I'd say it's a Howard right enough, after looking around at pics on the Web. Doesn't quite look to be a Gem though - those are a big, heavy [around 300kg] machine.

A Bullfinch, or its successor the H200, look likely candidates. With the optional wheel weights!

Have a look at some pics at http://howardgem.webs.com

Other good Howard sites: http://www.howardregister.com http://www.howard-rotavator-spares.com/manuals.php

Online viewable parts list at https://www.yumpu.com/fr/document/view/11297597/bullfinch-h200-parts-listpdf

Manual and parts list for the very similar UK Model 200 is at http://www.allotment-garden.org/rotovator/

If the gearboxes/shafts are all OK, it may not be worth spending much time on the Villiers. About a 3.5hp Briggs or Honda/Chonda would suit it.

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."