"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor design to
other piston singles, using engine oil to control the prop.

Granted, I'm not familiar with the 210 systems. But are you sure that the
hydraulic fluid is coming from the prop governor? Alternatively, are you
sure it's hydraulic fluid? Or can you (or anyone else) confirm that the 210
prop governing system uses hydraulic fluid rather than engine oil?

Pete