Backlash while using a baitcasting reel happens for several reasons. If the cast control is too loose and the lure is heavy, it will pull the line from the spool faster than you can stop it. Also, if the lure is too light and you are trying to make a long-distance cast, you are usually throwing harder than necessary and this too will cause a backlash. Finally, if the lure touches the water and you don't stop the reel from spinning, this will result in a backlash. There are specific techniques you'll need to adopt to cast a baitcasting reel without backlash.
Properly set up the reel before casting the particular bait you have selected. This adjustment needs to take place any time you change lures. The weight of each lure is what causes many of the backlash problems you will encounter. Start by reeling the attached lure up to the tip of your rod. With your thumb on the spool holding the lure and line from moving, depress the bail release button. Gently remove your thumb, releasing the pressure you have on the spool and see how the lure falls from the rod tip. If the lure falls quickly, the spool is too loose, and you will experience backlash if you try to cast it. if the lure stays stationary and does not move, try bouncing the tip slightly to see if the lure drops at all. Ultimately you are trying to get the lure to fall at a very slow rate of speed by its own weight with just a slight bob of the rod tip.
To make the adjustments to the reel, turn the cast control button on the side of the reel. Turning clockwise tightens the spool, while turning counter clockwise will loosen the spool. Some reels will have a magnetic control on the opposite side of the reel from the cast control knob. If so, turn the magnetic control to its maximum and then set the cast control knob so the lure very gently and slowly falls. As you become more proficient, you can adjust the magnetic control down to make it easier to cast and not have to adjust the cast control button.
After you have set the cast control and magnetic cast control knobs, you are ready to cast. Start by leaving about 5 to 6 inches of line between the rod tip and the hanging lure. As you bring your arm back to cast, turn your wrist so the handles of the reel are pointing up. The reel will be turned sideways. Hold the spool by placing your thumb on it for pressure so that when you push the bail release button, your lure doesn't start falling prematurely. Depress the button and as you cast the lure forward, release your thumb allowing the lure to pull the line from the reel. Make sure the reel is turned sideways and the handles of the reel are pointed up. Keep a close eye on the lure and as it makes contact with the water, place your thumb on the spool as a brake, stopping it from free spooling any further.
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