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 >  > Fish Hawk X4 Upgrade Kit
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Fish Hawk X4 Upgrade Kit

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Item #: F87287031
$499.95

Fish Hawk X4 Upgrade Kit

The Fish Hawk X4 Upgrade Kit will upgrade your old Fish Hawk 840 Thermo Troll to a new X4 System. This kit includes the X4 Display and X4 Probe. The Fish Hawk X4 offers double the performance and uses the same transducer and power cord as the 840 – meaning you don’t need to re-wire anything on the boat, the X4 plugs right in! This is the least expensive way to buy the X4 Probe and LCD Display.

The Fish Hawk X4 Upgrade Kit will make your 840 system invaluable by providing fine-tuning for your trolling program, revealing optimal speeds for each lure, discovering thermal breaks, and ultimately, boating more fish.

The complete Fish Hawk X4 Upgrade Kit includes:
  • Includes X4 LCD and Probe
  • Plugs in to 840 transducer and powercord
  • Two-times more powerful with less intereference
  • Sealed electronics case totally eliminates leaks
  • Deep water transmission, 200' + guaranteed
  • 40% smaller probe for less kickback
  • 100+ hour battery life
  • Thin profile, small footprint display
  • Magnum Digit Display with Nightglow
  • Includes breakaway cannon ball safety cable
  • Wireless, works with any downrigger and does not need coated cable!
  • Probe dimensions 6 1/2" long x 2 1/4" diameter
  • 70 KHz transmission frequency
  • Probe operates on 4 AA alkaline batteries (not included)
  • Display operates on 12VDC
  • Displays temp in F or C, displays speed in MPH, KNOTS, or KPH
  • Made in the USA
LCD Monitor specifications include:
  • Flat screen LCD with Magnum sized digits that can be seen from the back of the boat
  • Display dimensions 6 3/4" tall x 4 1/4" wide (allow for 8" of vertical clearance)
  • Cool blue backlit screen doesn’t cause night-blindness
  • Small footprint for easy mounting
  • High lux nightglow lighting
  • Intuitive Surface/Downrigger split display


For details on the Replacement Triducer for the X4 or 840 Trolling System,
please see the ">Fish Hawk X4 Triducer Replacement page.

To order, please select "Add to Basket" above.


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