Richard Wahlstrand 81 #1 Posted May 22 Folks, I have experienced sluggish starting on my 416-8 and, for several years, on my other Kohler K-series-equipped tractor. After reading testimonials here and researching on Youtube, I bought a Facet low pressure electric fuel pump and planned to install it on one tractor as an experiment. I also checked the function of each fuel pump. Both are pumping good fuel flow I saw a posting about the effectiveness of a fuel line check valve. So I ordered two (@ $6 each) and installed them on the tractors. https://www.amazon.com/dp/B07J53N4FN?ref=ppx_yo2ov_dt_b_product_details&th=1 After installing them, I am having quick starts. The test will be after the machines sit for a couple weeks. I don't regret buying a Facet. I will have it on-hand in case I want to install it in the future. Thanks to forum members for sharing their lessons learned. Richard W. on the East Coast of Iowa 5 Share this post Link to post Share on other sites
squonk 41,118 #2 Posted May 22 I tried 2 of those check valves and neither one worked worth a hill of beans.Facet pump fixed the issue of sitting a few weeks and hard starting.. 5 Share this post Link to post Share on other sites
ebinmaine 67,498 #3 Posted May 22 I have a facet on one but primer bulbs on several. Those have been working well for us. 4 Share this post Link to post Share on other sites
WHX?? 48,815 #4 Posted May 22 Two checks on 520s and didn't help after long sits. Thought it was a good idea and the answer but not. 1 Share this post Link to post Share on other sites
Ed Kennell 38,175 #5 Posted May 23 I use the primer bulbs on all my tractors that have the fuel tank under the seat. If the fuel pump totally fails, I replace it with an electric pump. All the mechanical and pulse fuel pumps have two check valves. Very few of them are drop tight and will allow fuel to drain back into the tank causing the pump to lose its prime. Adding a third check valve does not seem to be the answer. If you add an electric pump, you should bypass the mechanical pump to remove the risk of pumping fuel into the crankcase thru a ruptured diaphragm. 3 Share this post Link to post Share on other sites
Pullstart 62,879 #6 Posted May 23 The obvious fix is… don’t let them sit for weeks unused! 2 2 Share this post Link to post Share on other sites
peter lena 8,627 #7 Posted May 23 @Ed Kennell have also done some detailing on the carb choke plate area , verifying the ease and complete closure of it , added a very light spring closure assist , also detail lube assist . once it worked with consistent starts , did the same details to the other 2 horses , been very solid for me . pete 1 Share this post Link to post Share on other sites
