rotax aircraft engine

This is a Rotax 503 UL provision eight aircraft engine , It has a single spark plug per cylinder electronic ignition , C.D.I , a really good one ! OK , Like all the Rotax engines I sell I usually do not include the gearbox or the exhaust ? muffler ? systems in the listings , Reason being that there is three different gearboxes and four different ratios for this engine , also NOTE there is four different muffler/ exhaust systems also for this engine , I just feel it is better for the buyer to purchase whatever gearbox and ratio to fit their application , Aircraft ,Trike , powered parachute or off road buggy and same with the four different mufflers , I feel buyers and sellers both happy , The buy it now price is $ 3600. which include the shipping to you in the USA only , Thanks for looking