Humminbird HELIX 8® CHIRP MEGA SI+ GPS G4N

Humminbird HELIX 8® CHIRP MEGA SI+ GPS G4N Product Description

Unlock Crystal-Clear Views Beneath the Surface with MEGA Imaging+

Imagine gliding across the water, watching structure and fish emerge in stunning detail right on your screen. The MEGA Side Imaging+ sweeps up to 200 feet on each side of your boat, revealing submerged trees, rock piles, and schools of fish with 20% sharper detail than standard MEGA Imaging. Pair it with MEGA Down Imaging+, which peers straight down to 200 feet, painting a vivid picture of what's directly below. Anglers swear by this combo for spotting bass huddled around drop-offs or walleye cruising the flats—details that once stayed hidden now guide your next cast.

Backed by Dual Spectrum CHIRP sonar, this unit switches seamlessly between wide coverage for scouting vast areas and narrow beams for pinpointing targets. The result? Fish arches that pop and bottom profiles that tell the full story of the underwater world, helping you adapt to changing conditions on the fly.

Intuitive 8-Inch Display and Keypad Mastery

At the heart of this fish finder sits an 8-inch high-resolution LCD (1024 x 600 pixels) that's sunlight-readable and built to handle the harshest marine environments—fully waterproof and rugged for years of reliable service. The keypad control feels natural, even with gloves on or in rough waves. Soft keys and a user-friendly menu let you flip between sonar views, charts, and settings without missing a beat, making it ideal for solo anglers or tournament pros who need quick access during high-stakes moments.

Navigate and Map with Precision GPS Confidence

Built-in GPS delivers spot-on positioning for marking hotspots with up to 2,750 waypoints. The Humminbird Basemap covers over 10,000 freshwater lakes and coastal U.S. waters, highlighting contours, hazards, marinas, and depth markers so you never second-guess your path. Dive deeper with AutoChart Live, which lets you generate custom maps in real-time—contours, hardness, and vegetation—as you motor along. Store eight hours onboard or expand with a microSD card for endless mapping adventures.

For seasoned anglers, compatibility with premium charts opens up LakeMaster's shaded contours and SmartStrike's fish-patterning tech, turning data into dialed-in strategies for any season.

Seamless Connectivity for a Smarter Fishing Setup

Go beyond standalone with Wi-Fi, Bluetooth, Ethernet, and NMEA 2000 integration. Sync with the One-Boat Network to control Minn Kota trolling motors or Cannon downriggers from the screen. Bluetooth handles wireless updates via the FishSmart app and even mirrors phone notifications. Ethernet builds pro-level systems—daisy-chain units or add radar for all-weather awareness. It's like having a command center that ties your entire rig together, saving time and boosting catches.

Pro Tips to Maximize Your Helix 8 on the Water

For bass tournaments, crank up MEGA Side Imaging+ at troll speeds around 1-2 mph to scan points efficiently. Ice anglers love the CHIRP's sensitivity for jigging over deep structure. Offshore? Layer NMEA data for current and wind insights. Always calibrate your transducer for your hull—quick tweaks in the menu can sharpen images dramatically. Pair with a quality battery setup to keep MEGA Live running strong all day, capturing those fleeting fish movements in real-time.

Whether chasing crappie in shallows or stripers in the bluewater, this unit's versatility shines, helping newcomers build skills and veterans refine their edge.

Ready-to-Install Kit for Effortless Setup

Everything you need arrives in the box: control head, transom-mount transducer with bracket, power cable, and gimbal mount. Most installs take under an hour, with intuitive wiring that plays nice with existing boat electronics. Backed by a solid two-year warranty, it's built to last through seasons of hard use.

Frequently Asked Questions

What makes MEGA Imaging+ better than standard side imaging?

MEGA Imaging+ delivers 20% more detail and extends range to 200 feet per side (or down), thanks to higher frequencies and advanced processing for sharper, real-time views of fish and cover.

Does this model support custom mapping?

Yes, AutoChart Live creates personalized maps of depth, bottom hardness, and vegetation on the fly, with eight hours of storage expandable via microSD.

Can I connect it to other boating electronics?

