RBausher 0 #1 Posted March 15, 2022 (edited) I recently purchased a second 520H to fix up. I noticed a small oil leak from what’s seems to be a set screw just above the oil pan and under the PTO. It’s loose and seems to keep threading in without stopping. On my other 520, it seems to be recessed about two threads and tight. Any ideas as to what it is? Edited March 15, 2022 by RBausher Share this post Link to post Share on other sites
lynnmor 7,813 #2 Posted March 15, 2022 This very same issue came up some time ago, I don't know if there was a good answer. Do some searching in the forum, it might take awhile to go back in time. Onan made engines for many applications, and perhaps this hole was specified for something other than a Wheel Horse. 2 Share this post Link to post Share on other sites
