grinchsr 647 #1 Posted October 24, 2022 I have a 51 micron fuel filter I want to install on an Onan. Would that cause too much strain for the pump? Share this post Link to post Share on other sites
lynnmor 7,813 #2 Posted October 24, 2022 48 minutes ago, grinchsr said: I have a 51 micron fuel filter I want to install on an Onan. Would that cause too much strain for the pump? Not a problem. Just think what happens when the inlet valve (needle & seat) is closed, that is a complete blockage. Share this post Link to post Share on other sites
grinchsr 647 #3 Posted October 24, 2022 Good answer never thought of it that way. 1 Share this post Link to post Share on other sites
Pullstart 66,690 #4 Posted October 24, 2022 I don’t know the answer to the question, but keep in mind there is a difference between blockage BEFORE and blockage AFTER the pump. Needle and seat is blocking the pump’s flow, but it is NOT starving the pump. Share this post Link to post Share on other sites
lynnmor 7,813 #5 Posted October 24, 2022 3 hours ago, Pullstart said: I don’t know the answer to the question, but keep in mind there is a difference between blockage BEFORE and blockage AFTER the pump. Needle and seat is blocking the pump’s flow, but it is NOT starving the pump. The fuel filter on an Onan is after the pump. 1 Share this post Link to post Share on other sites
Pullstart 66,690 #6 Posted October 24, 2022 14 minutes ago, lynnmor said: The fuel filter on an Onan is after the pump. See how much I know? Share this post Link to post Share on other sites
lynnmor 7,813 #7 Posted October 24, 2022 Just now, Pullstart said: See how much I know? You know plenty, you're just stuck in a time warp. 1 Share this post Link to post Share on other sites
Pullstart 66,690 #8 Posted October 24, 2022 @lynnmor my K-181 has no fuel pump Share this post Link to post Share on other sites
grinchsr 647 #9 Posted October 24, 2022 Thank you WH experts. Share this post Link to post Share on other sites
RED-Z06 2,567 #10 Posted October 25, 2022 I try to run a filter before and after the pump..never put much thought into micron size except i try to go fine...any filter will free flow more than an engine could ever consume Share this post Link to post Share on other sites
