autolite 1100 help
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Laughing Gas
Joined: Mar 2002
Posts: 942
Likes: 338
From: Newton Illinois
autolite 1100 help
So I just got a 66F100 and it was running off a small can of fresh gas well enough to load and unload from the trailer.
It would not idle off choke so I decided to rebuild the carb.
The problem is that now everytime that I start up the carb floods over.
After several attempts to readjust the float level I finally took the top off the carb, turned it upside down and connected my radiator pressure tester to the fuel inlet and some soapy water shows that the needle valve will not hold any pressure with the weight of the float pressing against it,
I have checked and rechecked for dirt on the needle or seat, put the old needle valve back in and nothing works.
This model of the 1100 unfortunately has a non replaceable needle valve seat.
I also checked my fuel pressure and it is 6 psi.
Anyone got any ideas or do I need a new/different carb?
It would not idle off choke so I decided to rebuild the carb.
The problem is that now everytime that I start up the carb floods over.
After several attempts to readjust the float level I finally took the top off the carb, turned it upside down and connected my radiator pressure tester to the fuel inlet and some soapy water shows that the needle valve will not hold any pressure with the weight of the float pressing against it,
I have checked and rechecked for dirt on the needle or seat, put the old needle valve back in and nothing works.
This model of the 1100 unfortunately has a non replaceable needle valve seat.
I also checked my fuel pressure and it is 6 psi.
Anyone got any ideas or do I need a new/different carb?
Cargo Master
Joined: Apr 2001
Posts: 2,697
Likes: 46
From: Vancouver
I suggest you remove the float and examine it for a crack or pinhole that might not be visible to the eye. Clean the float with something abrasive, place it upside-down and allow it to dry. When it is dry, turn it right-side up and look for a leak to reveal itself.
Logistics Pro
Joined: May 2015
Posts: 4,463
Likes: 954
From: Tri Cities, TN
Sounds like you may actually have an 1101 carb. The weight of the float alone isn't enough to seal the seat. Make sure you have the correct needle the 1100 uses a different needle than the 1101. Look closely at the seat to make sure there aren't any pitted spots in it.
Here is a link to a parts page scroll down to see the different needles. Autolite 1100 and 1101 Carburetor Kits & Parts Catalog (carburetor-parts.com)
I looked at your other thread and that looks like a real clean truck.
Here is a link to a parts page scroll down to see the different needles. Autolite 1100 and 1101 Carburetor Kits & Parts Catalog (carburetor-parts.com)
I looked at your other thread and that looks like a real clean truck.
Thread Starter
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Laughing Gas
Joined: Mar 2002
Posts: 942
Likes: 338
From: Newton Illinois
Sounds like you may actually have an 1101 carb. The weight of the float alone isn't enough to seal the seat. Make sure you have the correct needle the 1100 uses a different needle than the 1101. Look closely at the seat to make sure there aren't any pitted spots in it.
Here is a link to a parts page scroll down to see the different needles. Autolite 1100 and 1101 Carburetor Kits & Parts Catalog (carburetor-parts.com)
I looked at your other thread and that looks like a real clean truck.
Here is a link to a parts page scroll down to see the different needles. Autolite 1100 and 1101 Carburetor Kits & Parts Catalog (carburetor-parts.com)
I looked at your other thread and that looks like a real clean truck.
I looked at the seat under magnification and it was pitted, I tried several methods to recondition the seat but finally gave up and ordered a rebuilt carb, Even when I put quite a lot of pressure on the needle valve it still leaked,
I had everything else done that the truck needed to get on the road and when my carb kit came i thought I would be driving in a couple hours or so but I will get there
Trailering
Joined: Aug 2017
Posts: 22
Likes: 1
From: Speedway, IN
I'm also in a battle with my Autolite 1100. I keep chasing down fuel leaks. Fixed the warped accelerator pump cover, now I have fuel flowing from under the bowl. I think it's coming from the throttle rod where it exits the body.
