Next, remove the carburetor, clean the gasket mating surface, and install the provided intake flange gasket on the intake manifold. Some are very large and might take some time to download, depending on your internet connection. The numerical sequence may generally be followed to disassemble unit far enough to permit cleaning and. Rochester carburetors were quite possibly the most widely used carburetor in the twentieth century, with over one million units produced by the delco carburetor company, a division of general motors. Starting around 1968, there were numbers stamped on a flat area of the quadrajets main body, just above the secondary throttle shaft. The rochester quadrajet, in its various forms and configurations, has been used by various gm divisions for various applications since the mid sixties. It would get 5 stars, but my specific carb was omitted, leaving me wondering a bit on some of the electric portions of the carb. Your guide to the most popular rochester carburetors 2barrel this original rochester 2g has definitely earned its keep over the decades, and it shows. Some of the most soughtafter rochester carbs are the tri power carburetors that used three rochester twojet 2g carbs on the oldsmobile j2 setup, 348. This is a new adjustment to insure positive closing of secondary throttle valves.
Rochester quadrajet parts jet performance products. Rochester quadrajet carburetor rebuild kits carburetor. This basic manual contains the information necessary for the installation of the throttle body, wiring, and sensors. Helpful information you need when you rebuild your carburetor. Free carburetor repair manuals manuals are downloaded as pdf files. Rochester quadrajet identification 70 41 2 6 7 example.
If the carb is a carter manufactured under license from rochester, the number will be inside a round metal foil tag on the drivers side of the carb just above the primary throttle linkage. Technical information bulletin the corvette restoration page. If you have long tube headers, mount the sensor approximately 610 after the collector. A free and open source software to merge, split, rotate and extract pages from pdf files. We have been in the business of offering carburetor restorations for over 20 years and have a working staff of 15. If your vehicle has catalytic converters, the oxygen sensor must. Quadrajet carburetor 4mv4mcm4mem4mc service manual 9d5. Nov 01, 2001 read the tech article on a holley vacuumsecondary operation, brought to you by the experts at chevy high performance magazine. Rochester quadrajet 4 barrel carburetor parts carburetor. Rochester carburetors detailed instructions and 650 illustrations show you how to rebuild and tune your rochester carb. Rochester carburetor troubleshooting by john stevens j.
Combine multiple pdf files into one single pdf document. Photo 1 the qjet first appeared for the 1966 model year and replaced the rochester 4g and 4gc carburetors. Holley 2300 carburetor rebuild manual from a 1962 repair manual. Detailed specifications and parts lists are here for 19801986 models. Small base 2g 2gc 2gv 2jet and chevrolet 4g 4gc 4jet and quadrajet qjet be sure to scroll all the way down the page to see all items. Originally used on a 75 buick with a 455 engine, it would work on many v8 buick applications from the mid 70s. Identification codes indicate the car or truck a carburetor was designed for and what transmission it was used with.
The service procedures recommended by rochester products division and described in this. Covers quadrajet, twobarrels, monojet, 4gc and computer controlled carbs with complete rebuild instructions, mixture settings, basic adjustments, tuning for street or strip and tips on manifolds and fuel systems. The best part is all that grease it has preserved the carburetor and protected it from corrosion and other various maladies. Any variation from these installation instructions or modification made to any part in our tv made ez system will void all warranties, written, implied or otherwise. Quality rebuilt carburetors for mercruiser, holley, rochester, omc and more. All twobarrel carburetors had a cfm range of 285 to 450 cfm, and the original 2g used a manifoldmounted thermalspring assembly that connected to the choke via a linkage rod. If you are rebuilding a rochester carb, this is the book for you. How to rebuild a rochester quadrajet 4mv carburetor. A a l carburetor 9d5 march 1981 supersedes 9d5 models 4mv4mcm4mem4m c dated may 1973 service manual delco. Pdf merge combine pdf files free tool to merge pdf online. Holley vacuumsecondary operation tech article chevy high. Quadrajet casting number chart cliffs high performance. If you want to know how to rebuild and modify the rochester quadrajet, weve found the perfect resource.
