Marvel- Schebler Carburetor Repair Manual. GROUP II, ENGINESECTION S, FUEL SYSTEMC. An understandingof their construction and how they operate aswell as an understanding of their function withrespect to the engine will not only avoid manyfalse leads on the part of the service man in diag- nosing so- called carbureter complaints but willcreate customer satisfaction and a profitablebusiness for the progressive service shop. To understand a carbureter it is necessary torealize that there is only one thing that a carbur- eter is designed to do and that is to mix fuel andair in the proper proportion so that the mixturewill burn efficiently in an engine. ![]()
![]() It is the func- tion of the engine to convert this mixture intopower. There are three major factors in an enginewhich control the change of fuel and air intopower : 1—Compression. Car- buretion. Carburetion has been listed last because it isabsolutely necessary for the engine to have goodcompression and good ignition before it can havegood carburetion. When the average person thinks of . Carburetion is the combined functionof the carbureter, manifold, valves, piston andrings, combustion chamber, and cam shaft. It can be readily seen that . Inability to understandall the factors that effect engine operation is thereason many service mechanics change from fac- tory standards and attempt to improve on theengine set- up by their own methods or . All that any service mechanic should evertry to do is to make the particular engine he isworking on as good as the manufacturer in- tended it to be, but he can make it a lot worse. Far too many engines are running below theirstandard of performance in service today. For the carbureter to accomplish its functionit must be able to vary the mixture strength de- pendent upon the engine demands. It mustsupply a mixture strength that will allow the en- gine to give maximum horsepower, whenever thethrottle is fully opened, while at part throttleconditions it must lean out the mixture so thatmaximum economy can be obtained. In additionit must have flexibility throughout the entirerange of operating speeds, from idle and partthrottle to full power wide open throttle posi- tion. The carbureter must also have an acceler- ating . In other wordsthe carbureter not only varies the volume of fueland air that enters the engine but also varies theamount of fuel that goes in with a given amountof air, in order to produce the proper mixtureproportion for any condition under which theengine is operating at any time. In order to understand the function and opera- tion of the Marvel- Schebler Tractor and Indus- trial Carbureters it is well to consider the systemsthat make up each carbureter. These systemsare : The Float System, The Idle System, The. Power Fuel Feed System, The Back Suction. Economizer System, and The Choke System. A thorough knowledge of each system willhelp the service mechanic to quickly locate andcorrect legitimate carbureter complaints as wellas to inspect, repair, and put back to standardany carbureter that requires an overhaul. R 1- 2. 58- 2- 5. Marvel Schebler Overhaul Manual Ma 4spa.pdf Free Download Here PRECISION AIRMOTIVE’S. SERVICE MANUAL Marvel-Schebler aircraft carburetor parts and serv-ice. SECTION S, FUEL SYSTEM C Marvel-Schebler Carbureter Marvel-Schebler Carbureters are used on thousands of tractor and industrial engines and have. MA3-SPA Marvel Schebler Carb. Generic float carb service guidelines. Marvel-Schebler Carb Principles. ![]()
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