parsonsponyz 169 #1 Posted April 19, 2023 I know this has probably been answered before but couldn't find the number so here goes. I'm getting ready to help Scouts earn a merit badge and in preparation found out that I need some air filters for the 520 with factory Onan. Anybody have numbers. I'm thinking NAPA since that's where I need to get the other filters. Any help would be greatly appreciated. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,243 #2 Posted April 19, 2023 This one? 8-1/8" OD x 6-3/8" ID x 2-1/8" HT Onan 1401228, 1402522, 1402628, 140262801 Toro/Wheel Horse NN10175 replaced by NN10774 Napa 7-02247 Stens 100-149 Stens Pre-filter 100-875 Wix 46094 1 Share this post Link to post Share on other sites
lynnmor 7,561 #3 Posted April 19, 2023 Don't forget the pre-filter, teach the kids how to properly clean and oil them. 1 Share this post Link to post Share on other sites
parsonsponyz 169 #4 Posted April 20, 2023 Thanks so much for the quick response and large amount of information. I was able to order everything needed and should have it tomorrow, so plenty of time for this weekends activities. This is such a great forum with fantastic people. Share this post Link to post Share on other sites
