Why Shaft Length Matters| The Online Fishing Store

How to Choose the Right Trolling Motor Shaft Length for Your Boat

Selecting the correct trolling motor shaft length is essential to ensure optimal performance, control, and efficiency on the water. A trolling motor with an improperly sized shaft can hinder your ability to navigate, especially in rough waters or when dealing with varying boat heights. At theonlinefishingstore.com, we’re here to guide you through the process of finding the perfect shaft length for your boat.

Why Shaft Length Matters

The trolling motor shaft connects the motor to the water, so its length plays a crucial role in keeping the propeller submerged at an ideal depth. A shaft that’s too short may cause the propeller to come out of the water in choppy conditions, leading to loss of thrust and control. Conversely, a shaft that’s too long can create unnecessary drag, impact maneuverability, and complicate stowing.

Step-by-Step Guide to Selecting the Correct Shaft Length

1. Measure Your Boat’s Freeboard

The first step in choosing the right trolling motor shaft length is to determine your boat's freeboard—the distance from the mounting point of the motor (usually the bow or stern) to the waterline. Freeboard height varies significantly depending on the type of boat:

• Low Freeboard (Jon Boats, Kayaks): Typically under 16 inches.
• Medium Freeboard (Bass Boats, Small Fishing Boats): Between 16–22 inches.
• High Freeboard (Pontoon Boats, Offshore Boats): Over 22 inches.

2. Add Depth for Submersion

To ensure proper performance, the trolling motor’s propeller should remain submerged at least 12 inches below the waterline, even in rough conditions. Add this measurement to your freeboard height to determine the minimum shaft length you’ll need.

3. Refer to a Shaft Length Chart

Most trolling motor manufacturers, including Minn Kota and MotorGuide, provide shaft length recommendations based on freeboard height. Here’s a general guideline to help you:

• 0–16” Freeboard: 36–42” Shaft Length
• 16–22” Freeboard: 42–52” Shaft Length
• 22–28” Freeboard: 52–62” Shaft Length
• Over 28” Freeboard: 62” or longer Shaft Length

Note: Longer shafts are often necessary for high-freeboard boats like pontoons or when fishing offshore in deeper waters.

4. Consider Boat Type and Fishing Conditions

• Bow-Mount Motors: Typically used on bass boats and require accurate measurements to maintain proper submersion at the bow.
• Transom-Mount Motors: Common for smaller boats and easier to size due to proximity to the waterline.
• Rough Waters: If you fish in windy conditions or large lakes with waves, consider adding an extra 5–10 inches to the recommended length to compensate for water fluctuations.

5. Verify Compatibility with Your Trolling Motor

Double-check that the trolling motor shaft length is compatible with the motor and mounting location on your boat. Many adjustable trolling motors allow for fine-tuning shaft height, offering added versatility.

Common Scenarios and Solutions

For a Kayak or Canoe: A short shaft (30–36 inches) is sufficient, as the waterline is close to the mounting point.
For a Bass Boat: Medium shafts (42–52 inches) work well for precise control in calm and moderate waters.
For a Pontoon Boat: Long shafts (52–62 inches) are ideal to compensate for the height difference between the deck and waterline.
For Offshore Fishing Boats: A 72-inch or longer shaft ensures the propeller stays submerged even in rough ocean conditions.

Why Choosing the Right Shaft Length is Critical

Incorrect shaft length can:

• Reduce your trolling motor's efficiency by causing the propeller to break the water's surface.
• Lead to difficulty steering, particularly in rough waters.
• Cause the motor to overwork or underperform, leading to premature wear and tear.

Shop Trolling Motors at The Online Fishing Store

At theonlinefishingstore.com, we offer a wide selection of trolling motors and accessories to suit every type of boat and fishing style. Whether you’re outfitting a kayak, bass boat, or pontoon, we can help you find the right trolling motor shaft length for your needs.

Explore our collection today and enjoy expert advice, competitive prices, and fast shipping. With the perfect trolling motor setup, you’ll be ready to take on your next fishing adventure with confidence and control.