Absolutely—Ethernet, Bluetooth, Wi-Fi, and NMEA 2000 enable networking with trolling motors, anchors, downriggers, and more for a unified system.

Is the display suitable for bright sunlight?

The 8-inch 1024x600 LCD is optimized for high visibility in direct sun, with adjustable brightness to cut glare on the water.

What types of boats work best with this fish finder?

It's perfect for bass boats, walleye rigs, bay vessels, and multi-species setups—compact dimensions fit consoles from 16-foot tillers to 30-foot centers.

How does Dual Spectrum CHIRP help find fish?

It offers Wide Mode for broad searches and Narrow Mode for fine details, producing crisp fish arches and structure returns across frequencies.

What's included for mounting the transducer?

A transom-mount transducer with bracket and hardware ensures straightforward installation on most hulls.

The HELIX 8 CHIRP MSI+ GPS G4N features an 8 Inch display, MEGA Side Imaging+, MEGA Down Imaging+, Dual Spectrum CHIRP Sonar and internal GPS with Humminbird Basemap. As with all HELIX G4N models, this HELIX 8 standard features such as AutoChart Live, Wi-Fi and NMEA 2000 (R), in addition to Bluetooth (R) and Ethernet networking for compatibility with the One-Boat Network ™ family of products from Humminbird, Minn Kota and Cannon.

Humminbird 4113501 Attributes

• Display Size: 8 Inch LCD
• Display Resolution: 1024 X 600 Pixels
• Overall Dimensions: 12 Inch Length X 7 Inch Height X 4.13 Inch Depth
• Sonar Compatibility: Dual Spectrum CHIRP Sonar
• With Built-In GPS: Yes
• Used To: Use To Find Fish And Identify Buoys/ Day Markers/ Hazards/ Marinas/ Contours/ Depth Markers
• Interface: Keypad
• Waterproof: Yes
• Point Of Interest: 2750 Waypoints
• SD Card Storage: Micro SD Card

Humminbird 4113501 Features & Benefits

• MEGA Live Delivers The Clarity And Detail Of MEGA Imaging In Live-Action, Allowing Anglers To See Fish And Structure In Real-Time
• MEGA Side And Down Imaging+ Extends Out To 200 Feet On Either Side, Plus 20 Percent More Detail Than MEGA Side And Down Imaging
• CHIRP Stands For “Compressed High Intensity Radar Pulse”: By Covering A Wide Range Of Frequencies, CHIRP Produces More Accurate, More Detailed Returns Of Fish, Structure And The Bottom
• Dual Spectrum CHIRP Sonar: By Covering A Wide Range Of Frequencies, CHIRP Produces More Accurate, More Detailed Returns Of Fish, Structure And The Bottom
• Precision GPS Provides An Accurate Position Fix, Meaning More Accurate Waypoints And Boat Positioning For Better Fishing
• Humminbird Basemap: Based On Freshwater Data From LakeMaster And NOAA, These Maps Provide A Clear View Of Underwater Terrain
• Map The Water As You Drive The Boat And Keep The Data Stored On Your Fish Finder Or Import It Into The AutoChart PC Program
• LakeMaster Lake Maps Features Unrivaled, Easy-To-Read Contours, Highlighted Depth Ranges, Scrollable Lake Lists And More
• SmartStrike Cards Combine High Definition LakeMaster Lake Map Data And Extensive Search Algorithms To Help You Pattern And Locate Fish At Any Time Of The Year
• Limited 2 Year Warranty

Humminbird 4113501 Installation Instructions

• HUM_productmanual_HELIX_OPSTART_532403E.pdf
• HUM_productmanual_IG_HLX_9-10-12_532405.pdf
• HUM_productmanual_IG_XM_Fixed_532508.pdf
• HUM_productmanual_OPS_HELIX_SRS_532509E.pdf

Humminbird 4113501 Warranties

• Humminbird 2-Year Limited Warranty.pdf

Humminbird 4113501 Technical Bulletins

• HUM_productmanual_Transducer_RG_532651E.pdf

HELIX 8® CHIRP MEGA SI+ GPS G4N

The HELIX 8 CHIRP MSI+ GPS G4N features an 8" display, MEGA Side Imaging+, MEGA Down Imaging+, Dual Spectrum CHIRP Sonar and internal GPS with Humminbird Basemap. As with all HELIX G4N models, this HELIX 8 includes standard features such as AutoChart Live, Wi-Fi and NMEA 2000®, in addition to Bluetooth® and Ethernet networking for compatibility with the One-Boat Network™ family of products from Humminbird, Minn Kota and Cannon. 

