Bullnose Gator Posted December 13, 2021 Author Share Posted December 13, 2021 Your latest description brought something else to mind - the choke. If the choke is set too rich the engine will start running rough and potentially die. What I'd do is start the engine, cold, with the air cleaner off and watch the choke. If it is still on a bunch when the engine starts running rough I'd manually open the choke a bit to see if that helps. If so, we are onto something. Thanks. I've never messed with the choke before, are all Holley's the same? I'll youtube how to adjust it, but wanted to make sure I don't screw anything up by following whatever videos I find. Link to comment Share on other sites More sharing options...
FuzzFace2 Posted December 13, 2021 Share Posted December 13, 2021 Thanks. I've never messed with the choke before, are all Holley's the same? I'll youtube how to adjust it, but wanted to make sure I don't screw anything up by following whatever videos I find. Holley chokes have been known to be a little finaky and need some playing with at least most of mine did. Dave ---- Link to comment Share on other sites More sharing options...
Gary Lewis Posted December 13, 2021 Share Posted December 13, 2021 Thanks. I've never messed with the choke before, are all Holley's the same? I'll youtube how to adjust it, but wanted to make sure I don't screw anything up by following whatever videos I find. You never know what you are going to find with Youtubes since literally anyone can make them. Personally I prefer to read what the factory had to say about a subject since their techs used their documentation. There are two such documents here: Documentation/Fuel & Air Systems/Carburetors, Chokes, & EFI/Holley 4180C. Link to comment Share on other sites More sharing options...
Bullnose Gator Posted January 24, 2022 Author Share Posted January 24, 2022 You never know what you are going to find with Youtubes since literally anyone can make them. Personally I prefer to read what the factory had to say about a subject since their techs used their documentation. There are two such documents here: Documentation/Fuel & Air Systems/Carburetors, Chokes, & EFI/Holley 4180C. I've messed with the choke and both fuel bowls as far as I can (too far, the front fuel bowl gasket that I recently replaced now needs to be replaced again). Still can't get it to run right, so I've decided to go ahead and replace the carb with the one below. Should this be a straight forward swap out, or is there anything about my engine (e.g. all the emissions stuff) that I'll need to give special consideration? Also, just curious, why do carbs specify automatic vs manual transmissions? I wouldn't have expected the type of transmission to impact the carb, but that's how little I know. https://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0 Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 24, 2022 Share Posted January 24, 2022 I've messed with the choke and both fuel bowls as far as I can (too far, the front fuel bowl gasket that I recently replaced now needs to be replaced again). Still can't get it to run right, so I've decided to go ahead and replace the carb with the one below. Should this be a straight forward swap out, or is there anything about my engine (e.g. all the emissions stuff) that I'll need to give special consideration? Also, just curious, why do carbs specify automatic vs manual transmissions? I wouldn't have expected the type of transmission to impact the carb, but that's how little I know. https://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0 Jeremy - I can't answer your question about the carb as I get "Access Denied" when I click on the link so I don't know what carb it is. As for manual vs automatic, an auto has to have the kickdown or TV linkage and a manual doesn't. Link to comment Share on other sites More sharing options...
Bullnose Gator Posted January 24, 2022 Author Share Posted January 24, 2022 Jeremy - I can't answer your question about the carb as I get "Access Denied" when I click on the link so I don't know what carb it is. As for manual vs automatic, an auto has to have the kickdown or TV linkage and a manual doesn't. That's unfortunate. I'll try it again, but no worries if it still doesn't work. It looks just like my current carb, so I'll give it a go. Thanks, again, for all your help. https://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0 Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 24, 2022 Share Posted January 24, 2022 That's unfortunate. I'll try it again, but no worries if it still doesn't work. It looks just like my current carb, so I'll give it a go. Thanks, again, for all your help. https://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0 Sorry. I still get: Access Denied You don't have permission to access "http://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0" on this server. Reference #18.9736d517.1643058738.e2736e2 Link to comment Share on other sites More sharing options...
Bullnose Gator Posted January 24, 2022 Author Share Posted January 24, 2022 Sorry. I still get: Access Denied You don't have permission to access "http://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0" on this server. Reference #18.9736d517.1643058738.e2736e2 Weird. Just to see what it does I tried the "Link" button. Other than that you'd probably have to go to autozone.com and search part #nd4851m directly. Don't worry about it though, thanks for trying. http://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0 Link to comment Share on other sites More sharing options...
mat in tn Posted January 25, 2022 Share Posted January 25, 2022 Weird. Just to see what it does I tried the "Link" button. Other than that you'd probably have to go to autozone.com and search part #nd4851m directly. Don't worry about it though, thanks for trying. http://www.autozone.com/fuel-delivery/carburetor/p/national-remanufactured-carburetor-nd4851m/577135_0_0 i got right to the autozone page. that looks exactly to be a replacement for the 351/5.8 H.O. is that the engine you have? im not certain of what issues you are having Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 25, 2022 Share Posted January 25, 2022 i got right to the autozone page. that looks exactly to be a replacement for the 351/5.8 H.O. is that the engine you have? im not certain of what issues you are having His signature says 460. And the 351HO and 460 both used the 4180C, although jetted differently. Strange that I can't get in. Link to comment Share on other sites More sharing options...
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