Garmin Brushless Trolling Motor Technology — Why It Matters for Serious Anglers

Garmin Brushless Trolling Motor Technology — Why It Matters for Serious Anglers

30-Second Answer

Garmin Force Kraken uses a brushless electric motor rather than the carbon brushes and commutator found in traditional brushed DC motors.

For anglers, the practical advantages are greater electrical efficiency, quiet operation, reduced brush-related wear, smooth electronic motor control, and extremely low levels of unwanted electrical and mechanical interference that can affect sonar.

Garmin rates the Force Kraken at 80 lb of maximum thrust on 24V and 100 lb on 36V using its high-efficiency propeller under ISO 13342.

Brushless technology is only one part of the Kraken system. Anchor Lock performance also depends on Garmin's multi-band GPS, AHRS, steering and motor-control systems, while sonar performance depends on the complete electrical and electronics installation.

Why Brushless Motor Technology Changes Everything

The Garmin Force® Kraken uses a brushless motor platform — a fundamental engineering departure from the brushed motors that have powered trolling motors for decades. Brushless motors eliminate brush-related wear, can improve electrical efficiency and quiet operation, and can substantially reduce one source of electrical interference compared with traditional brushed motors. For serious anglers, every one of those advantages translates directly into better fishing.

This guide explains how brushless motor technology works, why it outperforms traditional brushed motors, and what the real-world differences actually feel like on the water.

How Traditional Brushed Motors Work

A traditional brushed DC motor uses physical carbon brushes that press against a rotating commutator ring to deliver electrical current to the motor windings. As the motor spins, the brushes slide across the commutator, switching the direction of current flow to keep the motor turning.

This design works — and has worked for over a century — but it has inherent limitations:

  • Friction — the brushes physically contact the commutator, creating friction, heat, and wear with every revolution
  • Electrical arcing — as the brushes switch contact points, they generate electrical arcing that produces electromagnetic interference (EMI)
  • Wear and maintenance — brushes wear down over time and eventually need replacement
  • Efficiency loss — friction and heat represent energy that isn't converted to thrust
  • Noise — both mechanical noise from brush contact and electrical noise from arcing

For trolling motors specifically, the electrical arcing from brushed motors creates interference that can degrade sonar performance — a problem that has affected anglers for as long as trolling motors and fish finders have coexisted on the same boat.

How Brushless Motors Work

A brushless motor eliminates the physical brushes and commutator entirely. Instead of mechanical contact switching, a brushless motor uses electronic controllers to precisely manage the current delivered to each motor winding. The rotor — the spinning part — contains permanent magnets. The stator — the stationary part — contains the windings. Electronic sensors track rotor position and the controller switches current to the correct windings at exactly the right moment to keep the motor spinning efficiently.

No brushes. No commutator. No physical contact between moving and stationary parts.

The result is a motor architecture that eliminates brush friction and brush-related electrical arcing while allowing precise electronic control of motor operation.

Brushless vs. Brushed — Side-by-Side Comparison

Feature Brushless Motor Traditional Brushed Motor
Mechanical brushes None Yes
Brush/commutator wear Eliminated Present
Electrical arcing from brushes Eliminated Present
Motor efficiency Generally higher Generally lower
Motor noise Potentially lower Brush/commutator contact adds noise
Electrical interference Can be substantially reduced Brush arcing can contribute EMI
Speed control Electronic commutation Mechanical commutation
Maintenance No motor brushes to replace Brushes are wear components
GPS anchoring Depends on the complete motor/control/GPS system Depends on the complete motor/control/GPS system

Will You Actually Notice the Difference on the Water?

Yes — and in most cases, noticeably. Here's what brushless performance feels like in real fishing situations:

Anchor Lock in Wind and Current

When Anchor Lock commands thrust corrections to hold position in heavy wind or current, Kraken's electronically controlled brushless propulsion system can deliver smooth changes in motor output. But Anchor Lock performance is the result of the complete system — including Garmin's multi-band GPS, AHRS, steering, software, propeller, available thrust, and motor control — not brushless technology alone.

Fishing All Day on One Charge

The efficiency advantage of brushless technology is most pronounced at partial throttle — the speeds most anglers use most of the time. On a typical full-day trip, a brushless motor running at low and medium speeds can extend runtime substantially compared to a brushed motor drawing the same battery. Anglers who previously needed to manage battery carefully often find they finish the day with significantly more charge remaining.

