INSTRUCTION SHEET OFF VEHICLE CARBURETOR SERVICE NIKKI - 2 BORE (MAZDA) - 50-597-2

Q: What safety and recording steps are required before disassembly?

Use the exploded view as a guide and generally follow the numerical sequence for disassembly. Record jet sizes before reassembly, and record the number of turns for the idle adjusting needle when lightly seating it for reference.

Q: Which parts should not be soaked during cleaning?

Do not soak diaphragm assemblies, floats, solenoids, or parts containing rubber material. Clean other parts long enough to soften and remove foreign material, then wash in suitable solvent and blow out passages with compressed air.

Q: How are idle and choke adjustments performed and verified?

Turn in the idle adjusting needle (83) until lightly seated, then back out to the recorded number of turns during reassembly. For choke cover installation, ensure the spring hook contacts the choke shaft arm and align the cover index mark with the housing center mark; follow the vehicle service manual for idle speed and mixture procedure, including fast idle checks.

Oct 24, 2026

Upload by miaandmiso

Off-vehicle carburetor service instruction sheet for a Nikki 2-bore carburetor application (Mazda), document 50-597-2. Provides a general exploded view overview, a numbered nomenclature and part list, and step-by-step disassembly, cleaning, and reassembly guidance with safety cautions about jet sizing records and avoiding prolonged soaking of non-removable plastic or sensitive components. Includes special setup notes for idle adjustment, choke cover installation, fast-idle checks, tamper-resistant models, and a bench adjustment data table by year and application.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Disassembly

Use of exploded view and safety notes

Nomenclature (exploded view parts list)

