You have a boat, you want to fish farther and cover more water, but you are stuck on one question: what size trolling motor do I need? It is a common dilemma. Pick a motor with too little thrust, and you will struggle against wind and current. Overshoot the shaft length, and you risk porpoising or poor control. This guide is built for anglers who want a clear, practical answer without the guesswork. We have evaluated six top models from brands like Minn Kota and Newport Vessels to help you match the right motor to your boat. If you are still exploring options, our best trolling motor is a great starting point.
Buying Guide: How to Choose the Right Trolling Motor Size
Thrust: The Power You Need
Thrust is the most critical factor when deciding what size trolling motor you need. Measured in pounds, it determines how much force the motor can generate to push your boat. A general rule: you need about 2 pounds of thrust for every 100 pounds of fully loaded boat weight. For a kayak or canoe, 30 to 36 pounds of thrust is plenty. For a 14-foot jon boat, 45 to 55 pounds works well. Heavier boats, or those used in windy conditions or strong currents, benefit from 68 pounds or more. The Newport NV-Series 36lb Thrust Trolling Motor 12V is a great lightweight option, while the 68LB Thrust Trolling Motor 8 Speed Electric from BODIOO offers more muscle for larger craft. For a deeper dive into jon boat setups, see our best trolling motor for jon boat.
Shaft Length: Reaching the Water Properly
The shaft must be long enough to keep the propeller submerged even in rough water or when the motor is tilted. A short shaft on a high transom will cause cavitation and poor performance. Measure from the top of your transom to the waterline, then add at least 12 inches. For most small boats, a 30-inch shaft is standard. The Newport NV-Series 55lb Thrust Saltwater Transom and the Minn Kota Endura C2 Transom-Mount Electric both offer 30-inch shafts that work well for typical fishing boats. If you have a deeper hull or a raised transom, consider a 36-inch or longer shaft.
Mount Type: Bow vs. Transom
Your mounting choice affects control and maneuverability. Bow mount motors, like the Minn Kota Edge Bow-Mount Electric Trolling Motor, attach to the front of the boat and offer superior steering, especially with a foot pedal. They are ideal for bass boats and anglers who need precise positioning. Transom mount motors are simpler, more affordable, and easier to install on smaller boats. The Newport NV-Series and BODIOO models are transom mounts that work well for kayaks, canoes, and jon boats. If you are unsure, think about how you fish: bow mounts give you hands-free control, while transom mounts are straightforward and portable. For kayak-specific advice, check our top kayak trolling motors for 2026.
Speed and Control Options
Most trolling motors offer multiple forward and reverse speeds. More speeds give you finer control over your presentation, which is crucial for trolling at specific speeds. The Newport NV-Series 55lb Thrust Saltwater Transom has 8 speeds (5 forward, 3 reverse), while the Minn Kota Endura C2 offers the same range. The BODIOO 68LB model also provides 8 speeds with an ergonomic twist-grip handle. For those who fish heavy vegetation, the Minn Kota MKP-6 Weedless Wedge Prop for Trolling can be added to improve performance in thick cover. If you are comparing brands, our Minn Kota vs Newport comparison can help you decide.
Final Thoughts
Choosing the right trolling motor size comes down to matching thrust, shaft length, and mount type to your specific boat and fishing style. For lightweight setups like kayaks and canoes, the Newport NV-Series 36lb Thrust Trolling Motor 12V delivers efficient, quiet power. For larger boats or those facing wind and current, the 68LB Thrust Trolling Motor 8 Speed Electric from BODIOO offers the extra muscle you need. Both are excellent choices that will keep you on the water longer and fishing more effectively.
Frequently Asked Questions
What size trolling motor do I need for a 14-foot boat?
For a 14-foot aluminum boat, a 45 to 55 pound thrust motor is ideal. The Newport NV-Series 55lb Thrust Saltwater Transom is a popular choice that provides enough power for most conditions without being overkill. Pair it with a 30-inch shaft for standard transoms.
Can I use a transom mount motor on a kayak?
Yes, transom mount motors work well on kayaks if you have a mounting bracket or a kayak-specific adapter. The Newport NV-Series 36lb Thrust Trolling Motor 12V is lightweight and easy to install on kayaks and canoes. For more guidance, see our best kayak trolling motors for 2026.
How do I know if my trolling motor shaft is long enough?
Measure from the mounting point to the waterline while the boat is loaded. The propeller should be at least 12 inches below the waterline. If it is less, choose a longer shaft. Most small boats work with a 30-inch shaft, but deeper hulls may need 36 inches or more.
Is a 36-pound thrust trolling motor enough for a small boat?
Yes, for kayaks, canoes, and very small inflatables, 36 pounds of thrust is sufficient. The Newport NV-Series 36lb Thrust Trolling Motor 12V is a great match for these light craft. For slightly larger boats or when fishing in wind, stepping up to 55 pounds provides more confidence.
