i think it might be a mk 10 as i found another one localy . seems a later model and id plate says it is a mk 12 , a few differences too . could they be electronic ignition ?has a different flywheel , better frame this one you can at least get at the starter pulley ! and 3 wheels front and rear a covered cutter too . pic's too come as only have my phone now frown camera died finaly . the newer engine is made in ballarat . cheers