Canadian Airgun Forum

Looking to get a heavier primary spring. Can someone point me in the right direction where to purchase? I’m in Calgary.

I’m putting in a tss in a stock marauder and get get the FPS over 700. VMs wide open at 6 turns. Hammer tension backed out as per video tutorials.

There are two adjustments on the hammer on an MRod.... The smaller, inner hex key adjusts the hammer TRAVEL, and unless you are trying to detune the gun for low pressure operation, you want that one backed out CCW as far as it can go.... The hammer spring PRELOAD (the larger hex key from the back) decreases as you back it out CCW, reducing the velocity.... To increase velocity that one needs to be turned in CW....

You already have the velocity adjusting screw on the side of the tube backed out 6 turns, but I should mention that there is a setscrew on top of the actual adjusting screw.... Did you take that out before making your adjustment of the velocity screw to 6 turns out CCW?....

Springs are available from Trakar Spring in Ontario....

Bob

_________________
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!

Thanks for the info.
Yes removed the grub screw, tightened vms screw (cw) first then backed out ccw 6 full turns. It’s just with the new tss design I cannot get the hammer spring preload enough to get up to 800+.
It’s a new to me gen2 and as far as know was just tuned no mods. Hammer is stock. In the pic below spring tension is backed out on both (tss on left). Springs are same length.

Would anyone be able to help me with part numbers for a 10 & 12lb spring?

I’m such a newb at this!