Stan50 60 #1 Posted 7 hours ago I remove fuel pump in my 312-8 (plastic one) because I noticed small fuel leak, where fuel pump is connected to engine block. There was only one red thin gasket on the pump (looks decent), Maybe I need another gasket ? something like that? tractor runs good, start excellent (I added primer bulb), fuel pump # 4755904 for my engine but of course right now there is different # 4739367 Share this post Link to post Share on other sites
WHX?? 53,939 #2 Posted 7 hours ago (edited) 8 minutes ago, Stan50 said: I noticed small fuel leak, where fuel pump is connected to engine block. If you have a fuel leak there the pump diaphragm is shot. Drain your engine oil and check for presence of gas. With a plastic pump your best off just replacing it. They are readily available and cheap but sometimes quality questionable. Plastic pumps are not worth rebuilding. There are many threads on them here. One of many offerings here. Edited 7 hours ago by WHX?? 2 2 Share this post Link to post Share on other sites
953 nut 63,648 #3 Posted 7 hours ago This would be a good opportunity to go with an electric pump. 5 2 Share this post Link to post Share on other sites
sqrlgtr 1,850 #4 Posted 6 hours ago 17 minutes ago, WHX?? said: If you have a fuel leak there the pump diaphragm is shot. Drain your engine oil and check for presence of gas. Definitely check for fuel in gas. 6 minutes ago, 953 nut said: This would be a good opportunity to go with an electric pump. I always thought the tractors with the fuel tank under seat were great candidates for electric fuel pumps and would go that route before trying one of the cheap plastic pumps. IDK what the name brand mechainicals go for but remember thinking there was not much difference $$$ wise in converting to electric or maybe even cheaper. 2 Share this post Link to post Share on other sites
ri702bill 11,029 #5 Posted 4 hours ago 2 hours ago, sqrlgtr said: the name brand mechainicals Facet. Has to be the low pressure, 1 to 3 lbs. or so, version. Share this post Link to post Share on other sites
Stan50 60 #6 Posted 4 hours ago 1 hour ago, WHX?? said: If you have a fuel leak there the pump diaphragm is shot. Drain your engine oil and check for presence of gas. With a plastic pump your best off just replacing it. They are readily available and cheap but sometimes quality questionable. Plastic pumps are not worth rebuilding. There are many threads on them here. One of many offerings here. Yes, small amount of fuel is sipping at the bottom of fuel pump. I bought the tractor recently and slowly going tru all important components. I'd like to be ready for mowing season :). I read some forum posts about electric fuel pump and it is probably way to go. I found that CarBolo is much appreciated here so I 'II go that direction. 1 hour ago, sqrlgtr said: Definitely check for fuel in gas. I recently changed oil, right after I put hands on the tractor, so oil looks like new. Old one was dirty and somewhat thin so maybe you're right. 1 Share this post Link to post Share on other sites
Stan50 60 #7 Posted 4 hours ago 1 minute ago, ri702bill said: Facet. Has to be the low pressure, 1 to 3 lbs. or so, version. yeah, I read many good reviews about Facet and CarBolo and I'll go with CarBolo (cheaper :)). Share this post Link to post Share on other sites
WHX?? 53,939 #8 Posted 4 hours ago (edited) What tractor are you working on Stan? I like that pump. If you go electric you can take off the primer bulb. Check out the other ones on that site he posted guys. Most notably the shipping. Am I reading that right??? Edited 4 hours ago by WHX?? 1 Share this post Link to post Share on other sites
Stan50 60 #9 Posted 4 hours ago One more question, it is better fabricate block off cover plate or just put old fuel pump and redirect gas lines in either case? Share this post Link to post Share on other sites
WHX?? 53,939 #10 Posted 4 hours ago Most guys are gonna say block it off. Ther is a cover made to do it or fab one. If you need a gasket I have a ton of them. 2 Share this post Link to post Share on other sites
sqrlgtr 1,850 #11 Posted 4 hours ago 5 minutes ago, Stan50 said: One more question, it is better fabricate block off cover plate or just put old fuel pump and redirect gas lines in either case? I would think a block off plate would be better but have seen them both ways. I belive you can even get a factory block off plate but IDK what the cost would be. 2 Share this post Link to post Share on other sites
Stan50 60 #12 Posted 4 hours ago Just now, WHX?? said: What tractor are you working on Stan? I like that pump. Check out the other ones on that site he posted guys. Most notably the shipping. Am I reading that right??? 1985 312-8 my original post : I live in Poland so i have to order parts in advance from US or I found some minor parts here ( ignition switch, spark plug etc) or (like that CarBolo) on Chinese website (fastest route). Lots of planning with manuals but in short time I will know every part and every part number 1 1 Share this post Link to post Share on other sites
sqrlgtr 1,850 #13 Posted 4 hours ago @WHX?? beat me too it Share this post Link to post Share on other sites
Stan50 60 #14 Posted 4 hours ago 1 minute ago, WHX?? said: Most guys are gonna say block it off. Ther is a cover made to do it or fab one. If you need a gasket I have a ton of them. I saw 1/8 metal sheet laying around in my garage so I'm going fab one. I suppose I need gasket too? but I cut it off kevlar gasket sheet 2 1 Share this post Link to post Share on other sites
Treepep 977 #15 Posted 2 hours ago 4 hours ago, sqrlgtr said: 4 hours ago, WHX?? said: If you have a fuel leak there the pump diaphragm is shot. Drain your engine oil and check for presence of gas. Definitely check for fuel in oil. fixed sir 1 Share this post Link to post Share on other sites
sqrlgtr 1,850 #16 Posted 1 hour ago 36 minutes ago, Treepep said: 4 hours ago, sqrlgtr said: 5 hours ago, WHX?? said: If you have a fuel leak there the pump diaphragm is shot. Drain your engine oil and check for presence of gas. Definitely check for fuel in oil. fixed sir Thanks took me a minute to see what I had done. Share this post Link to post Share on other sites
Ed Kennell 44,158 #17 Posted 1 hour ago 5 hours ago, 953 nut said: This would be a good opportunity to go with an electric pump. No need for primer bulb and no risk of fuel leaking into the crankcase. Just keep fuel in the tank. Electric pumps die quick when pumping air. 1 Share this post Link to post Share on other sites
Achto 30,533 #18 Posted 57 minutes ago 3 hours ago, Stan50 said: I read many good reviews about Facet and CarBolo and I'll go with CarBolo I'm running this pump on a couple of my tractors. One of which is my pulling tractor. Have had good luck with them. https://www.amazon.com/Electric-Universal-Pressure-Transfer-Carburetor/dp/B08PY7V2MM/ref=sr_1_1_sspa The jungle site has the CarBole at a lower price than the link you posted. https://www.amazon.com/CarBole-Universal-2-3-5P-S-I-Operating-Self-Priming/dp/B01IR6BNKY/ref=sr_1_6_sspa 1 Share this post Link to post Share on other sites
Stan50 60 #19 Posted 2 minutes ago 49 minutes ago, Achto said: I'm running this pump on a couple of my tractors. One of which is my pulling tractor. Have had good luck with them. https://www.amazon.com/Electric-Universal-Pressure-Transfer-Carburetor/dp/B08PY7V2MM/ref=sr_1_1_sspa I found this one locally HEP 02A, looks the same, but manual says 3-6 psi, price is good... Share this post Link to post Share on other sites
