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Disassembly, Cleaning and Repair of Tecumseh Vector Carburetor

Tecumseh Carb Part Numbers 632540, 632614, 632671, 632671A, 632671B, 632671C, 632707, 632727, 632727A, 632757, 632757A, 640020, 640020A, 640020B, 640158, 640158A
used on selected Models 143.434112, 143.434252, 143.945500, 143.956000, 143.956002, 143.956006, 143.966000, 143.966006, 143.966008, 143.966500, 143.966502, 143.966504, 143.966506, 143.966508, 143.975512, 143.975514, 143.976000, 143.976006, 143.976008, 143.976500, 143.976502, 143.976600, 143.976602, 143.976604, 143.976604, 143.976608, 143.976610, 143.976612, 143.986008, 143.986516, 143.986600, 143.986700, 143.986706, 143.986708, 143.986710, 143.986712, 143.986720, 143.996500, 143.996700, 143.996704, 143.996706, 143.996708, 143.996710, 143.996712, 143.006500, 143.006704, 143.006706, 143.006710, 143.016500, ULT50-500031B, ULT50-500031D, ULT50-500032B, ULT50-500032C, ULT50-500032D, ULT50-500033B, ULT50-500033C, ULT50-500033D, ULT55-501050A, ULT55-501051A, ULT55-501051B, ULT55-501051C, ULT55-501052A, ULT55-501052B, ULT55-501052C, ULT55-501053A, ULT60-502049C, ULT60-502050C, ULT60-502053C, ULT60-502053D, ULT60-502054C, VLV126-500036F, VLV126-500036G, VLV126-500037F, VLV126-500038G, VLV126-501012E, VLV126-501061E, VLV126-501061F, VLV126-502005E, VLV126-502016E, VLV126-502016F, VLV126-502019E, VLV126-502019F, VLV126-502030E, VLV126-502030F, VLV126-502031E, VLV126-502031F, VLV126-502032E, VLV126-502037F, VLV126-502039E, VLV126-502040F, VLV126-502041F, VLV126-502042E, VLV126-502043E, VLV126-502043F, VLV126-502044F, VLV126-502045E, VLV126-502045F, VLV126-502046E, VLV126-502052E, VLV126-502052F, VLV126-502056E, VLV126-502056F, VLV126-502058E, VLV126-502058F, VLV126-502060E, VLV126-502060F, VLV126-502069E, VLV126-502070E, VLV126-502071E, VLV126-502072E, VLV126-502073E, VLV126-502078E, VLV126-502078F, VLV126-502080E, VLV126-502081E, VLV126-502082E, VLV126-502083E, VLV126-502083F, VLV126-502084E, VLV126-502085E, VLV126-502085F, VLV126-502086E, VLV126-502086F, VLV126-502088E, VLV126-502088F, VLV126-502089E, VLV126-502090F, VLV126-502091F, VLV126-502092F, VLV126-502520D, VLV126-502522D, VLV126-502522E, VLV126-502523D, VLV126-502523E, VLV126-502524D, VLV126-502525D, VLV126-502526D, VLV126-502527D, VLV126-502527E, VLV126-502528D, VLV126-502529D, VLV126-502530D, VLV126-502530E, VLV126-502531D, VLV126-502532E, VLV126-502533E, VLV126-502534E, VLV40-400004A, VLV50-500001, VLV50-500002, VLV50-500003, VLV50-500004, VLV50-500005, VLV50-500006, VLV50-500007, VLV50-500007A, VLV50-500008, VLV50-500009, VLV50-500010, VLV50-500012A, VLV50-500013A, VLV50-500014A, VLV50-500015B, VLV50-500016A, VLV50-500017A, VLV50-500020A, VLV50-500022B, VLV50-500023B, VLV50-500024B, VLV50-500025B, VLV50-500026B, VLV50-500028B, VLV50-500029B, VLV50-500030B, VLV50-500034C, VLV50-500036E, VLV55-501001, VLV55-501001A, VLV55-501002, VLV55-501002A, VLV55-501003, VLV55-501004, VLV55-501004A, VLV55-501005, VLV55-501007, VLV55-501007A, VLV55-501008, VLV55-501009A, VLV55-501010, VLV55-501010A, VLV55-501011A, VLV55-501012A, VLV55-501012B, VLV55-501012C, VLV55-501012D, VLV55-501013, VLV55-501013A, VLV55-501014A, VLV55-501015A, VLV55-501016B, VLV55-501017A, VLV55-501017B, VLV55-501017C, VLV55-501017D, VLV55-501018A, VLV55-501018B, VLV55-501018C, VLV55-501018D, VLV55-501019A, VLV55-501019B, VLV55-501020A, VLV55-501021A, VLV55-501022A, VLV55-501023A, VLV55-501024A, VLV55-501025A, VLV55-501026A, VLV55-501027A, VLV55-501028A, VLV55-501029A, VLV55-501030A, VLV55-501031A, VLV55-501032A, VLV55-501033A, VLV55-501034A, VLV55-501035A, VLV55-501036A, VLV55-501037A, VLV55-501039A, VLV55-501039B, VLV55-501039C, VLV55-501042A, VLV55-501043A, VLV55-501044A, VLV55-501045A, VLV55-501047A, VLV55-501048A, VLV55-501049A, VLV55-501055A, VLV55-501056A, VLV55-501057A, VLV55-501057B, VLV55-501058A, VLV55-501059A, VLV55-501059B, VLV55-501059C, VLV55-501060B, VLV55-501061B, VLV55-501061C, VLV55-501061D, VLV55-501062B, VLV55-501062C, VLV55-501062D, VLV55-501063B, VLV55-501064B, VLV55-501064C, VLV55-501066C, VLV55-501067B, VLV55-501068C, VLV55-501069C, VLV60-502001A, VLV60-502001B, VLV60-502002A, VLV60-502002B, VLV60-502003A, VLV60-502004A, VLV60-502005A, VLV60-502005B, VLV60-502005C, VLV60-502005D, VLV60-502007A, VLV60-502007B, VLV60-502008A, VLV60-502008B, VLV60-502009A, VLV60-502009B, VLV60-502010A, VLV60-502010B, VLV60-502010C, VLV60-502011B, VLV60-502011C, VLV60-502012A, VLV60-502013B, VLV60-502013C, VLV60-502013D, VLV60-502014B, VLV60-502014C, VLV60-502014D, VLV60-502015B, VLV60-502015C, VLV60-502016B, VLV60-502016D, VLV60-502017B, VLV60-502017C, VLV60-502018B, VLV60-502018C, VLV60-502019B, VLV60-502019C, VLV60-502019D, VLV60-502020B, VLV60-502021B, VLV60-502022B, VLV60-502022C, VLV60-502023B, VLV60-502024B, VLV60-502025B, VLV60-502025C, VLV60-502026B, VLV60-502027B, VLV60-502027C, VLV60-502027D, VLV60-502028B, VLV60-502028C, VLV60-502028D, VLV60-502029B, VLV60-502029C, VLV60-502030B, VLV60-502030C, VLV60-502030D, VLV60-502031B, VLV60-502031C, VLV60-502032B, VLV60-502032C, VLV60-502033B, VLV60-502034C, VLV60-502035C, VLV60-502037C, VLV60-502037D, VLV60-502039C, VLV60-502039D, VLV60-502040D, VLV60-502041C, VLV60-502041D, VLV60-502042C, VLV60-502042D, VLV60-502044C, VLV60-502044D, VLV60-502045C, VLV60-502045D, VLV60-502046C, VLV60-502046D, VLV60-502047C, VLV60-502051C, VLV60-502052C, VLV60-502052D, VLV60-502055C, VLV60-502055D, VLV60-502056D, VLV60-502058D, VLV60-502060D, VLV60-502062D, VLV60-502068D, VLV60-502069D, VLV60-502070D, VLV60-502071D, VLV60-502072D, VLV60-502073D, VLV60-502074C, VLV60-502076D, VLV65-502501A, VLV65-502502A, VLV65-502503A, VLV65-502504A, VLV65-502505A, VLV65-502506B, VLV65-502510B, VLV65-502520C, VLV65-502521C, VLV66-502505B, VLV66-502505C, VLV66-502507B, VLV66-502508B, VLV66-502509B, VLV66-502511B, VLV66-502512B, VLV66-502513B, VLV66-502514C, VLV66-502515C, VLV66-502516C, VLV66-502517C, VLV66-502518C, VLV66-502523C, VLXL50-500008A, VLXL50-500015A, VLXL50-500018A, VLXL50-500019A, VLXL50-500021A, VLXL55-501009, VLXL55-501011, VLXL55-501012, VLXL55-501016

#1. Tecumseh Vector Carb
The Vector carburetor is a float feed, nonadjustable carburetor, with a one piece extruded aluminum body. The float bowl, float, nozzle, and venturi are nonmetallic, which eliminates the corrosion and varnishing problems associated with similar metallic parts. Common service areas of the carburetor are contained in the fuel bowl, which include the float, needle, seat and main nozzle emulsion tube. All of these parts can be serviced without removing the carburetor body from the engine. (#1).
#2. Intake end of carb
This view of the intake end of the carb shows the bowl vent and primer passage (#2, black) and the ball plug which seals an idle circuit passage (#2, purple).
