Questions & Answers
Questions: I am replacing a duel action fuel pump and I am hooking it up the same way it was put on. I know this isn’t the best method, but I’m military and it’s how I’m wired to do things, lol. Well, upon reconnecting the lines I noticed “in” on the pump and that’s where the previous owner had a line going towards the carburetor. Isn’t the “in” indicator where you should install the line from the gas tank? Also, what if I did switch the lines and there is no suction? Thank you, Geoie
Question By: Geoie on Jan 14 2021 10:01 PM
Send some photos of how your installing to email@example.com and we can help out.
Answer By: Willys Jeep Parts Tech on Jan 18 2021 6:08 AM
Questions: Should the lever on a new fuel pump move freely, the one I purchased does not move up and down at all
Question By: Mike on Dec 27 2020 3:00 PM
No, they are very hard to actuate by hand. We have to put them in a vise and use a dowel stick to get leverage.
Answer By: Willys Jeep Parts Tech on Dec 28 2020 6:08 AM
Questions: If I have a dual action fuel pump for my 63, CJ5, but am nit currently using the vacuum wipers, can I cap the outlets somehow? Also, is the spacer required?
Question By: Craig on Oct 18 2020 6:28 PM
Dont cap but you would want to port them together. Use a spacer if you have high fuel pressure.
Answer By: Willys Jeep Parts Tech on Oct 20 2020 5:37 AM
Questions: I have a dual action pump with a glass bowl on my 1957 CJ5 do you have any of those for sale? or are these the same and/or interchangeable? thanks
Question By: Tim Harpin on Oct 14 2020 6:40 AM
This is the same pump, they just make it with a metal bowl. Its the only way they are available anymore.
Answer By: Willys Jeep Parts Tech on Oct 14 2020 5:20 AM
Questions: Has anyone tried to mod this pump to work on a 230 OHC ?
Question By: mike brady on Sep 30 2020 4:21 PM
Sorry, I don't believe this will work for the 6-230 OHC engine.
Answer By: Willys Jeep Parts Tech on Sep 30 2020 9:49 AM
Questions: I have a 1960 cj5. How do I know if I have a 134F engine.
Question By: Mike Miller on Sep 7 2020 10:22 PM
If the spark plugs are on the side of the motor, at a 45 degree angle then you have a f-head motor. Thanks
Answer By: Willys Jeep Parts Tech on Sep 8 2020 3:52 AM
Questions: What is the difference between the 8329807 spacer for MFUELPUMP, and the 866236 spacer for this pump? Will the 8329807 spacer work on this pump? Thanks
Question By: Ted on Jul 20 2020 5:49 PM
The military pump spacers are much thicker.
Answer By: Willys Jeep Parts Tech on Jul 20 2020 11:13 AM
Questions: Why is the 38A1 not listed..same engine.
Question By: charles on Apr 19 2020 5:04 AM
This is for civilian Jeeps. The correct pump for the A1 is: https://www.kaiserwillys.com/factory-rebuilt-fuel-pump-dual-action-fits-50-62-m38-m38a1 Thanks
Answer By: Willys Jeep Parts Tech on Apr 19 2020 2:23 PM
Questions: Hey! This pump brings two vacuum outputs, is one for each wiper motor? TY
Question By: Andres on Jan 11 2020 2:24 PM
No, only one line goes to your vacuum wiper motor.
Answer By: Willys Jeep Parts Tech on Jan 13 2020 5:30 AM
Questions: is this pomp good for a jeep M38A1 from 1955 ? best regards
Question By: Antoine de Bournazel on Dec 26 2019 2:16 PM
Yes, but you would have to re-run your lines to it and possibly rotate the diaphragm for front engine plate clearance.
Answer By: Willys Jeep Parts Tech on Dec 26 2019 8:18 AM
Questions: Does the pump have an internal pressure regulator that limits the output to about 3 psig? How can the pump output pressure be verified?
Question By: Robert Stevenson on Dec 2 2019 7:33 PM
There is no separate regulator per se But the pump is made for the motor and will be correct. The throw of the arm and diaphragm are what put out the correct psi.
