Trolling Motor for a Pontoon Boat: Thrust, Shaft and Mount
Trolling motor for a pontoon boat: thrust from real pontoon weights, shaft length from deck height, mounts, wiring runs and October 2026 models.
System Planner
Boat weight, conditions and hours in: thrust, voltage, battery bank, runtime, wire gauge, breaker and charger out.
A pontoon boat can take a bow-mount trolling motor like any fishing boat, but three things change the choice. Pontoons are heavy, so they need more thrust and usually 24 or 36 V. Their decks sit high above the water, so they need long shafts. And their batteries often live at the back, so the wire run to the front deck is long. This guide works each one with published numbers.
What size trolling motor does a pontoon boat need?
Start from fully loaded weight: Minn Kota’s rule is at least 2 lb of thrust per 100 lb, and most loaded fishing pontoons land in the 70 to 112 lb classes. Loaded weight means hull, outboard, fuel, people, gear and the trolling batteries.
Two worked examples using Lowe’s published “approx basic hull weight” for its LF fishing pontoons, checked 2026-10-06. The other weights are our assumptions, labeled:
| Lowe LF 172 (17 ft 10 in) | Lowe LF 214 (22 ft) | |
|---|---|---|
| Hull (Lowe) | 1,720 lb | 2,065 lb |
| Outboard, fuel and rigging (assumed) | 400 lb | 550 lb |
| People (assumed) | 4 x 175 = 700 lb | 6 x 175 = 1,050 lb |
| Gear (assumed) | 150 lb | 200 lb |
| Trolling batteries (assumed 65 lb each) | 2 = 130 lb | 3 = 195 lb |
| Loaded weight | 3,100 lb | 4,060 lb |
| Minimum thrust, calm (2 lb per 100 lb) | 62 lb: 70 lb class, 24 V | 81 lb: 101 lb class, 36 V |
| Moderate wind (x1.25) | 78 lb: 80 lb, 24 V | 102 lb: 112 lb, 36 V |
| Strong wind (x1.5) | 93 lb: 101 lb, 36 V | 122 lb: above the largest class |
Thrust rounded up to the next Minn Kota class. The wind multipliers are our heuristic, not a manufacturer figure.
Minn Kota also publishes a simpler chart by total boat weight: 2,600 to 3,599 lb calls for 70 to 80 lb at 24 V, and 3,600 to 4,599 lb for 80 to 90 lb at 24 V, with 36 V from 4,600 lb. Its chart is a little less demanding than the 2 lb rule at the top of each band, and Minn Kota adds that wind or current calls for extra thrust. The System Planner runs this for your own boat.
Why do pontoons usually need 24 or 36 volts?
Because the thrust classes a pontoon needs only exist at 24 and 36 V: Minn Kota tops out at 55 lb on 12 V, 70 to 80 lb on 24 V and 101 to 112 lb on 36 V. A 55 lb, 12 V motor covers about 2,750 lb loaded by the 2 lb rule, which few fishing pontoons stay under.
Each 12 V step adds one battery, wired in series, and the batteries must match in make, type, size and age. That is two batteries for 24 V and three for 36 V, plus a multi-bank charger. The trade-offs are laid out in 12 vs 24 vs 36 volt trolling motors, and bank size and runtime in trolling motor battery sizing.
Minn Kota’s brushless QUEST motors (90 lb at 24 V, 115 lb at 36 V) sit between the brushed classes. A 90 lb, 24 V motor matches the top of Minn Kota’s 3,600 to 4,599 lb band without a third battery.
What shaft length does a pontoon trolling motor need?
Measure from where the motor mounts to the waterline, then read the maker’s chart; most pontoon decks call for a 48 to 60 inch shaft. Too short and the prop breaks the surface in a chop.
Minn Kota’s bow-mount shaft chart (checked 2026-10-06):
| Bow to waterline | Recommended shaft |
|---|---|
| 16 to 22 in | 42 to 45 in |
| 22 to 28 in | 48 to 52 in |
| 28 to 34 in | 54 to 60 in |
| 34 to 52 in | 72 to 87 in |
| 52 to 72 in | 100 in |
Minn Kota’s rules beside the chart: submerge the center of the motor at least 12 inches, add 5 inches for rough water, and add 9 inches for hand-control bow mounts. Its Pontoon PowerDrive ships with a 48 inch shaft, which sits in the 22 to 28 inch row, so a pontoon with a higher deck needs a longer motor. Garmin’s Force Kraken offers 63, 75 and 90 inch shafts for high decks; its chart is in bow mount vs transom mount. Measure your own boat with a typical load aboard.
Which trolling motors are made for pontoons?
Minn Kota and MotorGuide both list pontoon versions, and any bow mount with the right shaft can work on a pontoon deck. Listings checked 2026-10-06:
| Motor | Control | Thrust, voltage | Shaft | GPS anchor | Price (Oct 2026) |
|---|---|---|---|---|---|
| Minn Kota Pontoon PowerDrive | Corded foot pedal, electric steering | 55 lb 12 V or 70 lb 24 V | 48 in | No | dealer price |
| MotorGuide X3 Pontoon | Hand control | 55 lb or 70 lb | 50 in | No | dealer price |
| MotorGuide Xi3 Wireless Pontoon | Wireless remote | 54 lb or 68 lb | 48 in | Not in the listing name; Pinpoint GPS is sold on other Xi3 models | dealer price |
| Minn Kota PowerDrive | Micro Remote with Spot-Lock, or foot pedal | 70 lb 24 V | 54 or 60 in | Yes on remote models | $1,399.99-$1,749.99 with sonar |
| Minn Kota Terrova | Wireless remote and foot pedal | 55 lb 12 V, 80 lb 24 V, 112 lb 36 V | 45, 54, 60, 72 in | Spot-Lock | $1,849.99-$2,199.99 without sonar |
PowerDrive and Terrova prices from Scheels; the pontoon-specific models showed no price on the makers’ sites that day.
