Every 100 Hours Or Annually (Whichever Occurs First); Every 200 Hours Or 3 Years; Every 300 Hours Or 3 Years; Every 5 Years - MerCruiser 4.3L TKS Sterndrive Owner's Manual

Section 5 - Maintenance

Every 100 Hours or Annually (Whichever Occurs First)

• Touch‑up the paint on the power package.
• Change the crankcase oil and filter.
• Change the drive unit oil
• Retorque the connection of the gimbal ring to the steering shaft.
• 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. Test the MerCathode unit output on Bravo Models.
NOTE: On V6 models the PCV valve is non serviceable and is an internal component of the valve cover assembly.
• Clean the flame arrestor, IAC muffler (MPI engines), 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 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 a grease fitting.
•
Lubricate the gimbal bearing and the engine coupler.

Every 300 Hours or 3 Years

• Check the engine mount for tightness and retorque if necessary.
• Check the distributor cap, if equipped.
• 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 and verify that the flapper valves are not missing or worn, if equipped.

Every 5 Years

• Replace the coolant (every two years if extended life antifreeze coolant is not being used).

Maintenance Log

Record all maintenance performed on your power package here. Be sure to save all work orders and receipts.
Date Maintenance Performed
2. Lubricate the engine coupler every 50 hours if operated at idle for prolonged periods of time.
Page 44
2.
Engine Hours
90-8M0053265 NOVEMBER 2010