Features:

• Keypad control: Master HELIX at the touch of a button. Access the preloaded views from the user-friendly menu system, operated by soft key controls that allow you to reliably operate your fish finder in any condition.
• MEGA Side Imaging+: See the world below like never before with a crystal-clear Side Imaging viewing out to 200 feet on either side of your boat. You'll unlock more fish and structure with 20% more detail and 60% more range capability than MEGA Side Imaging sonar.
• MEGA Down Imaging+: Get unprecedented underwater clarity with Down Imaging coverage down to 200 feet below your boat. You'll unlock more fish and structure with 20% more detail and 60% more depth capability than MEGA Down Imaging sonar.
• Dual Spectrum CHIRP sonar: Before you cast, know what's down there thanks to highly-detailed fish arches and a clear view of fish-holding structure and the bottom. Powered by our proprietary, Low-Q CHIRP transducer, Dual Spectrum offers two ways to search; Wide Mode for maximum coverage and Narrow Mode for focusing on the slightest detail.
• Internal GPS and Humminbird Basemap: Our enhanced basemap provides you with a clear view of underwater terrain and surrounding points of interest so you can fish and navigate with total confidence. Identify buoys, day markers, hazards, marinas, contours, depth markers and much, much more. Includes charts of more than 10,000 lakes, plus coastal coverage for the continental U.S.
• Premium Chart Compatible: Humminbird provides the most complete offering of premium chart options to anglers everywhere. Get a complete view of the world below with optional charts from Humminbird's LakeMaster® and CoastMaster™ products, as well as your choice of compatible Navionics® charts. 
• AutoChart Live: Create real-time maps of your fishing spots, with access to patented Humminbird® LakeMaster® features. Map depth contours, bottom hardness and vegetation as you drive your boat.  Comes standard with eight (8) hours of built-in recording time and is compatible with AutoChart Zero Line SD cards for virtually-endless AutoChart Live mapping capacity.
• One-Boat Network Compatible: Many Humminbird models seamlessly integrate and communicate with Minn Kota and Cannon products to unlock more features and capabilities for anglers everywhere. Make the more of your time on the water with the exclusive boat control and fish-catching features of the One-Boat Network. 
• Ethernet Networking: High-speed Ethernet allows you to build a powerful, professional-grade fishing system. Easily connect multiple fish finders, or upgrade to add-on technologies like Minn Kota i-Pilot Link and Humminbird CHIRP Radar.
• Bluetooth: Take control right from the screen of your Humminbird with wireless communication to compatible Talon and Raptor shallow water anchors, as well as Cannon Optimum downriggers. Additional features include wireless software updates from the Humminbird FishSmart App and display of smart phone notifications on your Humminbird. 
• NMEA 2000 networking built-in: Connect an accessory NMEA 2000 network to your control head for even more information; from boat performance to weather and water conditions, make sense of it all with NMEA 2000 networking.
• Includes control head, transom mount transducer and mounting hardware, power cable, gimbal mounting bracket.
• 2-Year Limited Warranty

HELIX CHIRP MSI + GPS G4N comes with an inch display, MEGA Side Imaging +, MEGA Down Imaging +, bispectral CHIRP sonar and built-in GPS with Humminbird basic map. Like all HELIX G4N models, this HELIX includes Bluetooth and Ethernet networks compatible with Humminbird, Minn Kota and Cannon's One-Boat Network series products, as well as standard features such as AutoChart Live, Wi-Fi and NMEA 2000. The loading view in the humanized menu system is operated by soft key control, so that you can operate the fish finder reliably under any circumstances. MEGA side imaging + MEGA downward imaging + MEGA downward imaging + dual-spectrum CHIRP sonar internal GPS and Humminbird base map compatible with advanced sea charts

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