Home> Continental & Lycoming TroubleShoot
Burn marks on outside of cylinder barrel
1. Piston or rings seizing against cylinder barrel. This is usually caused
by insufficient piston to cylinder barrel clearance or use of chrome rings
in chrome (Cermichrome cylinder). See symptom "Scuffed
cylinder walls".
2. Excessive piston temperature. Can be caused by running the engine
without the cowling.
3. Crack allowing combustion gas to leak.
 US
NAVY "Oxygen Sense" 1944, high altitude flight requires oxygen
| 