The Bo fuel flow indicator is surely one of those that may appear complex to read. Actually, it’s fairly simple.
In this how-to you will find all the informations you need to know about it.
How-to: read the Bonanza Fuel Flow Gauge
The fuel consumption is different that the one reported in the performance tables
Keep in mind that the engine manufacturer usually provides the power output/fuel flow tables with an average of the 10% of accuracy. This means that a 10% of error is still admitted. That said, always check the performance tables for