Mid handle trigger released issue.

    I'm hoping some here that have experience building and tuning mid handle guns can chime im.


    After finishing the 2 mid handled 48" guns, I'm having an issue with both guns, both Mechs on releasing early. One actually released in the pool with a band loaded. Please see attached link for video.
    After talking with Dan, the issue of preload on the trigger came up. I have the triggers pre loaded up a bit just to remove excess travel but still have a decent length pull before engaging.
    Should there not be any preload on the trigger via a pushrod?


    http://www.youtube.com/watch?v=4krOB1-Qmk0

    Edited once, last by Brendon ().

    It's hard to learn much form that video but at first guess it would seem the shaft isn't engaging properly or the line release isn't set right. Does the notch on the shaft match the sear on the mech? When the line release lets go is the shaft released?

    The mech is for American notched shafts, using neptonics American shafts.
    When the line releases, it also released the spear.
    Forgot to mention, I can not get the mech to release incorrectly outside the gun. It's fine on the bench.

    I do not have any first knowledge of that mech, but it seems to have a wee bit of clearance when you engage the shaft. I would back way off on any preload and see if that helps, then dial some back in if needed.


    Make sure the tip of the gun does not point skyward in the pool when testing....They go a long way out of water.;)


    Cheers, Don

    "Great mother ocean brought forth all life, it is my eternal home'' Don Berry from Blue Water Hunters.


    Spearfishing Store the freediving and spearfishing equipment specialists.

    I don't build mid handle spearguns so I have no first hand knowledge of how to set up the push rod. But I'm pretty sure of one thing, I wouldn't pre-tension any trigger mech unless it was specifically designed for such a purpose. Good trigger mechanisms are designed to offer a comfortable full trigger pull at high loads, to my mind this doesn't lend itself to the trigger being permanently depressed even a fraction of it's range of motion while under load. The idea just sounds dangerous to me. There has to be a different way to eliminate play in the push rod. Perhaps connecting it to the remote trigger.

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