Paul Dietrich 19 #1 Posted October 21, 2021 I have a question.....I noticed a slight oil leak coming from the right side of the engine on my 520 H. It's right below the clutch pulley at the base of the engine. The leak is coming from an Allen Head set screw. I took the set screw out, applied silicone then reinstalled. My question is what is the purpose of this set screw....Thanks in advance... Share this post Link to post Share on other sites
Handy Don 10,552 #2 Posted October 21, 2021 38 minutes ago, Paul Dietrich said: I have a question.....I noticed a slight oil leak coming from the right side of the engine on my 520 H. It's right below the clutch pulley at the base of the engine. The leak is coming from an Allen Head set screw. I took the set screw out, applied silicone then reinstalled. My question is what is the purpose of this set screw....Thanks in advance... Picture please? Share this post Link to post Share on other sites
lynnmor 6,762 #3 Posted October 22, 2021 Some Onans had more than one port for oil draining, if it is a pipe thread that may be what you are looking at. A photo would be a big help. Share this post Link to post Share on other sites
Paul Dietrich 19 #4 Posted October 23, 2021 Sorry about no picture, I really don't know how to get one on here. I'll try to figure it out. Lynnmor, I don't think it's a oil drain, it's only a 1/4 " set screw. As I said thanks for any reply's ....... Share this post Link to post Share on other sites
onanparts.com 178 #5 Posted October 24, 2021 On 10/22/2021 at 6:17 PM, Paul Dietrich said: Sorry about no picture, I really don't know how to get one on here. I'll try to figure it out. Lynnmor, I don't think it's a oil drain, it's only a 1/4 " set screw. As I said thanks for any reply's ....... Multiple adapters and PTO configurations for the Onan's. Tapped and plugged is not unusual. A high temp RTV or liquid teflon pipe dope works fine to seal them up. Share this post Link to post Share on other sites
Paul Dietrich 19 #6 Posted October 25, 2021 I removed the set screw applied red R.T.V., no leak, thanks for every ones reply's ........... Share this post Link to post Share on other sites
WheelhorseBob 1,548 #7 Posted October 28, 2021 One of these guys? If so I do not know what they are for. Onan parts is most likely correct. Share this post Link to post Share on other sites
