MiserBird
Well Known Member
Doing a borescope inspection on my O320E2A with 188 hour low compression ECI cylinders and found the exhaust valves to be almost too
clean with a green dot in the center of some.
I have read that green is not good, but the location seems strange to me. I cruise at around 50% power, 325 CHT, 50deg ROP, 5.5 GPH ( by tach
time) 18in hg around 2200 RPM. One PMag 32 deg max on NGK BR8EIX's , one Slick on Tempest UREM37BY's. The plugs were white, with heavier light color deposits in the UREM37BY's than the very clean NGK's.
It has been said that it's difficult to damage a Lycoming at less than 65% power, but I'm beginning to wonder if I need to change any settings.
FWIW, the engine runs perfectly, and will idle down to 600 RPM on the EMag alone, with a Catto prop.
Thanks in advance for any insight, and advice.
clean with a green dot in the center of some.
I have read that green is not good, but the location seems strange to me. I cruise at around 50% power, 325 CHT, 50deg ROP, 5.5 GPH ( by tach
time) 18in hg around 2200 RPM. One PMag 32 deg max on NGK BR8EIX's , one Slick on Tempest UREM37BY's. The plugs were white, with heavier light color deposits in the UREM37BY's than the very clean NGK's.
It has been said that it's difficult to damage a Lycoming at less than 65% power, but I'm beginning to wonder if I need to change any settings.
FWIW, the engine runs perfectly, and will idle down to 600 RPM on the EMag alone, with a Catto prop.
Thanks in advance for any insight, and advice.
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