What a downrigger does and why you need one

A downrigger is a mechanical arm mounted to your boat that lowers a weighted cable or line to a specific depth, then releases your fishing line when a fish bites. Instead of casting and hoping your lure sinks to where the fish are, you use the downrigger to place your bait or lure at the exact depth you want — and keep it there while you troll. The weight stays on the downrigger cable; your actual fishing line stays relatively light and free, so you feel the bite clearly and fight the fish on tackle that's built for fighting, not dragging weight.

Downriggers matter because many fish — lake trout, salmon, walleye, and others — hold at depths where casting gear simply won't reach. A downrigger lets you fish 40, 60, or 100 feet down without the exhaustion and line twist that come from trolling with heavy sinkers. You also cover water faster and more efficiently, because you're not guessing at depth or adjusting constantly.

Key Takeaways

  • A downrigger holds your line at a set depth using a weighted cable, then releases it when a fish strikes, so you fight the fish on your actual rod rather than dragging weight.
  • The release mechanism — either a clip that holds your line or a rod holder that triggers — must be set with enough tension to hold your lure but loose enough to trip when a fish bites.
  • Depth is controlled by the cable counter on the downrigger; you lower the weight until the counter shows the depth you want, then set your fishing line in the release.
  • Trolling speed matters: most downrigger fishing happens between 1.5 and 3 miles per hour, and speed affects how your lure behaves and how deep the weight actually sits.
  • Maintenance is simple — rinse the cable and gears with fresh water after each trip, check the cable for fraying, and keep the release mechanism clean so it trips reliably.

The basic parts and how they work together

A downrigger has four working parts: the motor (electric or manual crank), the cable (usually stainless steel, 150 to 300 pounds breaking strength), the weight (typically 8 to 15 pounds), and the release mechanism. The motor winds and unwinds the cable. The cable carries the weight down. The weight does the actual pulling. The release holds your fishing line until a fish tugs hard enough to trigger it.

The release is the part that makes downriggers work. Most releases are either line-clip releases — which pinch your fishing line and let go when tension increases — or rod-holder releases — which hold your rod in a holder and trip when the rod bends. Line-clip releases are simpler and more common for trolling; rod-holder releases give you more control and are often used when you're stationary or fishing vertically. Both types have an adjustment screw that sets how much tension is needed to trigger the release. Set it too tight and the fish won't trip it; set it too loose and it releases on its own.

The cable counter on the downrigger shows how much cable is out. It's not perfectly accurate — cable stretches slightly, and the weight doesn't sit perfectly vertical — but it's close enough to return to the same depth on your next pass. Most counters read in feet or meters and reset to zero when the weight is fully wound in.

Setting up your downrigger and release for the first time

Mount the downrigger to the gunwale or transom of your boat using the brackets that come with it. Most downriggers clamp on; some bolt through. Make sure it's tight and won't shift when you're fighting a fish. If you have two downriggers, mount them on opposite sides of the boat so the cables don't tangle.

Attach your fishing rod to a rod holder or position it so the line can reach the release. If you're using a line-clip release, clip your fishing line into the release — not your main line, but the line between your rod and your lure. The clip should hold the line firmly but not so hard that it frays the line. If you're using a rod-holder release, place your rod in the holder with the reel in free spool or with the drag set to trip the release.

Lower the weight to the bottom or to a known depth, then adjust the release tension. Start with the adjustment screw loose, then tighten it gradually while pulling up on your fishing line. You want enough resistance that the release doesn't slip on its own, but not so much that you have to yank hard to trip it. A good test: pull up on the line with steady, moderate pressure — the release should hold, but a sharp tug should trip it. Once you've set the tension, you usually don't need to adjust it again unless you change lure weight or line type.

Lowering the weight and finding the right depth

Start the downrigger motor and lower the weight slowly. Watch the cable counter as it unwinds. Most downriggers have a speed control so you can lower at a steady pace — usually 1 to 2 feet per second. Lowering too fast can tangle the cable or cause the weight to swing.

Stop when the counter shows the depth you want to fish. If you're fishing a lake and you know fish are holding at 50 feet, lower to 45 or 50 feet. If you're exploring, start at a depth where you've caught fish before, or ask other anglers what depth is producing. Once the weight is at depth, engage the motor lock so the cable stays put.

