Marlin trigger adjustment..

Discussion in 'Technical Questions & Information' started by spiderman20, Jan 26, 2009.

  1. spiderman20

    spiderman20 New Member

    Dec 13, 2008
    I recently purchased a Marlin 917VS and when I sighted it in the trigger is hard to pull when it is near the end of it's throw. Is this a simple spring adjustment or is there something else I should do?
  2. LDBennett

    LDBennett Well-Known Member

    Dec 20, 2003
    Hesperia, CA
    While spring changes MAY help reduce the pull level, randomly changing them can lead to challenges.

    There are three springs that normally impact the pull level of the trigger: The trigger spring, the sear spring, and the hammer spring. Get the spring forces too low on the trigger spring and the trigger will not reset after the first shot is fired. Get the spring forces too low on the sear spring and the sear may not catch the hammer in recoil and the gun may go full auto (making it a machine gun and even if done by mistake is BATF illegal and they do prosecute, as some have found out). Get the spring forces too low for the hammer spring and you may get light firing pin strikes and the ammo may not go off.

    If you are a gun tinkerer and underestand trigger systems you might try buying one each of those spring. Cut one coil off the springs (one at a time verifying correct function each time) for each of the functions, one at a time. The trigger must have enough return action to reliably reset every time. The sear must catch the hammer every time the bolt moves to the rear. If you hold the hammer all the way back and flick the sear with a probe it must make an audible click with every flick. The hammer spring should not be reduced unless all else fails. Remove one coil at a time until the firing of a cartridge is just no longer reliable. Remove that spring and replace it with one that is one or two coils longer. But get into cold weather and the gun MAY become a problem.

    A Google search of the Internet may turn up an after market spring set for your gun that will reduce the trigger pull level by simply just installing it (???).

    To get the trigger "right" take it to a gunsmith who knows Marlins and have him do a trigger job on it. It is getting hard to find such gunsmiths because of the liability for such gunsmiths but there are one's out there who can do it. This is probably a better choice for someone who really doesn't know trigger system.


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