Answer By: Willys Jeep Parts Tech on Dec 2 2019 11:46 AM
Questions: On my 65 CJ5 which port on vacuum pump pulls vacuum and which is exhaust relative to proximity to engine? If the vacuum connects to wipers, what does the exhaust port connected to?
Question By: Robert Stevenson on Dec 2 2019 7:29 PM
Youll feel the push / pull on the vacuum. Typically its ported thru your pcv lines or even a vacuum advance on your distributor.
Answer By: Willys Jeep Parts Tech on Dec 2 2019 11:51 AM
Questions: When used with an M38A1, will this pump require the spacer used on the original military style duel fuel pumps? I believe this is Item # 8329708 in your catalog.
Question By: Bill S. on Oct 20 2019 10:06 PM
866236 is the spacer I would use with this pump.
Answer By: Willys Jeep Parts Tech on Oct 21 2019 5:33 AM
Questions: My 62 CJ5, 4-134 F head, currently has this fuel pump installed. The previous owner(s) plugged off the two vacuum ports. The jeep has electric wipers. I'm wanting to replace the fuel pump and was curious if the single action pump could be used now?
Question By: Lyle Brown on Sep 29 2018 2:29 PM
Yes, a single action can be used. 119238 - but you may have to rotate the diaphragm a bit for clearance.
Answer By: Willys Jeep Parts Tech on Oct 1 2018 11:48 AM
Questions: witch are the fuel lines on a new fuel pump for 1955 m38 a1 jeep i have two copper lines on bottom that appears to be vaccumn lines i think can somebody help me they did not send any dirrections for dummys
Question By: Darin Benedict on Jan 27 2018 2:37 PM
Please email firstname.lastname@example.org so i can see which fuel pump you currently have and help out.
Answer By: Willys Jeep Parts Tech on Jan 29 2018 5:58 AM
Questions: My CJ3A came with this pump on it and has worked for years. Can I replace it with this again or should I use the 119729. My motor is the 4-134 L
Question By: Angelo Saragosa on Oct 3 2017 12:02 AM
Either will work just fine on the 4-134 engine.
Answer By: Willys Jeep Parts Tech on Oct 3 2017 5:43 AM
Questions: I have a 54 CJ-3B, I appears to have a vacuum for wipers on old pump.I would like to keep original do you sell a rebuild kit? The only numbers i can find of the pump is 4080 on the mounting flange.
Question By: andrew on Aug 19 2017 10:23 PM
Rebuild kits are not available. We have complete pumps available new.
Answer By: Willys Jeep Parts Tech on Aug 21 2017 5:40 AM
Questions: My wipers (at least the driver's side)is now electric. I have a 57 CJ5 so the old pump had no wiper lines, what do I do with the lines on this dual action pump?
Question By: Mitch Hatch on Aug 2 2017 11:56 PM
You would need to port them together with a hose so its a loop.
Answer By: Willys Jeep Parts Tech on Aug 3 2017 5:50 AM
Questions: On this fuel pump do both vacuum line out ports provide vacuum and does it matter which side is used for either vacuum line? Thanks in advance - Rick Installation diagram available ?
Question By: Rick Hoffman on Jun 15 2017 1:16 PM
The vacuum is the larger side. Yes on the vacuum - it is a suck/blow. So don't plug them off or the pump wont work properly. You can either connect them properly to the vehicle, leave them open (not recommended due to dirt getting in there. Or run a hose between two.
Answer By: Willys Jeep Parts Tech on Jun 15 2017 7:53 AM
Questions: I have a 1952 m38 with this pump on it, is that correct?
Question By: william on Jun 6 2017 1:20 PM
MFUELPUMP is what they originally used but this one will work if you re-run your lines to it.
Answer By: Willys Jeep Parts Tech on Jun 6 2017 6:27 AM
Questions: This comes withe the gasket ?
Question By: Scott on Apr 28 2017 12:30 AM
Yes, that is correct.
Answer By: Willys Jeep Parts Tech on Apr 28 2017 6:02 AM
Questions: Can the glass bowl from my old two stage pump be installed on this new pump?
Question By: Ken B on Mar 31 2017 2:37 PM
No sorry, I don't believe they are interchangeable.
