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Great thread here. I have been looking for a while to see the difference in economy between a "legacy" two stroke vs. a modern 4 stroke, specifically a Suzuki DF140. I have a 1984 Outrage 18 with a 2003 Bombardier Johnson 150 motor. Motor has approx. 1200 hours on it. Runs great. Problem is - it runs great. At this point I cannot justify a re-power because the engine runs so well. But if I needed to re-power now, I am convinced that the Suzuki 140 is the way to go - for me. Weight is the primary concern. Yamaha 150 motor is heavy as you all know. Was at the marina this morning. Talked to a guy who had two Suzuki 140s on his boat. While both engines were at idle dockside, you could barely hear them. Two motors! I just couldn't believe it! Am excited to hear that an owner of the same Outrage model as mine now has a range of 300 miles for a tank of gas with the Suzuki 140. I could easily travel out to the "ledge" here in St. Augustine (60 miles +/-) fish, then come back and burn about 1/2 tank of fuel. That's crazy good. Thanks all for posting the info.