Minn Kota Ulterra QUEST 90/115 Trolling Motor — MEGA Down/Side Imaging — 72" Shaft

Auto Stow & Deploy. Power Trim. QUEST Brushless Power. Built-In MEGA Down/Side Imaging. Maximum Shaft Length for Large Freshwater Boats.

The Minn Kota Ulterra QUEST 90/115 with MEGA Down/Side Imaging and 72" shaft is the longest-shaft configuration in the Ulterra QUEST lineup — engineered for large freshwater boats with high bow profiles where shorter shafts can't maintain consistent propeller depth in rough water or strong current. If your boat has a high bow, you fish large open-water lakes, or you regularly deal with significant wave action, the 72" is the correct shaft.

Browse all shaft lengths: 45" — 60" — 72" (this product)  |  View the Full Ulterra QUEST Lineup →

Start Here: Is the 72" Shaft Right for Your Boat?

My Boat Is…	72" Shaft?
Over 24 ft with a high bow profile	✅ Yes — this is your shaft
18–24 ft with a moderate bow profile	Consider the 60" shaft
Under 18 ft or a smaller bass boat	Consider the 45" shaft
Prefer Dual Spectrum CHIRP over MEGA Imaging	See the Ulterra QUEST Dual Spectrum CHIRP — 72"

Why Choose Built-In MEGA Down/Side Imaging?

MEGA Down/Side Imaging delivers the highest-resolution sonar imaging available in a trolling motor — providing a near-photographic view of structure, timber, brush piles, and bottom composition to both sides and directly below the boat. It's the best choice for anglers who need to locate fish and structure quickly across a wide area, scan flats and shallow cover, or identify specific targets before making a cast.

Why Built-In MEGA Imaging Matters

• High-resolution Side Imaging — scan wide areas to both sides of the boat to locate fish, structure, and cover quickly
• MEGA Down Imaging — near-photographic detail of what's directly below the boat
• Identify specific targets — distinguish individual fish, brush piles, timber, and rock piles with precision
• Scan flats and shallow cover — ideal for bass fishing in shallow water where Side Imaging reveals hidden structure
• Protected transducer integrated into the lower unit — no exposed transducer to snag weeds or damage on launch
• Cleaner installation — motor and sonar share a single cable run to your Humminbird display

MEGA Imaging vs. Dual Spectrum CHIRP — Which Is Right for You?

If You Want…	Best Choice
Side Imaging of structure, timber, and flats	✅ MEGA Down/Side Imaging (this product)
Maximum imaging detail and wide-area scanning	✅ MEGA Down/Side Imaging (this product)
Scanning brush piles, standing timber, offshore structure	✅ MEGA Down/Side Imaging (this product)
Traditional sonar performance with superior depth detail	Dual Spectrum CHIRP — 72"
Lower overall system cost	Dual Spectrum CHIRP — 72"
Already own Live Sonar (MEGA Live, LiveScope)	Dual Spectrum CHIRP — 72"
Deep water vertical jigging and suspended fish	Dual Spectrum CHIRP — 72"

Note: MEGA Down/Side Imaging requires a compatible Humminbird fish finder to display sonar. Contact us if you need help confirming compatibility with your existing electronics.

Best For — Freshwater Fishing Applications

The Ulterra QUEST 90/115 with MEGA Down/Side Imaging and 72" shaft excels in:

• Large freshwater boats with high bow profiles — the 72" shaft keeps the propeller submerged in rough water where shorter shafts ventilate
• Great Lakes fishing — open-water wave action demands maximum shaft depth for consistent thrust and Spot-Lock performance; MEGA Side Imaging reveals structure and cover across wide areas
• Muskie and walleye fishing on large impoundments — maximum thrust (115 lb on 36V) for controlling large boats in wind and current; MEGA for locating fish on structure
• Structure fishing on large reservoirs — scan brush piles, timber, ledges, and offshore humps with MEGA Side Imaging
• Anglers who scan flats and shallow cover — MEGA Side Imaging is the best tool for locating fish in shallow structure

Why the Ulterra QUEST — Full Feature Set

• Auto Stow & Deploy — fully automatic with a single button press; no manual lifting required
• Power Trim — raise or lower motor depth electronically without leaving your seat
• QUEST Brushless Motor — more torque, better efficiency, quieter operation, less maintenance than brushed alternatives
• Dual-Voltage Operation — 90 lbs on 24V, 115 lbs on 36V from a single motor
• Spot-Lock with Jog — GPS anchoring that holds position within feet; adjust in precise 5-foot increments
• Drift Mode — controlled drift speed and direction compensation for walleye and multi-species presentations
• Advanced GPS AutoPilot — heading lock and course correction
• One-Boat Network — full integration with compatible Humminbird fish finders
• Digital Maximizer — up to 5x longer battery runtime
• Wireless Remote — full motor control from anywhere on the boat
• Programmable Heel-Toe Electric Foot Pedal — included; hands-free steering and speed control

Voltage & Battery Recommendations

Voltage	Thrust	Best For
24V	90 lb	Lighter boats in moderate conditions; two 12V batteries
36V	115 lb	Large boats, rough water, demanding conditions; three 12V batteries — strongly recommended for this shaft length

We recommend pairing with lithium batteries for lighter weight, longer runtime, and faster charging. AGM is also compatible. Contact us for a complete battery system recommendation for your boat.

