how to measure shaft on trolling motor

2 min read 18-01-2025

Knowing how to accurately measure your trolling motor shaft is crucial for selecting the right replacement parts or mounting hardware. An incorrect measurement can lead to compatibility issues and even damage your boat. This guide will walk you through the process, covering different shaft types and potential challenges.

Understanding Trolling Motor Shaft Types

Before you begin measuring, it's important to understand the different types of trolling motor shafts:

Telescoping Shafts: These shafts extend and retract, offering adjustable length. Measuring these requires extra care, as you need to determine both the minimum and maximum extended lengths.
Fixed Shafts: These shafts have a fixed length. Measuring is straightforward, but ensure the measurement is taken when the shaft is fully extended if applicable.

Tools You'll Need

Measuring accurately requires the right tools:

Measuring Tape: A flexible tape measure is ideal, allowing for accurate measurements along the curved shaft. A metal tape measure might be preferable for rigidity.
Pencil: Mark measurement points for clarity, especially on telescoping shafts.
Helper (Optional): For longer shafts, a second person can hold the tape measure steady while you record the measurement.

Step-by-Step Guide to Measuring Your Trolling Motor Shaft

1. Prepare the Motor: Ensure the trolling motor is securely mounted and the shaft is fully extended to its operational position. Clean any debris from the shaft to ensure an accurate measurement.

2. Identify the Measurement Points: Determine where to begin and end your measurement. For fixed shafts, measure from the top of the mounting bracket to the tip of the shaft. For telescoping shafts, measure the fully extended and fully retracted lengths separately. Always note which measurement is which.

3. Take the Measurement: Carefully use your measuring tape to measure the distance between the designated points. Ensure the tape measure is taut but not overly stretched.

4. Record Your Measurement: Write down your measurement clearly, including units (inches or centimeters). If dealing with a telescoping shaft, record both the extended and retracted lengths. Include the type of shaft (telescoping or fixed) in your notes for clarity.

5. Double-Check Your Measurement: Repeat steps 3 and 4 to confirm accuracy. Discrepancies could indicate a measurement error.

Troubleshooting Common Measurement Challenges

Curved Shafts: For slightly curved shafts, follow the curve of the shaft with the tape measure. Don't force it straight.
Obstacles: If there are obstacles preventing a direct measurement, you might need to take multiple measurements and add them together.
Telescoping Shaft Sections: If a telescoping shaft has multiple sections, measure each section independently and record each length. Then add them to find the total length when fully extended.

Choosing the Right Replacement Parts

Once you have accurately measured your trolling motor shaft, you can use this information to select the correct replacement parts, such as a new shaft or mounting hardware. Always cross-reference your measurements with the specifications of the replacement parts to ensure compatibility.

Conclusion

Accurately measuring your trolling motor shaft is a simple yet crucial step for maintenance and repairs. By following these steps and paying attention to the details, you can ensure a successful replacement or repair, keeping your trolling motor running smoothly. Remember to always consult your trolling motor's manual for specific instructions and recommendations.