MerCruiser 8.1 MAG, Owner'S Manual

Page: 74 / 152

Section 5 - Maintenance
Page 66 90-864839070 AUGUST 2007
Task Interval Maintenance to Be Performed
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.
• 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.
Date Maintenance Performed Engine Hours