Quiet Approach to Shallow Fish

Fish are sensitive to low-frequency vibration transmitted through the water. A brushless motor's quiet operation — no mechanical scraping, no electrical buzzing — lets you approach shallow structure, flats, and schools without spooking fish. Anglers who switch from brushed to brushless motors consistently report that the noise difference is noticeable.

Cleaner Sonar Returns

Garmin's brushless platform allows clear sonar returns with extremely low levels of unwanted electrical and mechanical interference. For anglers using Garmin Panoptix LiveScope — which is particularly sensitive to electrical interference — this is a meaningful advantage. Note that sonar performance also depends on the complete electrical installation: wiring routes, grounding, battery configuration, transducer wiring, and other onboard equipment.

Precise Boat Control Around Docks and Structure

The smooth variable-speed control of a brushless motor makes precise maneuvering around docks, bridge pilings, and tight structure significantly easier. Combined with the Force Kraken's full-power reverse thrust, you have a level of boat control that is difficult to achieve with brushed motors at low speeds.

The Five Core Advantages of Brushless Technology

1. Quiet Operation

Without brush-to-commutator contact, there's no mechanical scraping or clicking. Without electrical arcing, there's no high-frequency electrical noise. The Force Kraken runs substantially quieter than brushed trolling motors — both mechanically and electrically.

2. Cleaner Sonar Returns

Garmin specifically engineered the Force Kraken's brushless platform to minimize electrical noise, allowing clear sonar returns with extremely low levels of unwanted electrical and mechanical interference. Select Garmin Force Kraken configurations include a built-in GT56UHD transducer, while other configurations are supplied without a built-in transducer. Transducer inclusion varies by specific SKU, shaft length, and configuration — verify the exact model before purchasing.

3. Exceptional Efficiency — More Thrust Per Amp-Hour

Brushless motors convert a higher percentage of electrical energy into mechanical thrust. No friction losses from brush contact, and more precise electronic control of current delivery to each winding. The efficiency advantage is most pronounced at partial throttle — the speeds most anglers use most of the time.

4. Smooth Variable-Speed Control

Electronic commutation gives brushless motors exceptionally smooth speed control across the full throttle range. No dead spots, no surging, no cogging at low speeds. For Anchor Lock applications, this means smoother motor response as part of the complete positioning system.

5. Higher Reliability and Lower Maintenance

No brushes to wear, no commutator to clean, no brush replacement to schedule. The primary wear points — the bearings — are sealed and require no maintenance under normal use. In a saltwater environment where corrosion accelerates brush wear, the reliability advantage is especially significant.

Brushless Technology and the Garmin Ecosystem

The Force Kraken's brushless platform isn't just about motor performance in isolation — it's specifically engineered to work as part of Garmin's integrated fishing system. Every component communicates with every other:

  • Force Kraken brushless motor — quiet, minimal electrical interference, precise electronic speed control
  • Multi-band GPS + AHRS Anchor Lock — faster acquisition, greater accuracy, tighter position holding as part of the complete system
  • Garmin GPSMAP / ECHOMAP chartplotter — control Anchor Lock, follow routes, view motor status from the helm
  • Garmin Panoptix LiveScope — real-time forward-facing sonar that benefits from the motor's clean electrical environment
  • GT56UHD transducer — Traditional CHIRP, ClearVü, and SideVü; included on select configurations — verify by SKU
  • Pivot-style mount — saves bow space, makes long-shaft installation practical on large offshore boats
  • ActiveCaptain app — smartphone control for waypoints, charts, and motor management
  • Garmin smartwatch — activate Anchor Lock from your wrist

By minimizing unwanted electrical and mechanical interference from the propulsion motor, Garmin's brushless design is particularly valuable in boats running advanced sonar and integrated marine electronics. It's one reason brushless propulsion is such a strong fit for the electronics-focused Force Kraken platform.

Who Should Buy a Brushless Trolling Motor?

