Engine Tuning Tip

Courtesy of: Sean W. Daley

When dealing with the fuel air mixture the general rule of thumb is more air means more gas. When air is warm it is much less dense than cold air (not ideal for power, but I can't think of too many boats that run well on ice) What this is saying is that warmer should be leaner. I base this statement on the the afore mentioned information.

There is also a "simple" way to baseline your fuel to air ratio. Using the following equation... (engine displacement in cubic inches divided by 3456) x desired rpm) divided by 14.4  ... this will give you in cubic inches exactly how much fuel your engine will consume at the ideal mixture at the desired rpm in one minute run time.

Note: the previous equation will also tell you the optimal size throttle body for your engine, just don't divide by 14.4.