Rochester carburetor rebuild kits and parts for all rochester. Our carburetor rebuild kits feature online exploded view instructions and adjustment specifications, quality gaskets, ethanol resistant accelerator pump components and hiflow needle and seats. We carry carburetor parts for most rochester carburetors. Replacement rochester quadrajet carburetors installation and troubleshooting guide 19681981 corvette thank you for choosing mid america motorworks for this high quality remanufactured rochester quadrajet carburetor. Dominate the dragstrip with gasoline or alcoholcompatible carburetors. Free carburetor repair manuals mikes carburetor parts. Rochester 4g 4gc carburetor identification youtube. By selecting the manufacturer of your golf cart below, you can have the website display only products that will work with your cart. Rochester carburetor models 4mc 4mv general exploded view the general design and parts shown will vary to individual units covered on this instruction sheet n1588 disassembly use exploded view as a guide. The mv model is equipped with a manifold mounted thermostatic choke coil. Rochester b, bc, bv, aa, bb carburetor manual be patient, this is a large file. Check the rochester parts page for more parts we have many parts that may not be listed call 2538334106 this carburetor was made by rochester, the rochester products division of general motors was located in rochester new york and built carburetors for. New rochester carburetor parts hot rod carburetors. There should be a metal disc affixed to the carburetor for those in the 1965 to 1968 range, and the number was.
Holley sniper efi fuel injection installation manual. The rochester quadrajet is a four barrel, two stage carburetor of down. Each bore contains a triple venturi arrangement equipped with plain tube nozzles. Check the rochester parts page for more parts we have many parts that may not be listed call 2538334106 this carburetor was made by rochester, the rochester products division of general motors was located in rochester new york and built carburetors for gm vehicles since 1949. Reported service complaints on 1955 model carburetor. We originally started pony carburetors in the cazenovia new woodstock, new york area in 1988, and in december 2003 we relocated our business to new mexico. The rochester twobarrel carburetor called the 2g, and later 2gc and 2gv, was introduced in 1955, and use of the 2g carburetor in automotive applications ended in 1979. The quadrajet carburetor has two distinct and separate design stages. This tech paper will discuss basic setup and tuning of quadrajet carbs for. Each stage operates to provide a blend of economical operation and responsive engine performance. Motorcraft 2700 7200 carburetor manual large file, but great manual. Our carburetors are completely remanufactured to the brim, bushings in throttle shafts, needle, seat, float, choke pulloff, rods, springs, check balls, accelerator plunger, accelerator cup and gaskets are new and. With years of qjet experience and hundreds of satisfied customers, our carbs are track proven and dyno tested.
There are two different size throttle bores on rochester twobarrel carburetors, one is 1 14 and the other is 1 12 inches. Includes theory of operation, detailed stepbystep service instructions, adjustment procedures and exploded diagrams. Download manuals for carter, holley, autolite, motorcraft, rochester, stromberg, solex, marvel. You must have at least 18 of exhaust pipe after the sensor. Autozone repair guide for your fuel system carbureted fuel system rochester 2gc, 2gv 2bbl. Carburetor service manuals carburetor parts by the. Starting in 1968, the number was stamped on the drivers side of the float bowl above the secondary throttle shaft. The last passenger car version of the carb appeared as an ecmcontrolled carb in 1981. Brass float rochester quadrajet carburetor 4m 4mc 4mv 1965 76 select carbs this float fits these original general motors rochester quadrajet carburetors 4m, 4mc, 4mv, m4m. The aluminum tags had an anodized color on the top side.
Choosing the right carburetor for your application is critical to optimum performance. In actuality, there were several different styles of rochester twobarrel carburetors manufactured since the 1955 release. Full coverage of 2g, b, quadrajet, 4g, monojet, and all other rochester models. Weve got 1barrel, 2barrel, 3barrel, and 4barrel carburetors from the top brandsholley, edelbrock, proform, willys, stromberg, and many more. New rochester carburetor parts hot rod carburetors custom. Delco rochester there are three basic model g rochester twobore carburetors. Place the sniper efi throttle body on top of the new flange gasket on the manifold. A secondary method of identification, but not present on all 4g series carburetors, is a stamp on the airhorn. That is why i have made this website to keep the carburetor business alive. Fc remanufactured products known as foreign carburetors since 1974. Rochester 1barrel, 2barrel, and 4barrel carburetor rebuild kits and parts. The 4m is the basic carburetor equipped for manual choke operation.
