I'm contemplating the purchase of a Yamaha 2.5 hp 4-stroke outboard to power my 1,300 pound 19'-6" Caledonia yawl.
My current motor is a 1981 2 hp 2-stroke Suzuki. While the old motor starts, runs and pushes the boat just fine, it's age and all of the bugaboos of 2-strokes are making me think that a 4-stroke would be a good change.
EXCEPT! The Suzuki weighs 22 pounds while the Yamaha comes in at a portly 38 pounds. Therefore, fuel consumption (or lack of it) seems to be the major deciding factor. Are modern small 4-stroke engines really as fuel efficient as the manufacturers would have me believe? What kind of real world fuel mileage are you all getting from your motors, 2-stroke or 4-stroke? I would hate to fork over $800+ for little or no gain in fuel economy.
Here's my thinking: The weight of the Suzuki + 3 1/2 gallons of gas = the weight of the Yamaha + 1 gallon of gas. Is it reasonable to assume that the 4-stroke Yamaha will go as far on 1 gallon as the Suzuki does on 3 1/2 gallons?
In the Swamp where it's been raining for 40 days and 40 nights and I can't go sailing.