Section 5 - Maintenance
Page 86 90-864197084 NOVEMBER 2008
Task Interval Maintenance to Be Performed
Every 50 hours or 2
months
(whichever occurs first)
All Bravo models except 496 : Lubricate the engine coupler (lubricate the engine coupler every 50
hours if operated at idle for prolonged periods of time).
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.
• 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 150 hours or
annually
(whichever occurs first)
All Bravo models except 496: Lubricate the engine coupler.
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.
• 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 gimbel bearing for roughness. Replace if necessary. See your certified Mercury
MerCruiser dealer.
• Vazer models, Alpha models, and 496 MAG Bravo models only: Lubricate the engine coupler.
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
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