Hi
I work at Parkstone Yacht Club and have six of these in a row on the first pontoon in our Yacht Haven, plus a few on the moorings and other berths.
A lot of the original ones had mercedes diesels from build about 40HP.
If you want to come and have a look please get in touch, or I could put you in touch with the class captain who would happily answer your questions
Charlie 01202 738824 work