How to Measure Trolling Motor Shaft Length

To measure trolling motor shaft length, measure from the mounting surface to the waterline. This will give you the correct shaft length needed for your boat’s transom height.

Choosing the proper shaft length for your trolling motor is important to ensure optimal performance and efficiency on the water. The shaft length determines how deep your motor sits below the waterline, which affects how well it can steer and propel your boat.

Measuring the shaft length is a straightforward process that requires only a measuring tape or ruler. In this article, we will guide you through the steps to determine the correct trolling motor shaft length for your boat’s transom height. By following these guidelines, you will be able to make an informed decision when selecting a trolling motor for your vessel.

Credit: www.thehulltruth.com

Understanding Trolling Motor Shaft Length

Definition Of Trolling Motor Shaft Length

A trolling motor is an essential piece of equipment for any angler trying to catch fish. Trolling motors come in different sizes and shapes, making it challenging to pick the perfect trolling motor for your boat. The trolling motor’s length is one of the most critical measurements that you need to take into consideration when choosing a trolling motor.

The trolling motor shaft length is the distance between the motor and the water. It determines how deep the propeller goes into the water.

Common Types Of Trolling Motor Shaft Lengths

The trolling motor shaft length is available in a variety of specifications, with the most common sizes ranging between 36-72 inches in length. The following are the most common trolling motor shaft lengths:

• 36 inches trolling motor shaft length is ideal for smaller boats, especially dinghies and tenders.
• 42 inches trolling motor shaft length is suitable for boats that are 14 feet long and below.
• 48 inches trolling motor shaft length is the most popular size and suitable for boats that are between 14 and 16 feet long.
• 54 inches trolling motor shaft length is suitable for boats ranging from 16 to 18 feet in length.
• 60 inches trolling motor shaft length is recommended for boats that are around 18 to 20 feet long.
• 72 inches trolling motor shaft length is ideal for boats that are over 20 feet long.

Factors To Consider When Selecting An Appropriate Trolling Motor Shaft Length

Choosing the right trolling motor shaft length requires careful consideration of various factors. Here are the most important factors to consider when selecting an appropriate trolling motor shaft length:

• Boat size: The length of your boat determines the size of the trolling motor shaft length you need. Taller boats require longer shaft lengths, while shorter boats require shorter shaft lengths.
• Water condition: The depth of the water, and the type of water, including saltwater or freshwater, will affect your selection.
• Motor power: The power of your motor affects your trolling performance and efficiency. If you have a powerful motor, you will need a longer shaft to push your boat effectively.
• Mounting position: Your mounting position depends on the type of boat you own. Determining the length required for the trolling motor shaft is crucial to ensure it works efficiently.
• Propeller diameter: If you have a larger propeller diameter, you will need a longer trolling motor shaft length to reach the waterline.

Understanding the trolling motor shaft length is essential when purchasing the appropriate trolling motor for your boat. Ensure to consider the boat size, water condition, motor power, mounting position, and propeller diameter before selecting the ideal shaft length.

Tools Needed To Measure Trolling Motor Shaft Length

If you are a newbie angler, the world of trolling motors may seem a bit complicated. Trolling motor shaft length is one crucial aspect you need to get right when choosing a suitable trolling motor. The length of the shaft significantly determines how deep the propeller goes in the water.

Hence, choosing the right length translates to better control of your boat in different water conditions. Fortunately, measuring trolling motor shaft length is relatively easy, and you only need a few tools to get the precise measurement you need.

Essential Tools Needed To Measure The Shaft Length

Before you start measuring your trolling motor shaft length, make sure you have the following tools:

• Tape measure or ruler with metric markings: You need a tape measure or ruler with metric markings to take precise measurements.
• Bow eye or a similar eye hook: This is an essential tool that helps you keep the boat in place during the measurement process.
• Level: To ensure that your trolling motor is precisely leveled on your boat, you need a level. This allows the trolling motor propeller to sit vertically in the water.
• Helper: It’s always good to have a second person to assist you in holding the trolling motor steady during the measurement process.

