Hi grumpy, yes, that was it with the appalling cast iron cylinder 2 stroke Villiers with the porthole in the flywheel and of course the 18mm plug...obviously the same engine as yours. As yes, mine was equally as frustrating....it would never start when you wanted to mow...and eventually I got rid of it and got my first Scott Bonnar...a petrol Model 17 Supercut 18"....great machine...I wish I still had it.
