I was looking into cleaning up the engine bay of the old 565 so I could see where my hydro leak was and after I pulled the side covers off I saw this part. This is in the engine bay, in the rear right side. I am not sure what it is but this seems to be my main leak. It appears to not be drastic but at $40 per 5gal of 303 I maybe can replace this cheaper then all the buckets of fluid I will need over the years? So far I have put in ~3gal in the last year keeping in mind this machine is used a couple weeks a year. https://plus.google.com/116800497580519613502/posts/HKevJJEdNC1 I have a service manual fopr the L565 itself but not an engine manual so no clue what I am looking at here. Ideas?