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Where to find Holley 1bbl #1940

S

Sylvia Tunaskas

New member
I have a 1986 LMC 1200 with a Ford 300 inline 6 (4.9L) industrial engine. I was told the carb is most likely the problem. The vehicle will not hold an idle (700 RPM) with out stalling. At 12-1500 RPM it will run, but below that it is not good. It works well if you are moving between 15-3000 RPM, but when you slow to 1200 or less it is a chore to keep running. The mechanic checked all the electrical, removed the carb and did a field cleaning and replaced some of the parts and gaskets. He also replaced the intake manifold gasket which greatly increased the vacuum. The carb will function down to 900 RPM with the manual choke at 3/4 closed (but rough). His diagnosis is most likely a new carb. I live near Seattle and the cat is near Stevens Pass. The mechanic does not have a source for the carb and when I go to the auto parts stores they look at me like I am crazy. I cannot find a reputable rebuild shop, let alone one that knows this carb.

The numbers on the back of the carb are: D9JL 9510 J
9170 2513

Can anyone point me in a direction that I can just get a new / remanufactured one in a box locally? I have also been told the composit floats have a tendecy to absorb water, and there are brass ones available. Any help or direction would be appreciated. Thanks
 
i have rebuilt 4 or 5 myself. I get the rebuild kit from NAPA. I use a harbor freight soda blaster to clean it and all the orifices real good, then blow it off with compressed air, then spray it down with carb cleaner.

You can find 1940's on ebay, but i would rebuild it. Some are Holley some are Motocraft, but they are the same carb.
 
for what its worth, i had the exact sam problem on my "homemade bombi" which runs a nissan 1.4 liter with a hitachi carburetor. carb was rebuilt and cleaned, ran fine for a while, then one of a sudden it just wouldnt run at less than 13-1500 rpm. removing the carb on that thing is a pain in the rear, and last ditch efford i did what i maybe shouldnt have done..... i took the fuel line off at the carb inlet, sprayed some carb cleaner into the carb and took an airhose to it at 30 or so psi while pumping he crap out of the throttle linkage (figuring i might blow out some gaskets or damage the carb in other ways)
reconnected fuel lines after that, and she now runs great. i guess i had some gunk from the fuel plug up the idle jet and she didnt get fuel.
just a thought. before doing the airhose thing, i did use a squirt bottle to squirt some fuel into the carb right at the moment she tried to die, and she picked up momentarly, so i knew she was starving for fuel at idle, even with the idle mixture screw turned wa out to the point where she should have been drowning.
good luck, and NAPA or LORDCO does great with rebuild kits, and here in canada i found most kits to be priced anywhere from $15 - $35 depending on carb.
 
Treadwell did a fantastic job rebuilding the carb for my 300/6. It ran great right out of the box.

My carb is some industrial model that no one had the kit for and a new one was $1000 !!!!
 
Please let me know how things go with your D9JL-9510. I just pulled one off my Bombardier SW48 and I either need to rebuild it myself or send it out.
 
I have used Treadwell carburetor in New York many times. They are excellent and the nicest people on the planet. 607-829-8321
 
Thanks for all the feedback. I spent most of last week trying to locate the holley #1940. I spoke with Treadwell in NY, Vans in IN, and Petersons in UT. My need may be a little different as I want to get an extra carb so if this happens again I have one to bolt on. Treadwell was very familiar with the carb, but was trying to locate a core to rebuild. Vans was researching options and I was waiting for a call back. Petersons had a possible from MN but it was $700 plus core and shipping. I am guessing the storms back east were a factor in getting timely replies.

I spoke with BCIS (carbsonly.com) in Burbank CA. They were wealth of information. Apparently there are different linkage configurations, flange measurements, and throttle body (?) diameters for the same Holley 1940. They walked me through their website and I was able to pass this on to our mechanic that does the onsite repairs for us. He identified the configuration I had on mine, based on the website pictures. (all views available)

On Friday they confirmed the availability of the core and hoped to have it ready to ship on Monday. I chose to have the stock nitrile floats replaced with the brass floats. (NAPA # CRB 2485) In our area moisture is an issue and I was told the nitrile can absorb moisture. I was quoted just shy of $350 including shipping to the Northwest. When I get the old carb off they quoted $189 plus shipping to rebuild it. From my conversations with BCIS I felt comfortable ordering from them. Hopefully when it is bolted on it will solve my issues. I will let you know.