Answer By: Willys Jeep Parts Tech on Mar 31 2017 9:12 AM
Questions: This should work but I have a 58 FC 150 with the 4-134, this will fit correct? Curious due to the proximity of the fuel pump to the motor mount on an FC 150 along with the amount of connectors that tie into the fuel pump.
Question By: Flo Kinzel on Sep 30 2016 1:20 PM
Yes, this pump will work for your FC-150.
Answer By: Willys Jeep Parts Tech on Oct 3 2016 5:40 AM
Questions: I have a 1957 willys cj5, it has a dual action fuel pump with a glass bowl. I can't seem to find one like it anywhere...will the 120206 fuel pump work? I do need the vacuum for the PCV system, but am not going to need the vacuum for the wipers...what do I do with the port for the vacuum hose for the wipers if this pump will work?
Question By: Lana on Aug 25 2016 11:57 PM
120206 would be the proper pump for you and your original lines would hook up properly to it for your CJ-5.
Answer By: Willys Jeep Parts Tech on Aug 29 2016 5:43 AM
Questions: Hi, Will this fit a 1961 M38A1
Question By: chris on Aug 25 2016 9:14 AM
Yes, but you may have to rotate the diaphragm for front engine mount plate clearance and re-run your lines. It is correct though for the 4-134 engine.
Answer By: Willys Jeep Parts Tech on Aug 25 2016 6:17 AM
Questions: Own 134 1950 Jeepster with overhead intake valve. Need new fuel pump. Ours has glass bowl. Can I use my glass bowl on your fuel pump.
Question By: Jon peele on Jul 24 2016 2:12 PM
No your old glass wouldn't work. This pump will be correct for you.
Answer By: Willys Jeep parts tech on Jul 25 2016 5:57 AM
Questions: Is it proper to work with unleaded gasoline?
Question By: Anonymous on May 17 2015 12:00 AM
Yes, this will work with modern day fuels.
Answer By: Willys Tech on May 18 2015 12:00 AM
Questions: When I removed the old glass bowl fuel pump from my 1963 CJ5, there was a metal spacer between the engine and the old fuel pump. Do I need to use this with the new pump?
Question By: Anonymous on Aug 25 2014 12:00 AM
Yes you will want to reinstall. Our part number for it is: 886236
Answer By: Willys Tech on Aug 25 2014 12:00 AM
Questions: I'm not running any vacuum off of the pump. Can I replace this pump with pump #119240 ? It's the new pump w/ primer
Question By: Mike on Aug 5 2014 12:00 AM
Yes but on the 4-134 F engine you may have to rotate the diaphram to clear the front engine mounting plate.
Answer By: Willys Tech on Aug 5 2014 12:00 AM
Questions: Do you have a fuel pump for a M38A1? And if so, what is the part number.
Question By: Jim B on Jun 12 2013 12:00 AM
MFUELPUMP is the part you need. We have to have your core in on the M38 and M38A1.
Answer By: Willys Tech on Jun 12 2013 12:00 AM
Questions: Is there a way just to order the insides of this pump? Such as the Diaphragms and gaskets.
Question By: Cory on May 7 2013 12:00 AM
Sorry we only have complete fuel pumps.
Answer By: Willys Tech on May 8 2013 12:00 AM
Questions: How would this plumb in a 1960 CJ5 with vaccum wipers. One tube must go to the wipers and the other goes where?............Michael
Question By: Anonymous on May 18 2012 12:00 AM
The small bowl is for the fuel. There is a in/out outlet. The large bowl is for the vacuum.
Answer By: Willys Tech on May 18 2012 12:00 AM
Questions: Does this pump have the pressure fitting for the PCV system on it? The pump I have is a AC 4032 it is the glass bowl type it also has a fitting for the vacuum wipers and the PCV system. Will this pump work? And does this pump have a sediment bowl with a screen?
Question By: Eric on Apr 28 2012 12:00 AM
This is a complete fuel pump that operates both the fuel and vacuum lines for your wipers. Yes it does have a screen for sediment in it.
Answer By: Willys Tech on Apr 30 2012 12:00 AM