My engine has started making a "clack, clack, clack..." noise on startup. It lasts for 10-15secs. Runs pretty rough during that time. Then cleans up and runs fine. See the attached YouTube video I recorded of the noise.
Is it a sticking valve? But there is no obvious problem when pulling prop through.
Is it a bad lifter?
It does blow black soot out the exhaust while the noise is occurring.
When I shutdown yesterday the prop stopped at the 11 o'clock position which isn't normal. Usually stops at the 1 o'clock, or so. Could be an anomaly. Could be a clue.
Any good ideas?
Is it a sticking valve? But there is no obvious problem when pulling prop through.
Is it a bad lifter?
It does blow black soot out the exhaust while the noise is occurring.
When I shutdown yesterday the prop stopped at the 11 o'clock position which isn't normal. Usually stops at the 1 o'clock, or so. Could be an anomaly. Could be a clue.
Any good ideas?
