Section 5 - Maintenance
Page 62 90-8M0074352 eng OCTOBER 2012
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.
• 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.
• Recommended Maintenance and replacement of the (PVC) valve.
• Clean the flame arrester, IAC muffler, and the crankcase ventilation hoses.
• 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 mount nuts for tightness and torque if necessary.
• Replace spark plugs.
• Inspect the spark plug wires and replace as necessary.
• Check the electrical system for loose, damaged, or corroded fasteners.
• 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.
• 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 bearings, if equipped with grease fittings.
• Inspect the gimbal bearing for roughness. Replace if necessary. See your certified Mercury
MerCruiser dealer.
• Lubricate the engine coupler.
• Replace the vent valve on each exhaust elbow (port and starboard).
Every 5 years
• Replace the coolant/antifreeze. Replace every two years if not using extended‑life coolant/
antifreeze.
Maintenance Log
Record all maintenance performed on your power package here. Be sure to save all work orders and receipts.
Date
Maintenance Performed Engine Hours
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