Help Identify this Carb and quick question...
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Junior User
Joined: Aug 2011
Posts: 95
Likes: 0
From: Oakland, CA
Help Identify this Carb and quick question...
Below are a few pics of My carburetor. It's on a 360. Can you tell me what it is? I'm trying to find the model number but am not sure exactly where to look. I think it's a Holley 1848 based on pictures I've seen online, but I can't be sure.
I'm getting a little pool of gas on the manifold. In the close up photo of the carburetor, on the lower right corner, just below the screw, you'll see shiney gas on top of the black gasket. With the engine off, I wipe that off and it'll seep there again. Perhaps that's the leak. Can you guys confirm?
THe truck runs well when warm. When cold, it tends to hesitate when I accelerate under load. If the truck is parked the engine revs fine. When I put it in drive it hesitates and I have to feather the pedal to keep it on. THe accelerator pump seems to work fine, I get a good stream of gas as soon as I move the throttle.
Any way, here are my questions:
1. Is this the best carb for this engine?
2. Is that leak causing the hesitations under load when cold?
3. Is that leak easy to fix?
4. What model is this carb?
I'm getting a little pool of gas on the manifold. In the close up photo of the carburetor, on the lower right corner, just below the screw, you'll see shiney gas on top of the black gasket. With the engine off, I wipe that off and it'll seep there again. Perhaps that's the leak. Can you guys confirm?
THe truck runs well when warm. When cold, it tends to hesitate when I accelerate under load. If the truck is parked the engine revs fine. When I put it in drive it hesitates and I have to feather the pedal to keep it on. THe accelerator pump seems to work fine, I get a good stream of gas as soon as I move the throttle.
Any way, here are my questions:
1. Is this the best carb for this engine?
2. Is that leak causing the hesitations under load when cold?
3. Is that leak easy to fix?
4. What model is this carb?
Logistics Pro
Joined: Jan 2011
Posts: 4,762
Likes: 54
From: Antelope Valley ,CA
carb # is stamped on the choke housing front right facing carb . looks like 600cfm google that #
i think your leak is form the accelerator pump (pic 3) i see wetness there . i think you can buy just the accelerator pump . if not just get a rebuild kit
i think your leak is form the accelerator pump (pic 3) i see wetness there . i think you can buy just the accelerator pump . if not just get a rebuild kit
FTE Legend
Joined: Sep 2003
Posts: 53,968
Likes: 2,390
From: NY and VA
Ditto what Mikes said. Pump is avail separately. Make sure the cover is flat by rubbing it across some sandpaper on a flat surface, 220 grit works ok
Last edited by GLR; Nov 15, 2011 at 12:35 PM. Reason: info
Thread Starter
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Junior User
Joined: Aug 2011
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From: Oakland, CA
THanks guys. What do I do with that open port? Is there supposed to be a vacuum hose attached there?
As for the carb number, is that the tiny little etching barely visible in the pic? Is that the model number? I'll take a look tonight, when I get home.
As for the carb number, is that the tiny little etching barely visible in the pic? Is that the model number? I'll take a look tonight, when I get home.
Post Fiend
Joined: Dec 2007
Posts: 8,521
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From: Lost
Looks like a float bowl vent. Don't cap it, as that can lead to flooding issues.
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FTE Legend
Joined: Sep 2003
Posts: 53,968
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From: NY and VA
Vent as Rogue says. I've seen them capped and hooked to air filter. Is there one in the rear ? Those two tubes near the center of the carb should lead to the floats as vents also.
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Laughing Gas
Joined: Aug 2010
Posts: 979
Likes: 40
From: Colorado Springs CO
BTW, what you have there looks like a standard Holley 600 CFM with electric choke (maybe a 9834 or 80457) but the front bowl is off something else. It should work fine for your truck if everything is set up properly.
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Junior User
Joined: Aug 2011
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From: Oakland, CA
Thanks, Doug. And everyone else who chimed in. I don't know all the parts of the carburetor, so I don't know what the bowl is. I took it into a mechanic today to have it looked at and possibly repaired. He mentioned he couldn't get a hold of a carburetor guy since not too many people deal with them these days. I'm gonna call someone else tomorrow.
Laughing Gas
Joined: Aug 2010
Posts: 979
Likes: 40
From: Colorado Springs CO
Thanks, Doug. And everyone else who chimed in. I don't know all the parts of the carburetor, so I don't know what the bowl is. I took it into a mechanic today to have it looked at and possibly repaired. He mentioned he couldn't get a hold of a carburetor guy since not too many people deal with them these days. I'm gonna call someone else tomorrow.
Holleys are pretty simple to work on, and there's lots of info about them online. You should try to rebuild it yourself.
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Junior User
Joined: Aug 2011
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From: Oakland, CA
Thanks again, Doug. I might go ahead and do that, especially with your encouragement. It's still at the shop. The truck has a charging system malfunction and they can't figure it out. I'm starting to think they have no idea how to deal with 45 y/o technology.
FTE Legend
Joined: Sep 2003
Posts: 53,968
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From: NY and VA
If you do decide to re-build the carb yourself.(the accelerator pump is real easy) , drain the gas out of the float bowls 1st. Clear a spot on the kitchen table (good luck) or good work surface. I like to use an old towel as it sort of keeps parts from rolling around. Just take your time and lay the parts out in order of removal, follow instructions in the kit. You might want to just replace the pump and see how it runs.
Thread Starter
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Junior User
Joined: Aug 2011
Posts: 95
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From: Oakland, CA
Looks like it's a Holley 80453. It's marked on the choke housing as you guys mentioned. I'm ordering an accelerator pump tomorrow morning and will try to replace it myself. I'll take pics.