Next on the list of factors is pressure. When you increase the surrounding pressure, you can usually dissolve more gases in the liquid. Think about your soda can. It is able to keep the fizz inside, because the contents of the can are under higher pressure.
Assuming a prop, it depends on how you are propped but with a redline of 6000 rpm, most outboards perform best with a cruise in the 4000-4400 rpm range. If you want top fuel economy, get a floscan or such and see what is the most efficient for your engine and prop.
how do u set the timing on an outboard.both carbs have been rebuilt. new spark plugs, vacuum line has been replaced. has compression in all four cylinders, gettin fuel in all four, even tried starting fluid. Submitted: 4 years ago.f the carbs are clean, filled with fuel and you have good compression, it has to get fuel to the cylinders. Tell me exactly what the engine is doing or not doing. Ask Your Own Boat Question. Customer: replied 4 years ago.