Humminbird XTM-9-HW-MSI-150-T MEGA SI/DI Dual Spectrum CHIRP Trolling Motor Transducer w/Temp f/HELIX® 7/8 MEGA® SI

Imagine gliding silently across the water, your trolling motor humming softly, while razor-sharp images of the lake bottom, submerged trees, and schools of fish unfold on your HELIX display in real time. That's the power of the XTM-9-HW-MSI-150-T transducer—designed specifically for anglers who demand the best from their sonar setup. Mounted directly on your trolling motor, this unit delivers MEGA Side Imaging and Down Imaging alongside Dual Spectrum CHIRP sonar, giving you an unbeatable edge whether you're chasing walleye in deep water or bass hiding in shallow cover.

What sets this transducer apart isn't just the specs—it's how it transforms your fishing trips. The built-in temperature sensor lets you track water conditions on the fly, helping you pinpoint thermoclines where fish stack up. With a rugged composite build and impact-release bracket, it shrugs off accidental bumps from logs or rocks, keeping you focused on the hunt rather than repairs.

Mastering Multiple Sonar Modes for Every Fishing Scenario

This transducer packs a punch with versatile imaging options tailored to different depths and conditions. Dual Spectrum CHIRP 2D sonar sweeps the water column with precision, revealing baitfish schools and bottom structure even in murky water. Switch to MEGA Side Imaging for wide swaths up to 250 feet side-to-side at high resolution, or MEGA Down Imaging for detailed vertical slices up to 75 feet down—perfect for navigating drop-offs or spotting crappie suspended over brush piles.

• Dual Spectrum CHIRP: Full range 150-220 kHz (max depth 1200 feet), with narrow (180-240 kHz) for pinpoint accuracy and wide (140-200 kHz) for broad coverage.
• MEGA Side Imaging: 455 kHz (440-500 kHz band) reaches 480 feet side-to-side; MEGA SI (1075-1150 kHz) excels at closer ranges up to 250 feet with stunning detail.
• MEGA Down Imaging: 455 kHz to 125 feet; MEGA DI to 75 feet, capturing fish-holding ledges and weed edges like never before.

Anglers report cleaner separations between fish and rocks compared to standard 83/200 kHz setups, making hooksets more confident during those critical moments.

Perfect Fit for HELIX 7 and 8 MEGA SI Models

Engineered for seamless integration, this 7-pin transducer plugs right into your HELIX 7 CHIRP MEGA SI GPS G3, G3N, or compatible HELIX 8 units. No adapters needed—just mount, connect the 20-foot cable, and start scanning. Its trolling motor design keeps the transducer submerged and stable at various speeds, unlike transom mounts that drag or lose bottom lock while on plane.

Pro tip: Pair it with AutoChart Live for real-time mapping as you explore new waters, turning uncharted spots into your secret honey holes.

Rugged Design Built for Real-World Boating

Crafted from durable composite materials, this transducer withstands the rigors of freshwater and light saltwater use. The impact-release mounting bracket pops free if snagged, protecting both your gear and your peace of mind. Over two decades of Humminbird innovation ensure it performs reliably season after season, backed by a solid warranty for worry-free ownership.

Stress-Free Installation on Your Trolling Motor

Setup is straightforward for most setups. Secure the stainless steel clamp ring to your motor's shaft (fits common models like Minn Kota or MotorGuide), route the cable along the shaft avoiding pinch points, and connect to your unit's rear port. Test at low speeds first to fine-tune the angle—aim for a slight downward tilt to optimize bottom coverage. Many users complete the job in under 30 minutes with basic tools, and the long cable gives flexibility for clean routing back to the console.

For best results, keep the face clean of algae buildup and store it dry during off-season to maintain peak performance.

Why This Transducer Elevates Your Fishing Game

Beyond the numbers, it's about results on the water. Spot weedlines from afar with Side Imaging, then zoom in with Down Imaging to see individual walleye hugging the bottom. The CHIRP-enhanced 2D sonar cuts through clutter, showing subtle humps and points that flat-screen sonars miss. Serious tournament anglers swear by it for graphing contests, while weekend warriors love how it reveals structure in familiar lakes they've fished for years.

Frequently Asked Questions