petehowell
Well Known Member
We have had as great few months with th plane, covering the midwest to visit family and friends. The hours were adding up and somewhere over the Mississippi today, the old girl rolled over 2650 hrs, time to drop the oil and continue the longitudinal study.....
The Setup:
- RV-9A/O-320/Carb/Dual EI/Hartzell/Phillips XC 20W-50
- Lots of Mogas, Lots of LOP
1.25 qts of oil were `added over the 50 hours - .75qt in the last 15 hours. This is a common pattern for this engine.
The Compressions readings (warm) were all in range at 72/78/76/78.
Oil sump screen had a few chunks of crushable carbon, and the K&P filter had carbon crumblies in it. magnet had some ferrous dust on it.
Lower spark plugs were tan-ish in color and dry.
Valve pics below - The exhaust pics are not great - let's just blame the photographer and move on.......
#1 Intake
#1 Exhaust
#3 Intake
#3 Exhaust
#2 Intake
#2 Exhaust
#4 Intake
#4 Exhaust
Annual speed check numbers coming soon.........
The Setup:
- RV-9A/O-320/Carb/Dual EI/Hartzell/Phillips XC 20W-50
- Lots of Mogas, Lots of LOP
1.25 qts of oil were `added over the 50 hours - .75qt in the last 15 hours. This is a common pattern for this engine.
The Compressions readings (warm) were all in range at 72/78/76/78.
Oil sump screen had a few chunks of crushable carbon, and the K&P filter had carbon crumblies in it. magnet had some ferrous dust on it.
Lower spark plugs were tan-ish in color and dry.
Valve pics below - The exhaust pics are not great - let's just blame the photographer and move on.......
#1 Intake
#1 Exhaust
#3 Intake
#3 Exhaust
#2 Intake
#2 Exhaust
#4 Intake
#4 Exhaust
Annual speed check numbers coming soon.........