petehowell
Well Known Member
9er-Pop-Hotel turned 2550 on the hobbs flying back from South Bend to see Mom the other day! So I drained the oil after landing and went back the next day and cleaned the K&P filter and Suction screen, scoped the valves, and checked to see if she still has any compression the cylinders.
The filter had the usual carbon flakes that crush between the fingers and the screen had bigger chunks of the same. The filter magnet had a bit of ferrous dust. Cold compressions were 72,74,78,76. Plugs were dry and tannish in color. I added 1 Qt over the 50 hours, .5 at 35 hours and rest at 42 hours - she always burns a bit towards the end of the oil life.
My setup is a carbed O-320, dual EI, I run almost all 91 mogas and am LOP 90% of the time. On the trip to South Bend she ran great - at 9500 on the way down I was 149KTAS at 5.9-6.1 GPH. I run 20W-50 XC but no idea if it makes a difference.
Here are the new valve pics:
Int #1
Exh #1
Int #3
Exh #3
Int #2
Exh #2
Int #4
Exh #4
The filter had the usual carbon flakes that crush between the fingers and the screen had bigger chunks of the same. The filter magnet had a bit of ferrous dust. Cold compressions were 72,74,78,76. Plugs were dry and tannish in color. I added 1 Qt over the 50 hours, .5 at 35 hours and rest at 42 hours - she always burns a bit towards the end of the oil life.
My setup is a carbed O-320, dual EI, I run almost all 91 mogas and am LOP 90% of the time. On the trip to South Bend she ran great - at 9500 on the way down I was 149KTAS at 5.9-6.1 GPH. I run 20W-50 XC but no idea if it makes a difference.
Here are the new valve pics:
Int #1
Exh #1
Int #3
Exh #3
Int #2
Exh #2
Int #4
Exh #4