Brushless trolling motors are ideal for anglers who:

  • Fish every week and put serious hours on their equipment
  • Spend long days on the water and need maximum battery runtime
  • Fish offshore, in heavy current, or in conditions where precise boat control is critical
  • Use GPS anchoring frequently — Anchor Lock, Spot-Lock, or similar
  • Depend on advanced sonar — especially forward-facing sonar like Garmin Panoptix LiveScope
  • Fish saltwater, where corrosion accelerates wear on brushed motor components
  • Run guide or charter operations where equipment reliability is non-negotiable
  • Fish tournaments where precise boat control and reliable electronics are essential
  • Run lithium batteries and want to maximize the efficiency of their entire electrical system

If you fish occasionally on calm water with a basic fish finder, a brushed motor may serve you adequately. If you fish hard, fish often, or depend on integrated electronics, brushless technology is the right investment.

Common Myths About Brushless Trolling Motors

Myth: Brushless motors are only more powerful.

Reality: The biggest advantages of brushless technology are efficiency, smooth power delivery, lower maintenance, and quieter operation — not raw thrust. The Force Kraken delivers 100 lb of thrust at 36V and 80 lb at 24V. What's different is how efficiently and cleanly that thrust is delivered.

Myth: Brushless motors only matter in saltwater.

Reality: Freshwater anglers benefit equally from improved runtime, quieter operation, and more precise GPS boat control. Bass tournament anglers, walleye guides, and Great Lakes charter captains all benefit from brushless technology in freshwater applications.

Myth: The sonar interference difference is minor.

Reality: For anglers using forward-facing sonar like Garmin Panoptix LiveScope, the difference can be significant. LiveScope is particularly sensitive to electrical interference; a brushless motor produces substantially less interference than a brushed motor, which can result in cleaner, more accurate sonar returns. Overall sonar performance also depends on the complete electrical installation.

Myth: Brushless motors are harder to use.

Reality: The brushless platform is completely transparent to the user. You operate the Force Kraken exactly as you would any other trolling motor — foot pedal, wireless remote, chartplotter, or smartwatch. The brushless motor simply performs better behind the scenes.

Frequently Asked Questions

What is a brushless trolling motor?

A brushless trolling motor uses an electronically controlled motor that eliminates the physical carbon brushes and commutator found in traditional brushed motors. The result is a motor that is quieter, more efficient, more reliable, and produces less electrical interference.

Are brushless trolling motors worth the extra cost?

For serious anglers who fish frequently, depend on sonar, use GPS anchoring, or fish in saltwater, yes — the performance, reliability, and sonar advantages justify the premium. For occasional anglers on calm water with basic electronics, the cost difference may be harder to justify.

How long do brushless trolling motors last?

Brushless motors eliminate two traditional wear components — the carbon brushes and commutator — but overall trolling-motor service life depends on operating conditions, maintenance, corrosion exposure, seals, bearings, electronics, steering components, and other factors. Garmin backs the Force Kraken with a 3-year limited warranty and a limited lifetime warranty on the shaft.

Do brushless motors use less battery power?

Yes. Brushless motors convert a higher percentage of electrical energy into thrust, drawing fewer amps at equivalent thrust levels. The efficiency advantage is most pronounced at partial throttle — the speeds most anglers use most of the time — resulting in meaningfully longer runtime per charge.

Are brushless trolling motors quieter?

Yes — substantially. Without brush-to-commutator contact, there's no mechanical scraping. Without electrical arcing, there's no high-frequency electrical noise. Anglers who switch from brushed to brushless motors consistently report the difference is noticeable.

Do brushless motors reduce sonar interference?

Yes. Traditional brushed motors generate electromagnetic interference through electrical arcing that can appear as noise and clutter on sonar displays. Brushless motors produce substantially less interference, which can result in cleaner sonar returns — especially important for forward-facing sonar like Garmin Panoptix LiveScope. Overall sonar performance also depends on the complete electrical installation.

Is the Garmin Force Kraken brushless?

Yes. The Garmin Force Kraken uses a brushless motor platform across all shaft lengths (48", 63", 75", 90", and 110") and both finishes (black and white). The brushless platform is one of the Force Kraken's defining features.

What is the difference between the Garmin Force Kraken and a brushed trolling motor?

The Force Kraken's brushless platform delivers quieter operation, longer runtime, cleaner sonar returns, smoother motor control, lower maintenance, and better saltwater durability compared to traditional brushed trolling motors. It also integrates fully with Garmin chartplotters, LiveScope sonar, ActiveCaptain, and compatible Garmin smartwatches.

Explore the Complete Garmin Force Kraken Ecosystem

Authorized Garmin Dealer. Expert support before and after your purchase. Free nationwide shipping.

Back to blog