Minn Kota’s Pontoon PowerDrive includes a deploy-assist lever and an MKA-16-03 quick release bracket; the 70 lb version weighs 41 lb and draws up to 42 A. If you want the motor to hold the boat on a spot, the pontoon model is not the one; see spot-lock trolling motors compared, and the Minn Kota model lines in Terrova vs Ultrex vs Ulterra.
Where do you mount a trolling motor on a pontoon?
On the front deck, bolted through a solid section, positioned so the lower unit deploys clear of the tube nose cones and the stowed motor does not block the gate. Pontoon decks are often plywood over aluminum cross members, so the bolts need a backing plate underneath.
Mounting hardware made for pontoons:
- Newport’s Trolling Motor Deck Mount for Pontoon Boats ($154.99, Oct 2026) needs an 8 by 6 inch flat mounting surface and lists the shaft diameters it fits.
- Minn Kota’s quick release brackets (MKA-16-03 ships with the Pontoon PowerDrive; $79.99 at Scheels) let you lift the motor off for trailering.
- Deck reinforcement: Minn Kota sells an MKA-58 Boat Deck Reinforcement Kit ($249.99 at Scheels) for reinforcing the deck under the mount.
Check that the motor clears the fence and deck furniture when stowed. Step-by-step installation is covered in how to mount a bow trolling motor, and the motor’s own installation manual governs the hardware.
How do you wire a trolling motor on a long pontoon?
Keep the run short by putting the trolling batteries near the front deck, and size the wire from Minn Kota’s table for the actual distance. If the batteries sit at the stern beside the outboard’s starting battery, the run to the bow of a 20 ft pontoon can approach or pass 25 ft.
Minn Kota’s conductor table at the longer distances (battery to motor leads):
| Motor | 15 ft | 20 ft | 25 ft | Breaker |
|---|---|---|---|---|
| 55 lb, 12 V | 4 AWG | 4 AWG | 2 AWG | 60 A |
| 70 lb, 24 V | 8 AWG | 8 AWG | 6 AWG | 50 A |
| 80 lb, 24 V | 8 AWG | 6 AWG | 6 AWG | 60 A |
| 112 lb, 36 V | 8 AWG | 8 AWG | 8 AWG | 60 A |
Beyond 25 ft, Minn Kota recommends a qualified marine technician. A 12 V motor at 25 ft needs heavy 2 AWG cable, one more reason higher voltage suits pontoons. Breakers, plugs and the voltage-drop math are in the trolling motor wiring guide.
When is a pontoon too much for a trolling motor?
When a heavy, high-sided pontoon meets strong wind: the 112 lb, 36 V class is the top of the range, and Minn Kota notes results vary in extreme conditions and on large vessels. The second worked example above already exceeds 112 lb in strong wind.
A pontoon’s fences and canopy catch wind like a sail, so on breezy days even a correctly sized motor may only slow the drift. Options:
- Fish with the wind, using the motor to steer the drift rather than fight it.
- Hold in shallow water with an anchor; pontoon deck brackets exist for some shallow-water anchors, covered in shallow-water anchors compared.
- Use the main engine to reposition, and the trolling motor only for fine control.
Who is this guide not for?
This is for fishing pontoons up to about 24 ft that want a bow-mount trolling motor. Large tritoons carrying a full load of passengers, and anyone wanting the boat’s main propulsion to be electric, need a different answer; electric outboards are compared in electric boat motors.
We did not test these motors on a pontoon. Weights come from Lowe’s published specifications, sizing from Minn Kota’s published rule, chart and conductor table, and models and prices from the makers and Scheels, all checked on 2026-10-06. The added weights and wind multipliers are labeled assumptions.
Frequently asked questions
Quick answers to what anglers ask us most
What size trolling motor do I need for a pontoon boat?
Use at least 2 lb of thrust per 100 lb of fully loaded weight, then more for wind. A loaded 18 ft fishing pontoon around 3,100 lb needs 62 lb in calm water, so a 70 or 80 lb, 24 V motor; a loaded 22 ft pontoon around 4,000 lb points to 36 V and 112 lb.
What shaft length does a pontoon trolling motor need?
Measure from the mounting surface to the waterline. On Minn Kota's bow-mount chart, 22 to 28 inches calls for a 48 to 52 inch shaft and 28 to 34 inches for 54 to 60 inches. Add 5 inches for rough water. Minn Kota's Pontoon PowerDrive ships with a 48 inch shaft.
Where do you mount a trolling motor on a pontoon?
On the front deck, bolted through a solid section, so the motor deploys clear of the tube nose cones and does not block the gate. Pontoon brackets such as Newport's deck mount ($154.99) or Minn Kota's quick release bracket spread the load and let you remove the motor.
Can a 12 volt trolling motor push a pontoon?
Only a light pontoon in calm water. A 55 lb, 12 V motor covers about 2,750 lb loaded by Minn Kota's 2 lb per 100 lb rule, and most fishing pontoons weigh more than that with people, fuel and gear aboard.
Do pontoon trolling motors come with spot-lock?
Some do. Minn Kota's Pontoon PowerDrive has no Spot-Lock, but the standard PowerDrive with Micro Remote and the Terrova both offer it, and Terrova comes in 54, 60 and 72 inch shafts for higher decks.