When your boat pushes past 18 feet, a lightweight trolling motor simply won’t cut it. You need serious thrust to hold position against wind and current, and a shaft long enough to stay submerged in rough water. That’s where the best trolling motor for large boats comes into play, and in this guide, we’ll break down the top contenders.

Whether you’re a bass angler on a big reservoir or a saltwater enthusiast chasing stripers, the right motor can make or break your day on the water. We’ve evaluated the latest models from trusted brands like Minn Kota and Newport Vessels, focusing on thrust, shaft length, and control features. For a deeper dive into bow-mount options, check out our minn kota vs garmin trolling motor.

Buying Guide: What to Look For in a Large Boat Trolling Motor

Thrust: The Engine of Your Trolling Motor

Thrust is the pulling power measured in pounds. For large boats (over 18 feet), you’ll need at least 70 lb of thrust, but 80 lb or more is often recommended for heavier fiberglass hulls or when fishing in strong currents. The Newport NV-Series 86lb Thrust Trolling Motor 24V delivers maximum power for demanding conditions, while the Minn Kota Riptide PowerDrive offers 70 lb with GPS features.

A good rule of thumb: the heavier and longer your boat, the more thrust you need. Don’t underestimate the wind and current on big water. If you’re unsure, step up a size, as more thrust provides better control and safety.

Shaft Length: Keeping the Prop Deep

The shaft length determines how deep the propeller sits in the water. For large boats with high freeboards, a longer shaft (45 to 54 inches) is essential to avoid cavitation and maintain bite in waves. The Minn Kota Edge Bow-Mount with 45-inch shaft is a solid choice, while the Riptide PowerDrive offers a 54-inch shaft for deeper hulls.

Measure the distance from your mounting point to the waterline and add at least 12 inches. That’s your minimum shaft length. For bow-mount motors, also consider the angle of the bow; a longer shaft gives you more flexibility.

Mount Type: Bow vs. Transom

Bow-mount motors, like the Minn Kota Edge and Riptide PowerDrive, offer better maneuverability and are easier to control with a foot pedal or remote. They’re ideal for fishing, as they allow you to keep your hands free. Transom-mount motors, like the Newport NV-Series, are simpler and more affordable, but they may not provide the same level of precision in rough conditions.

If you’re fishing in open water, a bow-mount with GPS features like Spot-Lock is a game-changer. For casual cruising or smaller large boats, a transom mount may suffice. Check out our best foot controlled trolling motor guide for more bow-mount insights.

Control and Features: From Basic to High-Tech

Consider how you want to steer and control speed. Basic motors offer 5 forward and 3 reverse speeds, while advanced models feature wireless remotes, GPS anchoring, and digital power management. The Minn Kota Riptide PowerDrive with wireless remote and Spot-Lock is perfect for tech-savvy anglers who want to hold position effortlessly.

Battery indicators are also crucial for large boats, as you’ll likely be running multiple electronics. The Newport NV-Series models come with LED battery meters, helping you avoid getting stranded. For more on power, see our best deep cycle battery for trolling motor guide.

Final Thoughts

Choosing the best trolling motor for large boats ultimately comes down to your specific needs: for all-out power and saltwater durability, the Newport NV-Series 86lb Thrust Trolling Motor 24V is a beast, while the Minn Kota Riptide PowerDrive Bow-Mount Electric offers advanced GPS features and precision control for serious anglers. Both are excellent choices, so weigh your priorities and get ready for a better day on the water.

Frequently Asked Questions

What size trolling motor do I need for a 20-foot boat?

For a 20-foot boat, you’ll want at least 70 lb of thrust, but 80 lb or more is recommended for heavier fiberglass hulls or when facing wind and current. Consider a 24V system for better efficiency. Our best boat battery guide can help you power it.

Is a bow-mount trolling motor better for large boats?

Yes, bow-mount motors are generally better for large boats because they offer superior maneuverability and allow for hands-free control with foot pedals or remotes. They’re especially useful for fishing, as you can precisely position the boat without moving to the stern.

How much thrust do I need for saltwater fishing?

Saltwater fishing often involves stronger currents and heavier boats. For large saltwater boats, 80 lb or more of thrust is recommended. Look for motors with corrosion-resistant materials, like the Newport NV-Series saltwater models, to withstand harsh conditions.

Can I use a 12V trolling motor on a large boat?

While some 12V motors offer up to 62 lb of thrust, they may struggle with larger boats. For best performance, a 24V system (like the Newport 86lb Thrust) provides more power and efficiency. Always check your boat’s weight and typical conditions before choosing a voltage.

For more options, check out our best cheap trolling motors and best budget trolling motor with spot lock guides. And don’t forget to explore our bow mount trolling motors category for more in-depth reviews.