Engine Starting - Cessna 172N Skyhawk Quick Reference Manual

Engine Start (Flooded)
1. Brakes....................................................................................................................... .......... Hold
2. Throttle....................................................................................................................... Open Full
3. Fuel Pump.............................................................................................................................. On
4. Mixture................................................................................................................... Idle Cut-Off
5. Engine/PFD Indicators................................................................................... Monitor/DECIDE
6. Magnetos......................................................................................................... Select Both/Start
7. Mixture (On Start)..................................................................................................Advance Full
8. Throttle............................................................................................................................. Retard
9. Oil Pressure................................................................................................................. ....................... Check
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If a Fire Begins, proceed to Engine Fire (Starting)
Excessive priming can result in a fuel/air mixture that is too rich. Reducing the mixture (fuel) while increasing the amount of air (throttle) can
Common Errors:
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Not reducing the mixture to idle before starting
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Failure to reduce the throttle
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Failure to hold the brakes
Engine Start (Fouled Spark Plugs)
1. Brakes....................................................................................................................... .......... Hold
2. Throttle............................................................................................................ Open 2000 RPM
3. Mixture........................................................................................................... Lean 50
4. Engine............................................................................................................. Run ~30 Seconds
5. Engine RPM/PFD Indicators.......................................................................... Monitor/DECIDE
6. Magnetos (L/R).......................................................... Max 175 RPM Drop / 50 RPM Difference
7. Throttle.............................................................................................................................. Retard
8. Mixture......................................................................................... Advance to 100
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If Roughtness/RPM Differences Do Not Impove Seek Maintenance
Fouling is created by excessively rich fuel/air mixtures during prolonged ground maneuvers and/or failure to properly lean the mixture during
flight and causes a buildup of carbon deposits. If left unchecked, spark plug fouling results in engine roughness, hot spots, and detonation.
Common Errors:
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Not leaning the mixture while on the ground
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Engine overheating due to high oil temperatures during prolonged runup
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Failure to hold the brakes

Engine Starting

Description:
equalize this imbalance and start the motor.
Description:
o
of Peak
o
Rich of Peak
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