Gettysburg Axel 4 #1 Posted August 3, 2025 Good afternoon I have a question hopefully someone will know. I have a 520 with the onan. In theory I believe it’s a vacuum hose I could be wrong. The part in question is the nut with a hole in it going to a hose. does anyone know where it goes to. It looks like it snapped off of something plastic. Any help is greatly appreciated. Share this post Link to post Share on other sites
Ed Kennell 44,086 #2 Posted August 3, 2025 It goes to the air filter light. It trips the light when the dirty filter is restricting the air. Share this post Link to post Share on other sites
Gettysburg Axel 4 #3 Posted August 3, 2025 Thank you for the information. I’ll have to look into getting it fixed. Share this post Link to post Share on other sites
lynnmor 8,384 #4 Posted August 3, 2025 Here is one place to buy the part. Share this post Link to post Share on other sites
