Choomanfoo 0 #1 Posted November 19, 2019 My fuel pump is filling my crank case full of gas. I can not seen to find a replacement that matches. Can I switch it to an electronic fuel pump? Share this post Link to post Share on other sites
lynnmor 7,442 #2 Posted November 20, 2019 You can find universal vacuum fuel pumps or install an electric one. If you could describe the engine you have or a wider photo might help. Someone on here might be able to give you a source of repair parts for the current pump. One like this might work. What ever you do, change the oil immediately and don't run it till the pump problem is solved. Share this post Link to post Share on other sites
953 nut 56,340 #3 Posted November 20, 2019 Many of us have switched to electric fuel pumps, easy starting and no gas going into the crank case. Ant low pressure electric fuel pump will be fine. Attach the electrical feed to the "A" terminal on your ignition switch. 2 Share this post Link to post Share on other sites
Pullstart 63,269 #4 Posted November 20, 2019 from a couple three hours west south west of you! My local Parts Plus store has a small engine section with vacuum operated pumps readily available. With that said, I bought this $9.84 electric cheapie on Amazon and have had good results with the same one on my 22 hp wood splitter. As it’s been mentioned... for that price, I don’t mind if I need to replace it in 3 years or so! 1 Share this post Link to post Share on other sites
The Tuul Crib 7,338 #5 Posted November 20, 2019 to I have never been a real big fan of the crank case fuel pumps just for that reason. Releasing fuel into the crank case is never a good thing. Electric fuel pumps are a whole lot better and make for a quicker starting especially in the cold . 1 Share this post Link to post Share on other sites
pacer 3,174 #6 Posted November 20, 2019 Okay, I speak from experience here -- I have the Onan B43M/B48M which has that exact pump. I was having problems with the engine running erratically, seemingly fuel related. Not knowing the history of the engine I rebuilt the carb with no help so I next got an electric pump to try. I first used one of the round ones and it flooded the carb badly. I next tried one of the square ones -- same thing! I went back to the vacuum pump and the flooding stopped. Obviously the pressure of the electrics was too great for the needle/seat. I had done a rebuild on the carb so it had a new needle/seat.... I did not know what the pressure on the round ones was, but had used that type on Kohler engs with no problem. I was pretty sure the square one was the 4-5psi, but it still was too much. At that time I saw the vacuum types on the bay relatively inexpensive Share this post Link to post Share on other sites
ClassicTractorProfessor 5,356 #7 Posted November 20, 2019 I’m glad this came up...my C125 is always hard starting after it sits for a few days...wanting to upgrade to an electric pump...for you guys running them what pressure pump are you using. I found one that’s 2.5-4 psi...just worried about running too much pressure to the carb Share this post Link to post Share on other sites
Choomanfoo 0 #8 Posted November 20, 2019 Thank you all for the help, hope to solve this issue soon. Share this post Link to post Share on other sites
pfrederi 18,061 #9 Posted November 20, 2019 If you want to go electric I use facet posiflow pumps made in USA cost more but I have never had an issue. Had one of the cheapies die after only a few hours. I use the 60245 1.5-4 PSI mo problems some may prefer lower pressure then use 60304 1-2 psi https://www.aircraftspruce.com/catalog/eppages/solidstatepump.php 2 Share this post Link to post Share on other sites
CODYDOG 0 #10 Posted December 16, 2019 I have a 1966 , 856 Wheelhorse with a K181 engine. It has the vacuum fuel pump. It has in holes in the diaphragm and I am getting gas in my crankcase also. Does anyone know where I can buy just the diaphragm? Thanks for the help. Share this post Link to post Share on other sites
rmaynard 15,750 #11 Posted December 17, 2019 Contact member @buckrancher Share this post Link to post Share on other sites
