old cub pilot
Registered User
I have a J3 with a C-90 overhauled in 1995. New crank, std cylinders. It now has 350 hours smoh
First flight of day turns 2450/2475 on take off. Land pull prop through and engine feels tight, fly 2 hours later will only turn 2350 on takeoff and it takes about 1" more throttle to maintain cruise 2300 in cruise. After about 20 minutes of flight throttle position back to normal. Land pull prop through feels tight. Cool over night pull through all feels normal.
Ring clearance checked good, piston clearance good.
Any ideas?
Thanks in advance
First flight of day turns 2450/2475 on take off. Land pull prop through and engine feels tight, fly 2 hours later will only turn 2350 on takeoff and it takes about 1" more throttle to maintain cruise 2300 in cruise. After about 20 minutes of flight throttle position back to normal. Land pull prop through feels tight. Cool over night pull through all feels normal.
Ring clearance checked good, piston clearance good.
Any ideas?
Thanks in advance