Originally Posted by
dave23
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.?
nothin you've done wrong... but take a look at the back block (when removed)... the threaded bit is secured to the actual block with an internal nut, so it can be indexed. It's probably come loose and allowed the threaded section to rotate, buggering up the indexing.
Tighten than nut (a bit, not fully), screw the block in, make a note of how many degrees of rotational adjustment you need, take it apart, adjust. Repeat as necesary. Mark it to guard against unplanned movement during test fitting. There should be a "gripping washer" like a aggressive star washer, but bigger, between the threaded section and the actual block. Once you are certain on alignment, that threaded section can be threadlocked in place to the block.
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.