Explanation Of Each Tool

• Tape measure or ruler with metric markings: A tape measure is a flexible ruler that can measure distances with precision. A metric ruler or tape measure has markings in millimeters and centimeters, making it perfect for measuring the shaft length of your trolling motor.
• Bow eye or a similar eye hook: A bow eye is a small hook mounted on the bow of your boat that allows you to tether the boat to a post or dock. When measuring the trolling motor shaft length, you attach a rope or a tie-down strap to the bow eye to keep the boat stationary.
• Level: A level is a tool that helps you determine whether a surface is perfectly horizontal or vertical. In this case, you need a level to ensure that your trolling motor is precisely level on your boat, which is crucial for accurate measurements.

Brief Discussion Of How To Measure The Trolling Motor Shaft Length

To manually measure trolling motor shaft length, follow the steps below:

• Start by making sure that the boat is on a level surface and is securely held in place using a tie-down strap attached to the bow eye.
• Attach the trolling motor to the bow of your boat and make sure it is level using a level.
• Measure the distance between the top of the trolling motor and the waterline using a tape measure. This distance gives you the shaft length.
• Repeat the process at least twice and ensure that the measurements are consistent. If the measurements vary, take the average of the readings.
• Once you have the correct measurements, you can now shop for the right trolling motor based on the shaft length you have measured.

There you have it! By following these simple steps, you can quickly and accurately measure the trolling motor shaft length without any hassle. With the right tools and some careful measurements, you can ensure that you purchase a trolling motor that is the perfect fit for your boat.

So, next time you’re out fishing, make sure to show off your newfound skills and knowledge.

How To Measure Trolling Motor Shaft Length: Step-By-Step Guide

Trolling motors are essential for smooth and noise-free boat rides. Proper measurement of the trolling motor shaft length is vital to ensure maximum efficiency and performance. In this step-by-step guide, we will explain how to measure trolling motor shaft length accurately.

Step 1: Preparing The Boat For Measurement

Before measuring, prepare the boat by following these steps:

• Move the boat to a flat and open area.
• Ensure that the boat is clean and free from any debris or obstructions.
• Position the boat in a straight line with the transom facing you.
• Ensure that the boat is in a stable position.

Step 2: Taking Measurements

Now, it’s time to take precise measurements of your trolling motor’s shaft. Follow these steps:

• Measure the distance from the transom to the waterline of the boat, using a measuring tape.
• Then measure the distance from the waterline to the top of the bow or the highest point on the gunnel where your trolling motor will mount.
• Subtract the second measurement from the first to get the depth of your boat.
• Add 16 inches to the depth measurement to get the ideal shaft length for your trolling motor.

Step 3: Evaluating Measurements

After taking the necessary measurements, evaluate them to ensure they are accurate. Consistency in measurements is essential, as even a slight error may cause performance issues.

Step 4: Determining The Appropriate Trolling Motor Shaft Length

When calculating the appropriate shaft length for your trolling motor, ensure that it matches your boat’s depth. Here are some general guidelines:

• If the depth of your boat is less than 16 inches, choose a trolling motor with a 36-inch shaft length.
• For a boat with a depth of 16-22 inches, choose a trolling motor with a shaft length of 42 inches.
• If the depth of your boat is between 22-28 inches, a 48-inch shaft length is ideal.
• For boats with a depth of more than 28 inches, opt for a trolling motor with a 54-inch or 60-inch shaft length.

By following the steps mentioned above, you can now measure and select the appropriate trolling motor shaft length for your boat. Ensure that you follow the manufacturer’s guidelines for mounting and installation to maximize the efficiency and performance of your trolling motor.