I think I'm done with this thing. Any suggestions on replacement carbs? I tried ordering a Autoline remanufactured through Rock Auto but then they claimed they couldn't find it in the warehouse. Christmas, you mentioned a Holley. Any specific model I should look for? Any other ideas?
Thanks in advance, sorry if I highjacked your thread Ishort.
E T
I think I'm done with this thing. Any suggestions on replacement carbs? I tried ordering a Autoline remanufactured through Rock Auto but then they claimed they couldn't find it in the warehouse. Christmas, you mentioned a Holley. Any specific model I should look for? Any other ideas?
Thanks in advance, sorry if I highjacked your thread Ishort.
E T
Thread Starter
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Laughing Gas
Joined: Mar 2002
Posts: 942
Likes: 338
From: Newton Illinois
My problem ended up being a pitted needle valve seat.
The way that I tested it was with the top off the carb I put a radiator pressure tester on the fuel inlet and even when putting quite a lot of pressure on the needle valve it still leaked.
What I ended up doing was buying a rebuilt from https://www.carburetorcenter.com/ on ebay, it was not the cheapest route but I did not want to put a Chinese built carb on it.
The way that I tested it was with the top off the carb I put a radiator pressure tester on the fuel inlet and even when putting quite a lot of pressure on the needle valve it still leaked.
What I ended up doing was buying a rebuilt from https://www.carburetorcenter.com/ on ebay, it was not the cheapest route but I did not want to put a Chinese built carb on it.
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Logistics Pro
Joined: May 2015
Posts: 4,463
Likes: 954
From: Tri Cities, TN
I'm also in a battle with my Autolite 1100. I keep chasing down fuel leaks. Fixed the warped accelerator pump cover, now I have fuel flowing from under the bowl. I think it's coming from the throttle rod where it exits the body.
I think I'm done with this thing. Any suggestions on replacement carbs? I tried ordering a Autoline remanufactured through Rock Auto but then they claimed they couldn't find it in the warehouse. Christmas, you mentioned a Holley. Any specific model I should look for? Any other ideas?
Thanks in advance, sorry if I highjacked your thread Ishort.
E T
I think I'm done with this thing. Any suggestions on replacement carbs? I tried ordering a Autoline remanufactured through Rock Auto but then they claimed they couldn't find it in the warehouse. Christmas, you mentioned a Holley. Any specific model I should look for? Any other ideas?
Thanks in advance, sorry if I highjacked your thread Ishort.
E T
Most any local parts house can get a remanufactured carburetor.
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Thread Starter
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Laughing Gas
Joined: Mar 2002
Posts: 942
Likes: 338
From: Newton Illinois
No one so far has mentioned which engine they have so we have to assume it is one that used a Load-O-Matic distributor. If so your choice in carburetors is limited to one that has a spark control valve in it. This is a replacement Holley 1904. Holley 1904 Universal Replacement Carburetor N1904 (carburetor-parts.com)
Most any local parts house can get a remanufactured carburetor.
Most any local parts house can get a remanufactured carburetor.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
The 200 is smaller than the 240/300 I-6's these trucks came with. The engine compartment will look larger with the puny 200 in it.
This is a gutless engine to install in an F100. Post a pic of it.
Logistics Pro
Joined: May 2015
Posts: 4,463
Likes: 954
From: Tri Cities, TN
You need to take a couple of pictures of your engine and post them. I agree with ND that would not be a good engine choice for a truck. I had a 1965 parts truck that someone had super rednecked a 250 I6 into. It had a rod sticking out of the block is how well that went.
Thread Starter
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Laughing Gas
Joined: Mar 2002
Posts: 942
Likes: 338
From: Newton Illinois
144/170/200 I-6's: The intake manifold is made as part of the cylinder head.
The 200 is smaller than the 240/300 I-6's these trucks came with. The engine compartment will look larger with the puny 200 in it.
This is a gutless engine to install in an F100. Post a pic of it.
The 200 is smaller than the 240/300 I-6's these trucks came with. The engine compartment will look larger with the puny 200 in it.
This is a gutless engine to install in an F100. Post a pic of it.
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