These particular thumb latch catchers come in two parts top and bottom half. You can combine two halves to make one good catcher.
I forgot this when I found one with cracks at the bottom and left it there. It would have fixed one I have with a missing piece at the top, bridged with a section of thin plastic and screws, with electrical tape over it.
This mower goes strong despite most likely having a scored piston and/ or borec from my straight fuelling.
Maybe some remnant two stroke oil in the tank saved it from worse damage than it got. Better not to look white all is apparently well!
