Ok here goes the next installment! Just finished in my workshop with the Dremel! Originaly the engine weighed in at 4lb 10oz as it left the blower. After much use of a hack saw and a dremel the weight is now down to 2lb 15oz with the stock steel propshaft, carb and exhaust! I probably could get it lighter by drilling through the fins and taking some metal away from the edges of the crankcase back plate but I think I will call it a day. I cut some of the front fins away below the manifold as these are in an area of high airflow and below the combustion line. The engine ran really cold when it was in the blower even though it was covered in grunge so I thought it would be ok if I lost a bit of metal from that area. Lets see. Next on the agenda is a light weight aluminium exhaust, new Walbro and to make the new propshaft. Pics below, starting to look more like a plane engine and less like an industrial unit!

Rich