Paul,


These are two different carburettors...

The one on the engine seems to be the excellent #3222 (but discontinued due to high cost (?)) and the separate one is an older #3216, or #3219. For the Diesel you would want the 7 mm choke #3216.

It is not an original MVVS Diesel head button, but probably one made by Bob Davis. The MVVS unit is mostly brass and protudes into the cap between the cooling-fin part of the head, which has a cross-bar compression adjuster.

Contact Bob Davis on the Diesel forum, or on his web site.

The cooling-fin part of the head seems to be OEM MVVS.