The weight won't sit perfectly straight down — it will trail behind the boat at an angle, especially at faster trolling speeds. This means the actual depth of your lure is shallower than the cable counter shows. At 2 miles per hour, the difference is small; at 3 miles per hour, you might be 5 to 10 feet shallower than the counter indicates. If you're not getting bites, try lowering another 10 feet to account for this angle.

Trolling and watching for strikes

Once the weight is at depth, begin trolling at a steady speed — usually 1.5 to 3 miles per hour, depending on the fish species and lure type. Slower speeds work better for deep, cold water and for live bait; faster speeds work for crankbaits and in warmer water. Keep the boat in a straight line and avoid sudden turns that could tangle the cable or jerk the release.

Watch your rod tip. When a fish bites, the rod will bend and the release will trip, freeing your line from the downrigger. You'll feel the fish directly on your rod. Set the hook with a sharp upward strike, just as you would with any other fishing method. Once the release trips, reel steadily and fight the fish normally — the downrigger is out of the picture now.

If you're fishing two downriggers at different depths, watch both rods. Some anglers stagger the depths — one at 40 feet, one at 60 feet — to find where the fish are holding. Others fish the same depth on both sides to cover more water. Experiment and adjust based on what's working.

Retrieving the weight and resetting

After you've caught a fish or completed a pass, wind the weight back up. Engage the motor and raise the cable at a steady speed — usually the same speed you lowered it. Watch the counter as it winds back to zero. Once the weight is fully in, the cable should be tight and the weight should be resting against the boom.

Before you lower again, check that your fishing line is still clipped into the release and that the release tension is still set correctly. If you've caught a fish, re-clip your line and make sure the clip is tight. If you're changing lures, clip the new lure into the release at the same position as before — this keeps the release tension consistent.

Maintenance and troubleshooting

After each trip, rinse the downrigger with fresh water, paying special attention to the cable, the motor, and the release mechanism. Salt water corrodes stainless steel over time, and sand or debris in the gears will wear them out. Wipe the cable dry and check it for fraying, kinks, or broken strands. If you see damage, the cable should be replaced — a frayed cable can snap under load.

If the release won't trip when a fish bites, the tension is probably set too tight. Loosen the adjustment screw slightly and test again. If the release trips on its own while trolling, tighten the screw. If the motor won't wind or unwind smoothly, check for debris in the gears or a bent cable. If the cable counter is off by more than a few feet, it may need recalibration — check your downrigger's manual for the procedure.

Store the downrigger with the weight fully wound in and the cable slack — don't leave tension on the cable for weeks at a time. If you're storing the boat for the season, consider removing the downrigger and storing it indoors to protect it from weather.

Frequently Asked Questions

How deep can a downrigger actually fish?

Most downriggers can reach 200 to 300 feet, but practical depth depends on your boat and cable length. A typical setup fishes comfortably to 100 to 150 feet. Deeper water requires longer cable and heavier weights, which means slower lowering and more weight to manage. Check your downrigger's specifications for maximum cable length.

What's the difference between a line-clip release and a rod-holder release?

A line-clip release pinches your fishing line and trips when the fish pulls hard — it's simpler, lighter, and works well for trolling. A rod-holder release holds your entire rod and trips when the rod bends — it gives you more feel and control, and works better for vertical jigging or when you're not actively trolling. Most trolling anglers use line-clip releases.

Can I use a downrigger with light tackle?

Yes. The downrigger carries the weight, not your rod. You can use a light spinning rod or baitcasting rod with a downrigger and fish deep without the strain of dragging a heavy sinker. This is one of the main advantages — your rod stays light and responsive, so you feel bites better and fight fish more easily.

What happens if the cable breaks while I'm fishing?

The weight sinks to the bottom and the downrigger arm swings up. You lose the weight but not the boat or the downrigger itself. This is rare if you maintain the cable and don't exceed the weight limit. Inspect the cable regularly for fraying or kinks, and replace it if you see damage.

Do I need two downriggers or can I fish with one?

One downrigger works fine and is a good starting point. Two downriggers let you fish two depths or two areas at once, which covers more water and helps you find where the fish are holding. Many anglers start with one and add a second later.