I. Introduction: Rome Before the Fall [click here for a brief overview of Roman history] After nearly half a millennium of rule, the Romans finally lost their grip on Europe in the fifth century (the 400's CE).
The 1989 SeaDoo SP featured a two-stroke, two-cylinder 587 engine with rotary-valve induction and a water-cooled exhaust system. The 587 jet ski used regular unleaded gas and SeaDoo oil injection. The bore and stroke was 3 inches by 2.5 inches and the compression ratio was 5.9 to 1.
Sea Doo 2 stroke 947 DI = $3.65/gal using $35/gal Sea Doo synthetic oil. Sea Doo 4TEC = $4.00/hr (added $1/hr for covering called for dealer oil, cooling & filter changes every 100 hours) (of course if you change your own fluids, you could cut that figure down a bit)