I have a first year 1895 45-70 (1971 i believe) that was having that same issue. I am pretty mechanical and there are a ton of You Tube Videos on taking these apart. The old Marlins are pretty simple machines compared to the Winchesters. I don't know how different the 93 is but i carefully took this 1895 down to every last part in about 30 minutes. Had to go easy to not booger up screws and keep track of which screw goes where. It had 50 years of filth and grime that i cleaned. I changed the mag spring, extractor, trigger, mag follower, cleaned the inside of the mag tube, followed several videos on correcting some angles on the lifter and lever interface and the old girl runs like a top now. I actually think the mag spring was the biggest issue that and the inside of mag tube was filthy and had a buildup. The one that was in it was short and very weak. The new one is about 2x or more longer than the actual mag tube. The new SS follower from beartooth mercantile is very smooth and dimpled to work with the leverevolution pointed ammo. If something is actually broken or worn beyond repair your gonna have to hunt parts which is not impossible. But you might be surprised how simple it is to take it apart, clean it up and replace some key wear out parts. Might get it working good on your own.