Permission is hereby granted to photocopy this brief summary page only for noncommercial purposes, for the bene. This float fits mercruiser quadrajet carburetora and these original general motors quadrajet carburetors 4m, 4 mc, 4mv, m4m brass replacement for rochester 7029854, 7033752, 7034399,7034454, 7046301 buick 196676, cadillac 1967. Make your selection from top carburetor manufacturers like edelbrock, demon, holley, jet, proform, quick fuel and more. Since its introduction in 1965, the rochester quadrajet has never received the respect it deserves. How to rebuild and modify rochester quadrajet carburetors by cliff. In 1981, rochester products and diesel equipment division merged in what was publicly. Jegs stocks a huge selection of carburetors from 2 to 4 barrel for circle track racing, street performance, muscle cars, drag racing and more. With over 30 million dollars in inventory and the most modern carburetor factory in the nation, we are the king of carburetors.
The primary side of the carburetor fuel inlet side has two small bores. How to decode rochester quadrajet carburetor numbers it. This manual covers all rochester qjet carbs including the 4mv, m4mc, m4me, m4med, e4me and e4med. Rochester four jet 4g 4gc 4 barrel carburetor parts. Id numbers for a rochester quadrajet carburetor are found next to the throttle level. This will include any universal parts or items that are not specific to any particular golf cart.
The 4g carburetor is equipped with a manuallyoperated choke valve. From street restoration to full race carb tuning, parts to quadrajet rebuild instructions, we have it. Most rochesterbuilt quadrajet carburetors were given a fournumber date stamp. Original factory service documentation for rochester carburetors used on general motors applications starting in 1967. Ingen filbegrensninger og ingen annonsevannmerker et gratis og nydelig verktoy som kombinerer pdffiler akkurat slik du onsker. More manuals for specific carburetors may be available there. Rochester quadrajet carburetors up to and including the 1967 model year were identified by a round, pressedin aluminum bottle cap tag on the drivers side of the float bowl near the front. Rochester carburetor troubleshooting it still runs. Manual or th400 trans throttle arm thats missing the portion below the. In most cases, these numbers can be used to identify the year and original application of the carburetor. Get more power from your classic muscle car or street machine with a new or remanufactured carb. Your guide to the most popular rochester carburetors. It is within very small circles that the rochester quadrajet is ever. The 2 ahead of the g means the carburetor has 2 bores, 2 venturii and 2 separate but identical metering systems, one for each carburetor bore.
From 1981, until the end of production, the qjet was electrified with a mixture control solenoid, which was part of gms computer command control engine management system. Rochester products division rpd was a division of general motors that manufactured. Ethanol blends in gasoline today are responsible for many fuel system issues and carburetor failures on older corvettes. The numerical sequence may generally be followed to disassemble unit far enough to permit cleaning and inspection. Most rochester built quadrajet carburetors were given a fournumber date stamp. The color was used internally by rochester plant employees to help in the identification of the carburetor. Rochesterbuilt quadrajets have numbers starting with 70 or 170. All rochester products identified by a o70o or o170. Rochester carburetor rebuild kits and parts for all. Tune up your automotive and marine rochester 4 barrel quadrajet carburetor with our usa made premium carburetor rebuild kits. It merges detailed, stepbystep directions, complete with images, links to online.
You can edit text directly in the editor, exchange photos or graphics, delete pages from the document or add new ones, merge several documents or permanently. The idle mixture needles are adjustable to blend the correct amount of fuel. Soda pdf merge tool allows you to combine pdf files in seconds. Please call us to discuss your application and its requirements. Also, rochester supplies replacement carburetors for chevrolets from 1932. This book does a great job explaining the function of the parts of the carb, which is a great tool to diagnose problems. Mix play all mix mikes carburetor youtube how to tune edelbrock carburetor carb idle mixture screws choke metering rods jets fuel air vacuum duration.
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