OK I just tried NornK s solution.it works on full cranks like mine.real easy to pull.at least it was cos I just blocked 2 holes with hot glue ( just wanted to see if it worked) yep that's definitely it. The hot glue only lasted 1 pull.now I can do a proper fix..so I guess as Norm says it slows down the operation. Of the decompressor giving it time to Work. Or release some of the pressure before closing.
I love using this mower but I never did like starting the thing
Brilliant

If my collection is complete ( then how come i keep buying stuff ? ) 🤔🤔🤔🤔🤔