When the tank/spraybar height relationship is excessive (spraybar higher) problems can manifest in a number of different ways. The first is it becomes difficult to get a run for the entire tank. As the fuel is used head pressure is reduced and this added to the fact that head pressure is already lower can result lean outs after a portion of the fuel is used. Another effect is when flying an airplane with low head pressure is when doing steep turns the added G load contributes to difficulty in getting fuel to the engine and tends to add to the the leanout condition so every time a steep turn is made with a good pull on the elevator the engine may stutter for a few seconds and come back up.

Finally nose high climbs may also result in early leanouts. These are some of the sysmtoms beyond what has already been mentioned that are the result of a poor Tank/spraybar relationship.


John