The design was in quantity production for much of the twentieth century. Prior to working on any carburetor, it must be completly removed from the bike, drained of all gas and dry. We are the worlds sole manufacturer of genuine su carburettors, fuel pumps and spares. Comments on su hs4 carburetor tuning did you find this article useful. Su carburetor rebuild h6 tom bryant, wiscasset, maine. Leave a rating or a comment below, and get instant reply notification via email if you have a long question, or a question not directly related to this article, please start a new topic in the discussion forums. Carburetor basics in order to accomplish the above, a carburetor requires two things. Some sus also have exhaust emissioncontrol devices to comply with antipollution laws. September 01, 2000 even though the su carburetter carb is a very basic yet precise instrument, some fundamental understanding on just how it works is needed to be able to deal with common problems and tuning. Technical editor back to basics, for those of you who are fairly new to the register and tso, is a series of articles designed to help the. This is intended to grow over time to become a very useful resource for all models of su carburettors, as fitted to many british classic cars such as jaguar, mg, morris, austin, and more.
Therefore, its best to check and verify the condition of the complete engine system before proceeding with an efi conversion. Work in a well ventilated area, away from any open flames or sparks. Su su carburettor photos and information posts welcome to the relaunched carb. Carburer means to combine with carbon compare also carburizing. If you are having problems or if the car has sat for a long time first set the carbs to a base line. Charles bishop i originally wrote this up to assist a fellow xker in adjusting the su s on his jag i received about a halfdozen requests to be included in the offlist mailing please note. Carburetters of a given specification are also described as having left hand. Rating is available when the video has been rented. For this reason most su carburettors were made either with no bushes at all, or with bronze bushes that were cast into the body but actually stopped short of entering the carb venturi. Since our early days we have supplied su carburetters, fuel pumps and parts. Excellent before and after sale service, many hard to find parts exclusively available in our online catalog.
When setting the idle on multiple carburetor installations, it is far easier and more accurate to use a carburetor synchronizing tool, such as part number stl00, than to listen to the hiss with a length of tube. Europes leading supplier of su carburetters, fuel pumps. Su carburetor is an example of a constant vacuum type of carburetor. If you are adjusting an existing carburetor or set. The following should be checked on the engine prior to setting up the carburetor to determine if the situation will lend itself to optimal timing, or. Both these designs give a smooth venturi wall to meet with the butterfly and a tight fit round the. Instead, go study one or more of my posts on su rebuilding, starting. Download su carburetor manual printable file pdf book. The area of the throat is varied by means of a piston which slides up and down. Retailer of classic su and zenith carburetters, fuel pumps and components.
Tuning includes mixture adjustment, idle speed adjustment, and synchronization. Rebuild kits float needle metering needle damper spring throttle shaft floats aston martin db1 2 liter thermo 194950 su 2xh4 auc 485t dr1450 6151 dr auc1167 ts1500 nt03. It has only one jet except in a few special types and very few moving parts. It is very reliable, but it can become dirty and choked and some parts wear out. Once carburetors are reassembled and installed on your car, it is now necessary to properly set the idle and mixture adjustments. The carburetor is responsible for supplying the right mix of vaporized fuel and air to make the engine work. Use pdf download to do whatever you like with pdf files on the web. Do you have a question or comment about this article. A carburetor american english or carburettor british english is a device that mixes air and. Following the outbreak of war in 1914, carburettor production nearly stopped, with the factory making machine gun parts and some aircraft carburettors.
Using a ruler and a finepoint pen, start from the mounting shoulder and make fine lines across the needle at precise 18th inch increments. By the interconnection between the throttle and the starting enrichment system on the carburetter. As well one could apply the technique to a two su hs4 carb. Carburetter company limited also manufactured dualchoke updraught carburettors for aeroengines such. Again, the primary purpose of this blog is to teach people about their sus and to show the types of problems that are often encountered during a rebuild so that others can benefit from my experiences.
How to repair, overhaul, strip down and reassemble the su carburettor. Carburetor installation and tuning ultima products. Basic knowledge even though the su carburetor carb is a very basic yet precise instrument, some fundamental understanding on just how it works is needed to be able to deal with common problems and tuning. Make sure all components of the ignition system timing, plugs, points, and wires are properly adjusted and working well, and that the valves are adjusted to specification before trying to adjust the carburetors. It is a drivers direct link to the internal combustion engine. Rivera primo su eliminator carb kit harley davidson 1955 to 2006.
