurs
first.)
Scheduled Maintenance
NOTE: Only perform maintenance which applies to your particular power package.
Task Interval
Maintenance to Be Performed
After the initial 20‑hour
break‑in period
Change the engine oil and filter.
Every 100 hours or
annually
(whichever occurs first)
•
Touch‑up the paint on the power package.
•
Change the engine oil and filter.
•
Change the sterndrive gear lube.
•
If the condition of the spark plugs, spark plug wires, and the distributor cap and rotor was
satisfactory at the initial inspection (as listed in
Every 300 hours or 3 years
), inspect the
condition of these components. Replace as necessary.
•
On models with closed cooling, check the coolant level and antifreeze concentration for
adequate freeze protection. Correct if necessary. Refer to the
Specifications
section.
•
Tighten the connection of the gimbal ring to the steering shaft to specifications.
•
Replace the water‑separating fuel filter.
•
Check the steering system and the remote control for loose, missing, or damaged parts.
Lubricate the cables and the linkages.
•
Check the continuity circuit for loose or damaged connections. Test the MerCathode unit
output if equipped.
•
Clean the flame arrestor, IAC muffler, and the crankcase ventilation hoses. Inspect the PCV
valve, if equipped.
•
Inspect the condition and the tension of the belts.
•
Driveshaft extension models: Lubricate the driveshaft U‑joints, and tailstock input and output
bearings.
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.
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