Hi, hope you can help me put my mind at rest or possibly otherwise. Recently obtained an Irvine Mills 1.3 described as BNIB with box, all documents and other bits. After I recieved it I gave it a close inspection with an eyeglass and there are no signs (lug marks, piston verticle marks, smell etc) of it being run. It turns smoothly with plenty of compression. But, the prop driver has a large amount of clearance behind it to the nose of the front of the crankcase(no wear signs). Also, the crankshaft moves freely back and forth in the crankcase and ball race, unlike my other two Irvine Mills 1.3's. Additionally, there is no serial number anywere on the mounting lugs. I think I've been sold a 'ringer' possibly made up from spares or put together by some other dubious activity. Its coming apart shortly but I wondered if anyone had any thoughts on this.
TIA