Tips And Tricks For Measuring Trolling Motor Shaft Length

Essential Tips For Accurate Measurements

If you’re looking to purchase a trolling motor or replace the current one, measuring the shaft length is crucial for the perfect fit. The following essential tips will help you get accurate measurements:

• Use a measuring tape instead of a ruler for precise measurements.
• Measure from the top of the mounting bracket to the waterline in the boat.
• Measure the shaft from the top of the mounting bracket to the bottom of the motorhead.
• Ensure the boat is properly weighted with people and gear.
• Do not include the propeller in your measurements.

Common Mistakes To Avoid

Common mistakes when measuring trolling motor shaft length can lead to the wrong motor size for your boat. The following are common mistakes to avoid:

• Not measuring from the mounting bracket to the waterline, leading to an inaccurate measurement.
• Measuring the entire motor length instead of just the shaft.
• Forgetting to factor in the weight of the gear you typically carry on your boat.
• Measuring without the boat in the water can lead to incorrect measurements.

Expert Recommendations For Measuring Trolling Motor Shaft Length

For expert recommendations on measuring trolling motor shaft length, keep the following tips in mind:

• When measuring, make sure the motor is in a vertical position.
• For those with transom-mounted motors, add an extra 5 inches to the measurement to ensure proper clearance in rough waters.
• Check the manufacturer’s manual for recommendations on measuring their specific trolling motors.
• It’s always best to double-check your measurements before purchasing a motor to avoid any mistakes.

Other Considerations For Optimal Performance

To ensure optimal performance with your trolling motor, consider the following:

• Electric motors are best suited for smaller boats, while gas-powered motors are better suited for larger boats.
• The length of your boat also affects the size of the motor needed.
• Choose a motor with enough thrust to move your boat through the water – don’t be afraid to go larger.
• Properly sizing your trolling motor will lead to longer battery life and better performance.

Measuring the trolling motor shaft length accurately is crucial for the optimal performance of your boat. By keeping these tips and tricks in mind, you’ll be sure to find the perfect fit for your boat.

Frequently Asked Questions On How To Measure Trolling Motor Shaft Length

How Do I Measure The Shaft Length For My Trolling Motor?

To measure the trolling motor shaft length, measure the distance between the mounting surface and the waterline. Ensure the measuring tape is straight and level. Add 16-20 inches to the number obtained to get the shaft length.

How Does The Trolling Motor Shaft Length Affect My Boat?

The trolling motor shaft length affects the position of the propeller in the water. If the shaft is too long, it can cause uncomfortable boat handling and instability. If the shaft is too short, it can cause drag, reducing the boat’s efficiency.

What Factors Should Be Considered When Choosing A Trolling Motor Shaft Length?

Several factors influence the choice of trolling motor shaft length, including water conditions, boat type, motor weight, and boat transom height. The depth of the water can also impact the choice of shaft length, with deeper waters requiring longer shafts.

Can I Use A Shorter Shaft Length If I Mostly Fish In Shallow Waters?

It is possible to use a shorter shaft if the water is shallow and calm. However, if the water is choppy, windy or deeper than 18 inches, a longer shaft length is necessary to keep the propeller submerged and prevent drag on the boat.

How Can I Determine The Best Trolling Motor Shaft Length For My Boat?

To determine the best trolling motor shaft length, consider the boat’s transom height, motor weight, expected water conditions, and the type of boat. It is best to consult the manufacturer’s recommendations for the trolling motor and the boat.

Conclusion

After reading this article, you can confidently pick the correct trolling motor shaft length for your vessel. Measuring the shaft length correctly is crucial in ensuring your trolling motor functions efficiently and performs optimally. Keep in mind that the length of the shaft determines how deep the propeller sits in the water, which can significantly affect control and speed.

By following the steps outlined, you can determine the right length for your trolling motor shaft. Remember to measure your vessel’s transom height and add the required length; this will guide you in choosing the appropriate trolling motor shaft. A well-fitting trolling motor shaft is essential for a successful fishing trip, so take the time to measure and get it right.

We hope this article has been informative and helpful in your trolling motor shaft search. Happy fishing!