Thanks very much for that Grumpy
I put the Quantum cam shaft in my battery drill and the decompressor throws out at quite a low drill speed.
I am satisfied now with how this set up works and it will help me fault find in the future.
I now also under stand why larger ride on inteks don't start when this mechanism fails.
My spring repair has failed as it will not throw out at all, at full drill speed.
Loosing internet connection now for the day.
Cheers
