ebinmaine 67,592 #26 Posted February 27, 2022 1 hour ago, squonk said: # AR102. 12 V + to terminal #4. Case is grounded. Pump wires to terminals 1&3 Nothing on number three? What does that one do? Share this post Link to post Share on other sites
squonk 41,150 #27 Posted February 27, 2022 (edited) 14 minutes ago, ebinmaine said: Nothing on number three? What does that one do? Sorry Eric I goofed. (It's hell to get old! ) 12V+ from the battery to terminal #1 Power from the key switch to terminal # 4. Pump power wire to terminal # 3. At rest the relay contact is at # 2 which means if terminal 1 is hot then terminal # 2 is hot also with no power being applied to terminal #4 (Coil posititve) When you were to turn the key on Power is applied to terminal # 4. The coil energizes and creates a magnetic field. This pulls the contact from the # 2 terminal and applies it to # 3. The fuel pump positive wire is connected to # 3 and power now flows to the pump. No wire is attached to the #2 terminal. Edited February 27, 2022 by squonk 1 Share this post Link to post Share on other sites
dmoore 824 #28 Posted February 27, 2022 On 2/26/2022 at 10:26 AM, peter lena said: @dmoore put a fuel check valve VERTICALLY between that fuel pump and carb , no drain back or evaporation , you are talking about a 6' vertical fuel run , very simple . have that set up on 3 kohler magnum engines , instant starts , minimal choke . works every time . EVIL ENERGY FUEL CHECK VALVES , 5/16 SIZE . FITS SNUGLY into a 1/4" clear vinyl fuel line , use dark green spring clamps . make up the swap line piece before , installation . just my own experience , to a regular problem , pete Pete could you provide a pic of your check valve? I am trying to wrap my head around how it would keep the fuel from evaporating out of the carb. Thanks! Share this post Link to post Share on other sites
ebinmaine 67,592 #29 Posted February 27, 2022 1 hour ago, squonk said: It's hell to get old! No worries brother man I'm following right there too.... 7 minutes ago, dmoore said: evaporating How long is this taking? We leave machines dormant as much as a year here and they start right up. Share this post Link to post Share on other sites
pfrederi 17,741 #30 Posted February 27, 2022 24 minutes ago, dmoore said: Pete could you provide a pic of your check valve? I am trying to wrap my head around how it would keep the fuel from evaporating out of the carb. Thanks! Holds fuel in the line right up to the float needle valve. Even if all the gas in the bowl evaporates (and that would take some time) the first few revolutions of eh engine the fuel pump will push it into the bowl and enough to be sucked up the main needle 3 Share this post Link to post Share on other sites
dmoore 824 #31 Posted February 27, 2022 31 minutes ago, ebinmaine said: No worries brother man I'm following right there too.... How long is this taking? We leave machines dormant as much as a year here and they start right up. Well I can tell you less than a week and its gone. I have to crank it for 5 second intervals 3 times. The gas formulation today and carburetors do not get along. I have the same problem in ALL my carb'd vehicles. I only use non-ethanol 91 octane in these vehicles. If your cranking up engines that have sat for a year count your blessings! 1 Share this post Link to post Share on other sites
dmoore 824 #32 Posted February 27, 2022 1 hour ago, pfrederi said: Holds fuel in the line right up to the float needle valve. Even if all the gas in the bowl evaporates (and that would take some time) the first few revolutions of eh engine the fuel pump will push it into the bowl and enough to be sucked up the main needle Paul that makes good sense. Is there a certain part number you use? Share this post Link to post Share on other sites
dmoore 824 #33 Posted February 27, 2022 The electric fuel pump idea would be the answer for sure but I just don't want another system to fail eventually and I like the simple, original look. Same reason I haven't installed one on say my #1 64 Plymouth Sport Fury convertible. Share this post Link to post Share on other sites
ebinmaine 67,592 #34 Posted February 27, 2022 24 minutes ago, dmoore said: Well I can tell you less than a week and its gone. I have to crank it for 5 second intervals 3 times. The gas formulation today and carburetors do not get along. I have the same problem in ALL my carb'd vehicles. I only use non-ethanol 91 octane in these vehicles. If your cranking up engines that have sat for a year count your blessings! Yeah see that's why I ask... Gas just is not evaporated from a tractor in a week or a month. You're losing it to drain back. Check valve would help. Primer bulb would help. 1 Share this post Link to post Share on other sites
pfrederi 17,741 #35 Posted February 27, 2022 OK I am getting a bit confused the Original poster had an Electro 12. Drain back is not an issue no check valves needed the gas tank is above the carb. Heck if you keep the tank at least half full you do not need a fuel pump... 4 Share this post Link to post Share on other sites
ebinmaine 67,592 #36 Posted February 27, 2022 7 hours ago, squonk said: Sorry Eric I goofed. (It's hell to get old! ) 12V+ from the battery to terminal #1 Power from the key switch to terminal # 4. Pump power wire to terminal # 3. At rest the relay contact is at # 2 which means if terminal 1 is hot then terminal # 2 is hot also with no power being applied to terminal #4 (Coil posititve) When you were to turn the key on Power is applied to terminal # 4. The coil energizes and creates a magnetic field. This pulls the contact from the # 2 terminal and applies it to # 3. The fuel pump positive wire is connected to # 3 and power now flows to the pump. No wire is attached to the #2 terminal. Thanks for that Mike. Ordered. 1 Share this post Link to post Share on other sites
dmoore 824 #37 Posted February 28, 2022 7 hours ago, ebinmaine said: Yeah see that's why I ask... Gas just is not evaporated from a tractor in a week or a month. You're losing it to drain back. Check valve would help. Primer bulb would help. Oh yes it does. I've known this for years. No fuel in the idle circuit no start. Like I said, the Carter AFB on my 64 Sport Fury 426 is bone dry after two weeks. The only good thing is while cranking the engine has oil pressure before it starts. The down side is more wear & tear on starter & the $400.00 battery. Share this post Link to post Share on other sites
dmoore 824 #38 Posted February 28, 2022 It's the gas formulation today. This was NEVER a problem years ago. Never. 1 Share this post Link to post Share on other sites
ebinmaine 67,592 #39 Posted February 28, 2022 1 minute ago, dmoore said: It's the gas formulation today. This was NEVER a problem years ago. Never. It's interesting that we don't have that issue here in Maine. I do know for a fact that states have different laws for fuel formulas. Perhaps whatever we get isn't prone to evaporation. 1 Share this post Link to post Share on other sites
dmoore 824 #40 Posted February 28, 2022 Consider yourself lucky EB😀 1 Share this post Link to post Share on other sites
ebinmaine 67,592 #41 Posted February 28, 2022 Just now, dmoore said: Consider yourself lucky EB😀 Oh we do ! 1 Share this post Link to post Share on other sites
seven 202 #42 Posted March 7, 2022 I would be pissed after 53 years it's leaking .dam junk they built back then 2 Share this post Link to post Share on other sites
ebinmaine 67,592 #43 Posted March 7, 2022 5 hours ago, seven said: I would be pissed after 53 years it's leaking .dam junk they built back then What's to be for? 😂 I'm 2 years younger than that and I'm already falling apart. I'd say the pump got better service time than I. 2 Share this post Link to post Share on other sites
