← All explained questions · Supplemental · II — Preflight Procedures
The proper procedure when starting an engine that has been suspected of flooding is
Choices
additional priming, mixture rich, throttle full open.
More priming worsens flooding.
✓ mixture IDLE CUT-OFF, throttle fully OPEN, crank until engine fires, then immediately advance mixture and reduce throttle.correct
Flooded engine start: mixture in IDLE CUT-OFF (no fuel), throttle FULL OPEN (maximum airflow), crank — the airflow leans the over-rich mixture in the cylinders. As soon as engine fires, smoothly advance mixture to RICH and reduce throttle to idle to prevent over-speed. POH governs; some manufacturers vary.
wait 30 minutes for fuel to evaporate.
Long wait may work but isn't the standard procedure.
remove spark plugs and dry them.
Pulling plugs is mechanic work, not pilot in-the-field.
Why
Flooded engine start: mixture in IDLE CUT-OFF (no fuel), throttle FULL OPEN (maximum airflow), crank — the airflow leans the over-rich mixture in the cylinders. As soon as engine fires, smoothly advance mixture to RICH and reduce throttle to idle to prevent over-speed. POH governs; some manufacturers vary.
FAA source: Aircraft POH/AFM engine-starting/flooded-start procedure; FAA-H-8083-3C, AFH Ch. 2browse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.