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Customer Service

MarCum FAQs

What are the run times of the various Marcum products?

There are a few factors that can cause run time to vary [battery size {7amp vs. 9 amp}, how good a charge is on it when you start, temperature, where you have you settings at, etc.], but this is a good guideline.

Mechanical flashers [VX-1p, LX-3TC, LX-5]—15 hours

Showdown 5.6 & Showdown 5.6 Dual Beam—30 hours. Troller with AA batteries –8 hours; with 12 volt battery—30 hours

  • LX-6—10 hours
  • LX-7—8 hours
  • LX-9—8 hours
  • Underwater Viewing Systems [VS385, 385C, 625sd, 825sd]—8 hours

I need a part that I don’t see on your website, how do I get what I need?

Many spare parts, like ducer arms, stoppers, etc. can be easily obtained by contacting the MarCum Tech Customer Support Office. The number there is 888-778-1208. Be advised that in the heart of ice season it can be tough to get through; sending an email to may be the best way to make contact with someone there. If your MarCum is in need of repair, this is also where you can get Return Authorization and shipping instructions.

My warranty card is asking for the serial number of my MarCum, where do I find it? It is located on the back of the display, near where the plugs attach. It may be necessary to remove your MarCum from the pack to view the serial number.

How do I update my firmware? [LX-6, LX-7, LX-9]

MarCum has released a new firmware updates for the LX-6, LX-7 and LX-9 units. Below are some of the highlights featured in this update. Click the link for your unit below and follow the update procedure on to update your unit.

LX- 6 & LX-7 version 4.07

  • Manual Dynamic Range – Adjustable in one-foot increments
  • Transducer offset added in one-inch increments
  • Default to 6 color mode
LX-6 Firmware Update - Visit

LX-7 Firmware Update - Visit

LX-9 version 2.31

  • Manual Dynamic Range – Adjustable in one-foot increments
  • Default to 6 color mode
  • Brightness, Contrast, Color Kill added to Camera settings
  • Quick key combo added (Down button) for one touch record
  • Pre-record option with 1,3,5,10,15 minute selectable settings
  • Fast forward & rewind in playback
  • Thumbnail images added in playback screen
LX-9 Firmware Update - Visit

Why don’t I see “arches” on my display when ice fishing? [LX6, LX-7, LX-9]

A graph like the LX-7 displays fish as "arches" because imagine you are in a boat moving along steadily in 20 feet of water, and you are coming up on a fish that is 5 feet off the bottom, or 15 feet below the boat. Your ducer will first sense the fish before it is directly above the fish, and will begin to mark the fish at around 18 feet because the fish is actually 18 feet away from the ducer [think about the cone angle]. As the boat gets directly over the fish, the fish is now 15 feet from the ducer, and the arch will start to take shape as the signal rises and becomes thicker. As the boat passes the fish, the fish is now farther away and the mark will become thinner and drop back off to 18 feet of water, completing the arch shape.

There are many factors that can affect how signals are shown. As you know, when ice fishing with the graph targets show as lines of varying thickness depending on signal strength. If your boat is stationary, drifting or trolling slowly, or at least not passing directly over a fish, it is unpredictable how the marks will show.

Can I get a longer cable for my camera?

We are occasionally asked why we don’t have longer cables on our systems. We actually get some folks asking for a shortened cable too. We do not offer custom cable lengths.

The main reasons for the cable being the length it is:

  • Most of our customers use them in 30’ or less because
  • Most lakes don’t have much to see at those depths beyond 40’
  • Image quality starts to go down as the cables get longer.
  • It is difficult to store and manage long lengths of camera cable

How far can I see with my underwater camera?

We are constantly amazed at the breathtaking looks we get at the underwater world when conditions are favorable. At the same time, we not surprised when we try to have a look below the surface of a murky lake or river, and are shown very little, if anything, on the monitor. To avoid disappointment, it is important that the angler has realistic expectations as to what kind of image will be visible on the monitor.

You can expect the distance you can see with your camera underwater (depth of field) to be similar to how far down in the water you can see the camera itself. If you watch as you drop the camera over the side of your boat and it disappears at about two feet, you should not expect to be able to see underwater targets that are more than two feet from the front of the camera. Also, remember that as the water depth increases, visibility goes down.

Also, different people define “clear water” differently. Our offices are located in Minnesota, where we have quite a range of water clarities. Some lakes around here are super clear, allowing a depth of field of twenty feet or more. You can then travel down the road and find a lake with very dark water, where a depth of field over a foot or two is not possible. There are areas in the country where finding any water clearer than two feet is difficult, in those areas a lake with four feet of vis is considered to be “gin-clear”, where in our part of the country, that kind of clarity would get rated at “stained.”

Even in murky water, with visibility less than a foot, the camera can still be used to identify bottom types, submerged structure, weeds, and to check for the presence of fish.

How do I make recordings with my underwater camera?

On the back of your monitor there is a yellow “video out” RCA jack. Until the last couple of years it was easy to find a recording device that accepts “video in” through an RCA jack. Unfortunately, finding such a recorder has become difficult as of late. One option used by some is to bring a laptop computer out with you and record through a USB port with the help of an A/V-to-USB 2.0 Digital Video Adapter (available in most electronics stores).