pfrederi 17,735 #26 Posted November 30, 2021 I bought a bag of the cheap paper filters found they were a loose fit with my fuel lines. Many of the Knock offs have a 6mm nipple for 6mm fuel line the rest of the world uses. 6 mm is .23622" so your .25" fuel line is a loose fit... 4 Share this post Link to post Share on other sites
squonk 41,083 #27 Posted November 30, 2021 1 hour ago, WHX?? said: Good post Joe Thanks... One thing the vintage car guys or the video doesn't mention unless I missed is it best to store things with a full or empty tank regardless if plastic or metal. Hi test gas or Squonky's canned fuel of course if full. Just out of curiosity Joe how much gas was in your tank. Thinking if it was more towards full it would push more against an air locked filter? Kinda like a gravity fed RJ or 'burb that gets starved for gas as the tank gets empty. With my 210 it didn't matter if the tank was full or not. After changing the filter I open the shutoff with a full tank and sat there waiting for the gas to fill the filter and Nuttin! Share this post Link to post Share on other sites
Handy Don 12,216 #28 Posted November 30, 2021 4 minutes ago, squonk said: With my 210 it didn't matter if the tank was full or not. After changing the filter I open the shutoff with a full tank and sat there waiting for the gas to fill the filter and Nuttin! Surface tension of the fuel-dampened filter element was greater than gravity on the gas in the tank (same concept as the straw picking up soda when you put your finger on the end). 1 Share this post Link to post Share on other sites
Jeff-C175 7,202 #29 Posted November 30, 2021 39 minutes ago, squonk said: waiting for the gas to fill the filter and Nuttin I shined a flashlight into the tank and couldn't see the shutoff valve. I did see the optional "internal grass fuel filter" though. Oddly, the engine ran pretty good but it did take some time to gitter primed if ya ran it dry. Share this post Link to post Share on other sites
Jeff-C175 7,202 #30 Posted November 30, 2021 36 minutes ago, Handy Don said: Surface tension of the fuel-dampened filter element was greater than gravity on the gas in the tank (same concept as the straw picking up soda when you put your finger on the end). Time to move to 3/8" fuel line! 1 Share this post Link to post Share on other sites
ebinmaine 67,460 #31 Posted November 30, 2021 I've had issues with both of my 16 horse Kohlers not wanting to keep prime. Luckily when the hood is raised the top of the fuel tank is easily accessed for the John @wallfish fuel tank inflation by mouth method. 😃 2 1 Share this post Link to post Share on other sites
ebinmaine 67,460 #32 Posted November 30, 2021 6 minutes ago, Jeff-C175 said: Time to move to 3/8" fuel line! Or a primer bulb 1 Share this post Link to post Share on other sites
Handy Don 12,216 #33 Posted November 30, 2021 The other day I realized that I cannot recall any of the machines I worked on in the 60's and 70's having fuel filters. They all had wire mesh screens, normally as part of the fuel tank or the outlet. Time to do some research on flow rates and pressure reductions in fuel filters. 3 Share this post Link to post Share on other sites
Jeff-C175 7,202 #34 Posted November 30, 2021 (edited) 27 minutes ago, ebinmaine said: inflation by mouth method. Made me think of a scene from the movie "AIRPLANE!" Edited November 30, 2021 by Jeff-C175 1 1 Share this post Link to post Share on other sites
squonk 41,083 #35 Posted November 30, 2021 7 minutes ago, Jeff-C175 said: Made me think of a scene from the movie "AIRPLANE!" Makes me think about building a tractor out of spare parts at the big show a few years back! Share this post Link to post Share on other sites
Snoopy11 5,714 #36 Posted November 30, 2021 1 hour ago, Handy Don said: Surface tension of the fuel-dampened filter element was greater than gravity on the gas in the tank (same concept as the straw picking up soda when you put your finger on the end). When I change fuel filters... I always disconnect the line at the carb and put a hand vacuum pump on it to pull the fuel through initially, rather than cranking the engine over dry... and waiting for it to come through the filter and lines. Don Share this post Link to post Share on other sites
roadapples 6,983 #37 Posted November 30, 2021 Used to have these problems before I went to electric pumps.... 2 Share this post Link to post Share on other sites
JoeM 7,873 #38 Posted November 30, 2021 Update, Tank 1/4 full. Took the filter and did the John Wallfish filter flow test. I first blew into it work wise and nothing would pass. I turned it around and reversed the process and air went through. Once again I turned it work wise and test again and now some air would go through. Disassembled the filter. Seems well made, has a lot of glue looking stuff holding the element in place. The paper element really looks to be pretty fine. (the dirt on the element is from the dirty pliers I used to pull on the paper) The media pleats seem very close together. Maybe the fuel swells the paper a bit and then it drys out and self blocks. IDK Installed a Kohler barrel type filter and it fired right up. Ran it dry, side note there was about a 1/4" of fuel left in filter when it shut off, and now waiting till tomorrow to turn on the fuel and try it. This motor always started on the first or second pull. Will see. 3 1 Share this post Link to post Share on other sites