#3. Drain screw, ball plug and welch plug
A ball plug seals the location where the idle air bleed hole was drilled into the carb bore (#3, yellow). A welch plug seals the idle fuel mixing well (#3, green). The bowl drain screw is shown in #3, blue.
#4. Main jet and drain screw
The main jet is held in place by the bowl drain screw and a spring (#4). An o-ring provides a seal between the main jet and the carb body. A rubber washer seals the drain screw. Some models of the Vector carb, called 'split system' because the main and idle circuits are separate, omit the spring, main jet and o-ring shown here. On those models the main jet is manufactured as part of the lower end of the emulsion tube. On 'married system' carburetors all fuel passes through the main jet first, and the idle fuel then separates off to the idle restrictor jet.
#5. Bowl gasket
To remove the fuel bowl, pry the bowl retainer clip down and away to the rear of the carb. The bowl can then be pulled straight down. A gasket provides the seal between the bowl and body (#5).
#6. Emulsion tube, o-ring and spring
The emulsion tube has one o-ring at its lower end (#6). A spring below the tube presses it up for a seal against the bowl gasket. The upper end of the tube is the fuel nozzle which extends into the venturi. Holes in the side of the tube allow air from the main air bleed to mix with the fuel as it passes upward to the nozzle.
#7. Float hinge rod snaps in place
The float hinge rod snaps into place and can be removed by prying it up with a pick tool or pulling with pliers (#7).
#8. Inlet seat and retainer in place
The seat for the float needle is rubber (#8). The seat is secured by a retaining clip on some carbs.
#9. Inlet seat and retainer
Inlet needle seat and retainer (#9).
#10. Grooved side goes in first
The grooved side of the rubber seat goes in first (#10, left). The side with the chamfered hole mates to the needle (#10, right)
#11. Float, needle and rod
The inlet needle snaps into position on the float (#11).
#12. Inlet needle
Check the inlet (float) needle for damage or corrosion (#12).
#13. Remove welch plug
Use a sharpened punch to pierce the welch plug covering the idle fuel mixing well and pry it out (#13).
#14. Idle fuel mixing well
Air from the idle air bleed and fuel from the idle jet arrive at the idle mixing well (#14). The smaller holes enter the carb bore near the throttle plate closed position.
#15. Idle discharge ports
Fuel mixed with air enter the carb bore when the throttle is near the closed position (#15.
#16. Idle restrictor jet
After passing through the main jet, some fuel is drawn through the idle restrictor jet (#16, yellow). From here it passes by the gasket and into the carb body at (#19, blue). Air from the main air bleed (#17, green) flows down to the emulsion tube via the passage at #16, green.
#17. Venturi, main air bleed, idle air bleed
The main air bleed circuit begins just before the venturi (#17, green). The idle air bleed begins at #17, yellow just opposite the ball plug at #3, yellow where it intersects with the passage sealed by the ball plug at #2, purple.
#18. Removable venturi
With the emulsion tube removed the venturi can be slid out (#18) and the air bleeds can be more easily seen in the carb bore.
#19. Vents, fuel and bleed passages
The two holes shown in #19, red connect to the passage at #19, black and vent the fuel bowl. They also are used by the primer. The hole shown by #19, green is part of the main air bleed path. It originates at #17, green and continues to #16, green where it supplies air to mix with the fuel in the emulsion tube. Fuel for the idle circuit flows through #19, blue from #16, yellow and continues to the idle mixing well. The center hole (#19, yellow) is where the emulsion tube / nozzle extends into the venturi. The ball plug at #19, purple seals the end of a hole drilled to the mixing well. Alignment holes at #19, pink allow the bowl and gasket to fit only one way.
#20. Air filter body
The primer is built into the air filter body and requires a good seal between the area shown at #20, red and the carb body. The air filter body is prone to deformation from rough use and over-tightening resulting in priming problems (#20, yellow).
#21. Primer sealing area
The outer perimeter of the primer bulb must seal tightly against the filter body. When the primer bulb is pressed part way, the surface shown at #21, red must seal against the center boss on the filter body shown in the next photo. As the bulb is pressed further, air is forced through the center hole and on to #19, black and from there to #19, red. The air forced into the bowl pushes fuel up the main nozzle, accomplishing priming for easy starts. A good seal at the bowl gasket is also necessary.
#22. Primer body sealing area
When the primer bulb is not depressed there is a complete path for filtered air through the two outer holes, out the center hole (#22) and on to the fuel bowl, thus providing venting.
#23. Throttle plate
When installing the throttle plate (#23) on the 2 - 7 hp carburetor, position the plate with scribe mark facing out and in the 12 o'clock position; 8 - 17 hp carburetor => 3 o'clock position. Make sure that the throttle plate does not bind.
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