Hello Lennyb and Kye

The prototype used the Villiers Midget Mk2.
Merv had these engines for his first mower, the 14" reel mower
that I have written about:-

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=37288

Good resolution photos here:
http://www.powerhousemuseum.com/collection/database/?irn=158738

Hope this helps.
----------------------------
Jack