Prior to narrowing it down to the carb, the mechanic tested the ignition system, replaced a faulty intake manifold gasket, checked PCV system and did a field cleaning / parts replacement of visible carb components and gaskets. It would run well above 1500 RPM and idle poorly at 1000 RPM with the manual choke set at 3/4. He has been working on theses machines for many years, and although he has not seen a carb this bad, he feels confident that there is not much more to check. If the carb is not the issue he would be surprised.

I will let you know what happens when we get the new carb installed. Hopefully I can go back to playing with the cat and not worrying about it. (at least for a while) Thanks again for the feedback.
 
The carb arrived on my doorstep this morning. I have a call into the mechanic and when he is next in the area I will meet him at the Cabin so he can install it. I will report the results.
 
My carb has been at Tredwell for a few weeks now. Glad I have a snowblower vs needing the SW-48. The order in which carbs are done at Tredwell is when he gets to them.
 
BUMP! Much has happened since my last post. While waiting for my mechanic to install the carb, we had 10' of snow. Went up and tried to get the cat out of the "hole", not successful! Had to dig down 4' to open the cab door. Being the cat would only idle at 1500 RPM, could not walk it out. Another 3' fell and this "old fart" was not on that good on the business of the shovel. Two neighbors helped with an 1800 and a 1200, and after 2 days of **** it walked out.

Went to install the new carb, and found out we had chosen the wrong configuration. (they warned us!!) The carb we ordered was a #1216. Turns out the linkage was correct but the throat diameter was incorrect. Based on their website, the proper application was a #1217 (large bore) with the #1216 linkage. When I returned home I packed the old carb and incorrectly ordered one and shipped them to carbsonly.com . (Burbank CA) Carlos was kind to me, even after I made the mistakes he warned me about. Eight day later I had the two carbs on my porch, rebuilt and ready to go. (with brass floats instead of the stock nitrile ones - moisture is an issue in out area.)

The weather has turned warm and rain / avalanches are being dealt with. I have no reason to believe the carbs will not work, but am waiting for the mechanic to install it. The snow will compress and hopefully the cat again will become a toy.

Carlos at carbsonly.com has been a pleasure to work with. Once the carb is installed I will end my rambling and report the results. Thanks for listening!
 
The mechanic has not been up to install the carb, and the snow is almost gone. Going up tomorrow to put one on and drive it to it's summer resting place. As I did not remove it, I am unsure as how the gaskets (2) to the intake manifold go on. My assumption is the spacer plate (thick one) goes on the intake manifold first. The thin gasket has the two mounting holes and one much smaller hole. Does it matter where the little hole is mounted with regards to the carb base plate?

Any help would be appreciated as I need it to start and move about half a mile. Thanks.
 
Just got back from finally installing the carb. It started right up and operated perfectly. I was able to move the cat to it's Summer resting place. I talked with Carlos at carbsonly.com about the gasket issue. When he rebuilds the carbs he also ships the gaskets with them. As he is not sure of the application for mounting he includes all possible gaskets for the intake manifold. (in my case 2) The usual gasket is the thick one. Sometimes the mounting studs are not long enough to accomodate the thick gasket so you have to use the thin one.

This ends my carb saga. BFIC / carbsonly.com is a pleasure to work with. Initially I ordered a complete remanufactured carb (just under $350 - for an extra) I then shipped my bad carb for them to rebuild (just under $200) I had them install the brass floats instead of the stock composite ones. I purposely installed the rebuilt one I took off my cat. It ran flawlessly!!

I can now give first hand knowledge of their craftsmanship and recommend them highly. With shipping (USPS flat rate priority mail) It was shipped to them, rebuilt, and shipped back to me in less than a week. (WA to CA and back to WA)
 
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