| C172SP | PA180 | |
| Fuel Pump | Used only to start the engine. Turn on for a few seconds just before starting. Turn off as soon as a flow of 5 gph
Sequence: Turn on fuel pump, mixture rich, turn off pump, mixture lean. Ignition to start, advance mixture to rich as soon engine “catches” |
Leave on until engine has started. Then turn on before take off and final decent.
IMPORTANT: leave on during takeoff and landing. Put fuel pump on your before take off and decent checklists!
|
| Mixture | Start lean. Make rich when engine fires | Set to rich from start |
| Carb heat | Not applicable | OFF during start |
| Primer | Not applicable | Prime as necesarry after turning on fuel pump and setting mixture rich |
Use of fuel pump on PA 180
Use the fuel pump, when starting the engine, during takeoff and landing. In other words
- Turn on prior to start.
- Turn off after start
- Turn on before takeoff
- Turn off when at a safe altitude
- Turn on before decent to land / approach
- Turn off after landing
Use of carburator heat on PA 180
Turn off, and leave it off during start, taxi and takeoff
Turn on before descent to land
