Walt Greer asks: Ran the 17′ Scout Costa through the Everglades National Park for it’s test with the new Etec 90 with great results. Total miles 131, total fuel consumed 14.7 gallons for an average of 8.89 mpg. Avg speed was 32 mph. at 4100 Top Speed was 41 @ 5500 rpm The Etec performs like the original 90 Yamaha 2 stroke and the economy is on a par with the Yamaha 90 4 stroke. Looks like we finally have a viable replacement for the 90 2 stroke Yamaha.