The MAIN REASON for Marlin jams is twofold...
1. crappy Remington Golden Bullsquish or Thunderduds ammo
2. someone either at the factory or a previous owner didn't set the ejector wire properly.
1. The Bullet thing is easy, just use anything but RGB's or thunderduds. Remington's .22 ammo is the dirtyest and least consistant ammo I've ever run across...NOTHING is dirtyer shy of Blackpowder...and as far as consistancy, I bet blind capuchin monkeys could make better ammo at Remington than the stoners running the .22lr line now...at least they'd get the powder levels right.
2. The Ejector wire should be set at a 45-degree angle twards the feed throat and pointing slightly upwards.
Look at the pics in this thread, your wire should look about the same.
Marlin FTE repair
The Marlin 795 will EASILY outshoot the Ruger 10/22 & Remmy 597's.
They are frankly, much more precise than the average shooter is.