Folding Propeller Cleaning and Winterizing
How to Disassemble, Inspect, and Maintain a Martec Folding Propeller
Proper folding propeller cleaning and winterizing helps maximize performance, reduce corrosion, and ensure reliable blade operation before launch or winter storage. These instructions apply only to the Martec MARK II Explorer and MARK III Eliptec folding propellers.
How to Disassemble
- Close the blades and remove the two cotter pins securing the pivot pin. Tap out the pivot pin and remove the blades.
- Remove the two cotter pins retaining the recessed shaft nut.
- Using the correct socket extension, loosen (do not fully remove) the shaft nut by turning it counterclockwise. Stand to one side, as the hub may release suddenly.
- Gently tap the forward end of the hub with a brass punch and hammer to separate the tapered hub from the shaft. Avoid excessive force. If the hub remains stuck, use a wheel puller. If removal is still unsuccessful, consult a qualified marine technician.
- As the hub is removed, retain the bronze shaft key for reinstallation.
Clean, Inspect, and Polish
Thoroughly clean all blades, pivot pins, hub surfaces, and hardware to remove marine growth, salt, grease, and corrosion. Inspect for worn pivot holes, scoring, cracks, or damaged components, then polish all metal surfaces before reassembly. Regular maintenance is especially important for a 3-blade folding propeller to ensure smooth blade movement and efficient operation.
Diagnostic Check
After cleaning, operate each blade by hand. If you notice excessive play, loose components, binding, or persistent vibration, do not reinstall the propeller. These symptoms indicate wear that requires Martec's specialized proprietary refurbishment service to restore proper tolerances and performance.
Many sailors comparing max-prop feathering propeller alternatives also prioritize ease of maintenance and long-term serviceability when selecting a folding propeller.
Many sailors comparing max-prop feathering propeller alternatives also prioritize ease of maintenance and long-term serviceability when selecting a folding propeller.