Complete Your Setup

TrollingMotors.shop is a complete-system provider — not just a motor retailer. Here's what we recommend pairing with the Ulterra QUEST 90/115 MEGA Down/Side Imaging for a fully integrated freshwater setup:

Humminbird Displays (One-Boat Network Compatible)

• Humminbird HELIX series — entry to mid-level; excellent MEGA imaging performance at a lower price point
• Humminbird XPLORE series — mid-range with full One-Boat Network integration and MEGA imaging capability
• Humminbird APEX series — premium performance with full networking, MEGA Live, and multi-display capability
• Humminbird SOLIX series — flagship; maximum display size, processing power, and networking for serious tournament anglers

Battery Systems

• Abyss Lithium Batteries — 100Ah lithium (x2 for 24V, x3 for 36V) for maximum runtime and minimum weight
• AGM Deep Cycle Batteries — reliable and cost-effective alternative

Charging & Electrical

• Minn Kota Precision Charger — onboard charging optimized for your battery chemistry and voltage configuration
• 60A Circuit Breaker — required for proper motor protection

Mounting & Accessories

• Quick-Release Bracket — Minn Kota RTA-62 for fast motor removal and installation

Contact us before you order and we'll build the right complete system for your boat, budget, and fishing style.

Specifications

Specification	Details
Thrust	90 lb (24V) / 115 lb (36V)
Voltage	24V / 36V selectable
Shaft Length	72"
Motor Technology	QUEST Brushless
Deploy System	Auto Stow & Deploy
Depth Adjustment	Power Trim
GPS Anchoring	Spot-Lock with Jog
Sonar	MEGA Down/Side Imaging (integrated)
Network	One-Boat Network (Humminbird compatible)
Control	Wireless Remote + Heel-Toe Foot Pedal (both included)
Mount	Bow Mount — Electric Steer
Water Type	Freshwater
Shaft Material	Indestructible Composite (lifetime warranty)
Motor Warranty	3-Year Limited

What's Included

• Minn Kota Ulterra QUEST 90/115 Trolling Motor
• Wireless Remote
• Programmable Heel-Toe Electric Foot Pedal
• Integrated MEGA Down/Side Imaging Transducer
• Heading Sensor
• Weedless Wedge Propeller
• Mounting Hardware
• Owner's Manual

Learning Center

• Minn Kota Ulterra QUEST — Full Lineup & Buying Guide
• Spot-Lock with Jog — How It Works
• Drift Mode — How It Works
• Follow Mode — How It Works
• QUEST Brushless Technology — What It Means and Why It Matters
• One-Boat Network — What It Is and How to Use It
• Real-Time Battery Monitoring — How It Works
• Trolling Motor Shaft Length Guide

Frequently Asked Questions

What is the difference between MEGA Down/Side Imaging and Dual Spectrum CHIRP?

MEGA Down/Side Imaging provides high-resolution, wide-area scanning to both sides of the boat — ideal for locating fish and structure quickly across a large area, scanning flats, timber, and brush piles. Dual Spectrum CHIRP delivers superior 2D sonar target separation at depth, making it better for deep water vertical fishing and anglers who already run Live Sonar. If you scan structure and cover, choose MEGA. If you fish deep water vertically or already run Live Sonar, see the Dual Spectrum CHIRP — 72" version.

Does this model include a foot pedal?

Yes. The Ulterra QUEST includes both a programmable heel-toe electric foot pedal and a wireless remote, giving you multiple control options from anywhere on the boat.

Can this motor run on both 24V and 36V?

Yes. The Ulterra QUEST 90/115 is a dual-voltage platform — 90 lbs on 24V, 115 lbs on 36V. For large boats at this shaft length, we strongly recommend 36V for maximum thrust and runtime.

What size boat is the 72" shaft best suited for?

The 72" shaft is designed for large freshwater boats over 24 ft with high bow profiles, or for anglers who regularly fish in open-water conditions with significant wave action — such as the Great Lakes. For most 18–24 ft boats, the 60" shaft is the better choice.

Is this motor saltwater-rated?

No. The Ulterra QUEST is a freshwater motor. For saltwater use, see the Minn Kota Riptide Instinct QUEST lineup.

What quick-release bracket fits this motor?

The Minn Kota RTA-62 Quick Release Bracket is compatible with the Ulterra QUEST.

Why Buy From TrollingMotors.shop?

✅ Authorized Minn Kota Dealer — Full factory warranty on every motor we sell.
✅ Expert Product Recommendations — We help you choose the right motor, shaft length, battery system, and Humminbird display for your specific boat and fishing style.
✅ Free Shipping on Qualifying Orders — Fast, nationwide delivery on most trolling motors.
✅ Complete System Recommendations — We don't just sell motors. We help you build the right setup.
✅ Trolling Motor Specialists — This is all we do. We know these products inside and out.