Hi Deano The base you have with 3 holes had a bracket which bolted to the three holes and in turn had a 4 stroke Kirby moteor on . I can email you a pic of 2 of these type bases just for the record. Some of the had another hole about 1 1/4 inch diameter and that make it looas though a 7F villiers motor was used but this was not so . The big hole was to have acces to the oil drain bolt on the 4 stroke motor I may still have one of the adaptor pltes for this model and if you are at all interested I will have a look around for it Cheers Joe Brown
