Welcome Guest. Sign in or Signup

1 Answers

Flooded engine

Asked by: 1692 views Aircraft Systems

Greetings! i was wondering when we undergo flooded engine caused by overpriming , why we start engine with throttle - full open before re- start. and why we mixture cut-off  

Ace Any FAA Written Test!
Actual FAA Questions / Free Lifetime Updates
The best explanations in the business
Fast, efficient study.
Pass Your Checkride With Confidence!
FAA Practical Test prep that reflects actual checkrides.
Any checkride: Airplane, Helicopter, Glider, etc.
Written and maintained by actual pilot examiners and master CFIs.
The World's Most Trusted eLogbook
Be Organized, Current, Professional, and Safe.
Highly customizable - for student pilots through pros.
Free Transition Service for users of other eLogs.
Our sincere thanks to pilots such as yourself who support AskACFI while helping themselves by using the awesome PC, Mac, iPhone/iPad, and Android aviation apps of our sponsors.

1 Answers

  1. John D Collins on Oct 13, 2013

    With a flooded start, the mixture is by definition way too rich. There is likely to be whole fuel in the cylinders. For an engine to start, the mixture must be in a certain range, much leaner than the flooded condition. By opening the throttle, you are adding the maximum amount of air and by having the mixture at idle cutoff, no more fuel will be put into the flooded engine. Eventually as you crank the engine, the fuel in the engine will reduce as more air enters the cylinders and combines with the previously available abundance of fuel. When the mixture reaches the range needed for combustion, the engine will start and run until the fuel is exhausted. Once the engine starts, you have to retard the throttle and advance the mixture to keep it running.

    +5 Votes Thumb up 5 Votes Thumb down 0 Votes

The following terms have been auto-detected the question above and any answers or discussion provided. Click on a term to see its definition from the Dauntless Aviation JargonBuster Glossary.

Answer Question

Our sincere thanks to all who contribute constructively to this forum in answering flight training questions. If you are a flight instructor or represent a flight school / FBO offering flight instruction, you are welcome to include links to your site and related contact information as it pertains to offering local flight instruction in a specific geographic area. Additionally, direct links to FAA and related official government sources of information are welcome. However we thank you for your understanding that links to other sites or text that may be construed as explicit or implicit advertising of other business, sites, or goods/services are not permitted even if such links nominally are relevant to the question asked.