bsa mercury

[ggggr]

just replaced spring and piston seal on a old mercury,now the trigger block don't line up.
can any one tell me what ive done wrong.?

Proper fix--Adjust the nut.

other fix (if it is at say 4 o clock rather than 8 o clock) , take a file gently to the back of the cylinder until the block goes to about 5 o clock and then nip up.

If it is at 8 o clock, a bit of twine between the 2 "may" do the trick.