pull cord pulls back violently when trying to start mower?

When trying to start my briggs and stratton engine the pull cord pulls back violently have been able to start the engine left it running for ten minutes then it will not start again??
John Klein, September 2004


done
sounds like a sheared flywheel key

mik w, October 2004
sounds like fly wheel key is sheard

mdalton@twlakes.net, September 2004
link Click here to see other fixes for Briggs & Stratton.