With a felttipped marker, mark a line where the dashpots piston chamber meets the carb body. Xk 120 service manual the factory wrote some things in a more clear. An affinity with the su carburettor saw bill follow the distributorship to. In su and other variable jet carburetors, it was corrected by varying the jet. Adjustment of these is described in adjusting an emissioncontrol carburettor. The dealer and dealers customers must exercise good judgment in the use, control, alteration, part selection and installation, and maintenance of motorcycles.
Rebushing the mgb su carburettor hif4 mgb gt limited. Unlike other types of carburettor, which have fixed jets, the su has only one jet, so the mixture setting affects the engine throughout its speed range. Unfortunately, following discussions with many people, the operational principles of this carburettor appear to be poorly understood. If the engine is running reasonably well you may skip these first steps.
Su carburetors since 1976, terrys jaguar has been in the business of supplying a wide range of parts for jaguars everything from xk120, xk140, xk150 and all xke etype parts models right through to the latest jaguars on the road. Push on the gas pedal and it is the carburetors job to make the car go faster. Please use our product search boxes below to find your carburettor, fuel pump or spare part for your vehicle or have a look around our store to find a range of accessories to fill your needs. They should be removed from the engine for cleaning. Su carburettors are a brand of carburettor of the constantdepression type. The worlds sole manufacturer of genuine su carburettors, fuel pumps and spares. You are reading this page, so maybe things have not gone as planned. Todays post is about my recent rebuild of a pair of h6 carburetors from a triumph tr3b. Preparation setting up and tuning an su carburetor is based on the premise that both the engine and the carburetor are in good shape. Minis with carburettor engines were always fitted with su skinners union carburettors.
Rivera primo su eliminator ii carb kit harley davidson 1955 to 2006. The worlds sole manufacturer of genuine su parts su carburetters. A carburetor is a device for atomizing and vaporizing the fuel and mixing it with the air in varying proportions to suit the changing condition of spark ignition engines. Just as in a su needle catalog, we first need to have accurate measurements of the needle needles, if a multi carb engine before starting any mods. Twin su s are straightforward to set up, with three main areas of adjustment. First you need to be comfortable with the main aim of any carb to supply the engine with a finely atomized fuel. They both arrive at the same result, a properly tuned tri carb using two different roadways. Checking and cleaning an su carburettor how a car works. Following is as basic a description of whats going on that i can manage.
Solex carburetor is widely used by many top european automobiles as like rollsroyce, porsche, volkswagen, and mercedes benz. The foregoing adjustment methods were gleaned from the austin healey workshop manual a bmc publication. Su carburetor working of su carburetor the engineers post. Many times a carburetor is looked at as the prime culprit or the main cause for a myriad of other enginerelated difficulties that might exist. Rebushing the mgb su carburettor hif4 rebushing hif4. The airfuel mixture so obtained from the carburetor known as the combustible mixture. Su carburetors have a minimal number of moving parts and are easy to tune, providing of course you understand the operational principles. It is the intention of this article to help clarify those principles in the hopes that many owners will be able to tune and maintain their su carburtetors. Su carburetters are the worlds sole manufacturer of genuine su carburettors, fuel pumps and spares.
Su carb the worlds sole manufacturer of genuine su parts. Today we are one of europes leading suppliers and our stocks are extensive. The following diagrams show the identification system used. Before tuning the carburettor, carry out all the checks in checking and. It is assumed that your carbs have been properly rebuilt and the jets centered. To my way of thinking it is one of the cheapest, most accurate and hence the best way to balance the su carbies. Whether you need a gasket pack, a needle valve, a service kit, a repair kit, fuel pump or a complete carburetter, chances are we will have it in stock ready for despatch on the same day as you.
In indian automobile engineering, fiat cars are a most popular brand due to its very easy start in cold conditions this easy start is obtained by solex carburetor. How to rebuild a carburetor on a chainsaw, weedeater, etc. Serious injury, death and property damage can result from the improper use, control alteration or maintenance of motorcycles. This merger gave midel the ability to contiue offering its range of su carburettors, parts. The carburetor is the most important part of the fuel system of spark ignition engines. Assuming that you have followed the instructions on the preceding two pages your should now be enjoying the renewed performance and economy of your new s. Congratulations on your purchase of the merge aps accelerator pump spring these instructions are intended to provide the competent mechanic with the information necessary to correctly install and adjust this merge product. It consists of a single jet in which a tapered needle operates.