You'd better believe it!
http://www.oldengine.org/members/diesel/PetterData/petter2.htmLook towards the bottom:
B Type Series I B2 12 to 18hp Diesel Compression 2B0001 to 2B3838 1949 to 1951
B Type Series II B2 13 to 20hp Diesel Compression 2B3839 - on 1951 to 1964
B Type Marine B2 18.5 to 19hp Diesel Compression 2BM3839 - on 1951 to 1964
B Type Series I B3 18 to 27hp Diesel Compression 3B0001 to 3B0499 1950 to 1951
B Type Series II B3 20 to 30hp Diesel Compression 3B0500 - on 1951 to 1964
B Type Marine B3 27½ to 28hp Diesel Compression 3BM0500 - on 1951 to 1964
B Type Series I B4 24 to 36hp Diesel Compression 4B0001 to 4B0740 1949 to 1951
B Type Series II B4 26 to 40hp Diesel Compression 4B0741 - on 1951 to 1964
B Type Marine B4 37 to 38hp Diesel Compression 4BM0741 - on 1951 to 1964
Note the Series I and Series II again, look familiar?
I think this one was all Petter and not the result of the earlier Cub/AV1 technology transfer.
HP is well up on the AV and AVA series, these were much bigger bore and stroke.
Realdiesel.co.uk quote:
B2 bore 110mm X stroke 110mm 20bhp @ 1500 Water-cooled. The also quote the makers as J H McLaren of Leeds, who were at the time part of the ABOE group that Petter and Cub Diesel belonged. No single cylinder version either, but they quote up to 4 cylinders.
I have always looked on the B as a Petter engine, and it had the family resemblance regarding the camshaft drive etc etc. Perhaps I ought to go down to Bridgewater and see if Brian still has that one! There are not many about.
Peter