Outboard Maintenance: Greasing Your Outboard Propeller Shaft

Introduction:
Regular maintenance of your outboard propeller shaft is vital for trouble-free boating over the years. Neglecting this crucial task can result in your propeller seizing onto the shaft, making it nearly impossible to remove without causing damage. In this guide, we'll walk you through the steps of properly greasing your propeller shaft and inspecting your propeller for signs of wear and tear, including potential issues like slipping propeller bushes and fishing line entanglement.

Importance of Annual Maintenance:

To ensure your boat's longevity, it's recommended to remove and grease your propeller shaft at least once a year.
This routine maintenance not only prevents seizing but also allows you to inspect your propeller for wear and damage.
Additionally, you can check for fishing line entwined around the propeller shaft, which may harm your gearbox's seals.

Slipping Propeller Bushes:

One common issue with propellers is slipping propeller bushes, often caused by age or impact with underwater obstacles.
To identify slipping bushes, mark the propeller hub with a dot punch during removal. This mark will help you detect any future slippage.
A video demonstration is available to guide you on marking your propeller bush correctly.
Removing Your Propeller:

Safety First:

Ensure that your motor is completely deactivated to prevent unintentional starting or cranking. Remove the ignition keys, disconnect the safety lanyard, and turn off the battery isolation switch.

Steps for Removal:

• Remove the split pin (cotter pin) from the propeller shaft.
• Loosen the propeller nut, and use a block of wood to hold the propeller in place by inserting it between the propeller and the cavitation plate.
• Carefully remove the propeller.
• Take out the thrust washer located in front of the propeller.
• Use a rag to thoroughly clean the old grease from the propeller shaft.
• Inspect the propeller shaft seals for signs of fishing line or damage.

Mark the propeller hub with a dot punch or check existing marks from previous servicing. If the dots do not align, it indicates a slipping or potential slipping propeller hub. In such cases, consider getting your propeller re-bushed or replaced.

Installing Your Propeller:

1. Apply grease to the shoulder of the propeller shaft and install the thrust washer.
2. Ensure the propeller shaft and splines are adequately greased.
3. Carefully slide your propeller onto the shaft and reattach the propeller nut and washer if your motor uses one.
4. Tighten the nut securely.
5. Reinstall the retainer and use a new cotter pin for added security.

By following these steps, you'll ensure that your outboard motor's propeller shaft remains in excellent condition, allowing you to enjoy trouble-free boating for years to come. Don't forget to consult your motor's manual for specific instructions and maintenance intervals.