Section 5 - Maintenance
90-899883272 MARCH 2008 Page 53
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.
• Tighten the connection of the gimbal ring to the steering shaft to
specifications.
• Replace the water‑separating fuel filter element.
• 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. If the package
is equipped with a MerCathode, test the MerCathode unit output.
• Clean the flame arrestor, IAC muffler (MPI engines), and the crankcase
ventilation hoses. Inspect the PCV valve, if equipped.
NOTE: On MerCruiser V6 models, the PCV valve is a non‑serviceable, internal
component of the valve cover assembly.
• Inspect the condition and the tension of the belts.
• Check the coolant level and antifreeze concentration for adequate freeze
protection. Correct if necessary. Refer to the Specifications section.
• On driveshaft extension models, lubricate the driveshaft U‑joints and
tailstock input and output bearings.
Every 200 hours or 3
years
• Inspect the U‑joints, the splines, and the bellows. Check the clamps.
• Check the engine alignment.
• Lubricate the U‑joint splines and cross bearing, if equipped with grease
fittings.
• Lubricate the gimbal bearing and the engine coupler.
NOTE: Lubricate the engine coupler every 50 hours if operated at idle for
prolonged periods of time.
Every 300 hours or 3
years
• Check the engine mounts for tightness and tighten to specifications if
necessary.
• 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 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.
Every 5 years
• Replace the coolant/anitifreeze. 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.
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