Erimo
Well Known Member
My aircraft is finish and I?am waiting for the ?permit to fly?. So I only ran the engine 6 times and taxi 2 times.Engine timer is 1 hour and 1/2.
Today, after 2 weeks without running the engine I made a start and warm up, for the first time with cowls.
I found that even if the engine has started well, it did not turn perfectly (rough and even at some engine speeds, ?misfires?).
Pmag L : -150 RPM / Pmag R : -150 RPM
Findings: CHT and EGT of cylinder # 1 lower than others: CHT max 111 ? F for 250? to 280 ?F on other cylinders. EGT less than 1000 ? F against 1200 ? F.
Engine stop after 10 minutes.
During firt starts and warm-ups : temperatures substantially identical on the 4 cylinders.
Engine : IO-390 exp, new, from "Van's". Two Pmag (timing controled today, 2? after TDC).
Have you suggestions ?
Today, after 2 weeks without running the engine I made a start and warm up, for the first time with cowls.
I found that even if the engine has started well, it did not turn perfectly (rough and even at some engine speeds, ?misfires?).
Pmag L : -150 RPM / Pmag R : -150 RPM
Findings: CHT and EGT of cylinder # 1 lower than others: CHT max 111 ? F for 250? to 280 ?F on other cylinders. EGT less than 1000 ? F against 1200 ? F.
Engine stop after 10 minutes.
During firt starts and warm-ups : temperatures substantially identical on the 4 cylinders.
Engine : IO-390 exp, new, from "Van's". Two Pmag (timing controled today, 2? after TDC).
Have you suggestions ?