Fx impact mk2 177 uk legal

Hi I've got a fx impact mk2 UK legal 177 I've changed the cocking block to a sabre tactical cocking block so had to remove pellet probe and rod and attach them in New block , problem what's happened is power has dropped to 6ft lb just wondered if anyone new why this might of happened any advice would be grateful.
Baz
 
You might have it adjusted incorrectly so now the transfer port in the block doesn't line up with the probe properly.
Glem thanks for getting back to me, I've had ago at doing that still seems to be pushing out about 6ft lb also I've replaced the small seal in the probe end of the barrel, before I changed that block to sabre tactical one it was running perfect so can't understand what's happened,
 
Glem thanks for getting back to me, I've had ago at doing that still seems to be pushing out about 6ft lb also I've replaced the small seal in the probe end of the barrel, before I changed that block to sabre tactical one it was running perfect so can't understand what's happened,
When you put the new block on how far you screw it onto the rod effects where the probe lines up when in the cocked position.

Ensure you're around here in the cocked position.

20221007_121656.jpg
 
When you put the new block on how far you screw it onto the rod effects where the probe lines up when in the cocked position.

Ensure you're around here in the cocked position.

View attachment 295479
Glem sorry for late reply I will have ago at it and try get it how yours is set in the photo, also thought could it maybe the hammer spring might have moved causing loss of power, anyway hopefully I will have ago at it later and see how it goes , much appreciated by your help by the way