Hi Grumpy
well the new adjuster nut turned up and despite my hopes was not made of gold
....it is now installed and timed according to your previous email and has made no difference...the starter cannot turn the motor (but will do so if I remove the spark plug).
In one of your earlier emails you said "The engine has a decompressor, as nearly all OHV mower engines do"...is it possible this is not functioning? if so suggestions on how to fix would be appreciated.
Of course all of this is making the spare vanguard motor looking more attractive!
thanks again
Steve