Cleaning

Solvent washing and compressed air guidance

Reassembly

Special instructions

Idle adjusting needle and choke cover alignment

Fast idle check and tamper-resistant choke models

Adjustment data table

INSTRUCTION SHEET OFF VEHICLE CARBURETOR SERVICE NIKKI - 2 BORE (MAZDA) 50-597-2 GENERAL EXPLODED VIEW THE GENERAL DESIGN AND PARTS SHOWN WILL VARY TO INDIVIDUAL UNITS COVERED ON THIS INSTRUCTION SHEET ff-32 37 22 21􀀉 i DISASSEMBLY USE EXPLODED VIEW AS A GUIDE. THE NUMERICAL SEQUENCE MAY GENERALLY BE FOLLOWED TO DISASSEMBLE UNIT FAR ENOUGH TO PERMiT CLEANING AND INSPECTION. JHS AND VENfUAl"S ARE COLOR CODED. PRIMARY JU$ AR£ BRASS COLOR AND SECONDARY JETS ARE SILVER COLOR. (BE SAFE, RECORD SIZES OF JETS BELOW ) DISASSEMBLY OF SECONDARY DIAPHRAGM ASSY. (23} 1$ NOT NECESSARY UNlESS DIAPHRAGM 1S BEING REPLACED. IDLE ADJUSTlNG NEEDLE (83) BEFORE REMOVING TURN IN COUNTING THE NUMBER OF TURNS IT TAKES TO LIGHTLY SEAT NEEOLE. RECORD F=OR REASSEMBLY. NOMENCLATURE REF. NO. REF. NO. l _ COTTER PIN -PUMP ROD 2. WASHER - PUMP ROO 3. RETAINER • PUMP LEVf.A 4_ PUMP LEVER & ROD ASSY. 5. SCREW & LKWSHA. {3) - RETAINER 6 RETAINER-CHOKE COVER 7. CHOKE COVER ASSY 8. GASKET - CHOKE COVER 9. SPRING-SEC. RETURN 10. SCREW - CHOKE COIL l. EVER 11 _ LEVER - CHOKE COIL 12. COTTER PIN - CHOKE PULL OFF ROD 13. WASHER - CHOI<£: PULL OFF ROD 14. SCREW & LKWSHR. (2} -CHOKE HOUSING & CHOKE PUl.L OFF 15. CHOKE PULL OFF & HSG. ASSY 16. SOLENOID - (OLE SHUT OFF 17. PLUNGER-SOLENOID 18. GASKET-SOLENOID 19. COTTER PIN-THROTTLE LINK 20 WASHER (2} -THROTTLE UNK 21. RETAINER · SEC. DIAPHRAGM ROD 22. SCREW & lKWSHR. (3► -SEC. DIAPHRAGM ASSY. 23. SECONDARY DIAPHRAGM AS$Y. 24. GASKET - SEC. DlAPHRAGM ASSY. 25. Rl:TAINER-FAST IDLE ROO 26. BOLT-FUEL INLET 27. GASKET (2) - FUEL INLET BOLT 28. SCREEN-FUEL INLET 29. FITTING • FUEL INLET 30. SCREW & LKWSHR 12} • FITTING LOCK 31. LOCK-FUEL FITTING 32. SCREW & LKWHSR. (5} - BOWL COVER 33. BOWL COVER ASSY 34. PIN - FLOAT 35. FLOAT & LEVER ASSY. 36. GASKET-BOWl COVER 37. NEEOLE, SEAT & GASKET ASSY 38. PUMP ASSY. 39. BOOT -PUMP 40. SPRING • PUMP RETURN 41. RETAINER-SCREEN 42. SCREEN - PUMP CHECK 43. BALL-PUMP DISC CHECK 44. PLUG - PUMP rnsc PASSAGE 45. BALL & $PRING ASSY. - PUMP DISC 46. PLUG - SLOW JET 47. JET - SLOW 4B. JET - PRl. SLOW AIR BLEED 49. JET -sec. $LOW AIR BLEED 50_ SEAL - PRI. VENTURI TUBE 51. JET - PRI.MA1N AIR BLEED 􀏥 52. SCREW & LKWSHR. (2) -PAI, VENTURI ASSY. 53. VENTURI ASSY. -PRIMARY 54. GASKET-PAI. VENTURI 55. SEAL - SEC. VENTURI TUBE 56. JET - SEC. MAIN AIR BLEED 57. SCREW & LKWSHR. (2) - SEC. VENTURI ASSY. 58. VENTURI ASSY. -SECONDARY 59. GASKET - SEC. VENTURI 60. PLUG-STEP JET 61, JET - STEP 62. JET-PAI. STEP AJA BLEl:D 63 JET-SEC. STEP AIR BLEED 64. POWER VALVE ASSY 65. GASKET-POWER VALVE 66. JET-SECONDARY MAIN 67. GASKET -SEC. MAIN JET 68. SCREW (21-COVER 69. COVER - LEVEL GAUGE 70. GASKH-COVER 7l. WINDOW-LEVEL GAUGE 72. SEAL - WINDOW 73. PLUG - PAI. JET 74. GASl(ET • PLUG 75. JET · PAL MAIN 76. GASKET • PRI. MAIN JET 77. SCREW& LKWSHR. (2) -THROTTLE BODY 78. SCREW & LKWSHR. (1i-THROTTLE BODY 79, BOWL ASSY. 80. GASKET-THROTTLE BODY 81. SCREW & LKWSHR, - COVER 82. COVER - IDLE ADJ. NEEDLE 83 NEEDLE - IDLE ADJUSTING 84. SPRING • IDLE ADJ. NEEDLE 85. THROTTLE BODY A::)SY CLEANING CLEANING MUST BE DONE WITH CARBUAHOR DISASSEMBLED SOAK PARTS LONG ENOUGH 10 SOFTEN AND REMOVE ALL 􀏦OREIGN MATERIAL. (CAUTION: DO NOT PROLONG SOAKING OF PARTS CONTAINING PLASTIC MATERIALS THAT ARE NOTREMOVABLE. )MAKE CERTAIN THE THROTTLE BORES ARE FREE OF ALL CARBON DEPOSITS. WASH OFF IN SUITABLE SOLVENT. BJ..OW OUT ALL PASSAGES INCASTINGS WITH COMPRESSED AIR ANC CHECK CAREFULLY TO INSURE THOROUGH CLEANING OF OBSCURE AREAS . 00 NOT SOAK DIAPHRAGM ASSEMBLIES. FLOAT, SOLENOIDS OR PARTS CONTAINING RUBBER MATERIALS. REASSEMBLY REASSEMBLE IN REVERSE ORDER OF 01$A$$EMSLY. NOTE SPECIAL INSTRUCTIONS ANO ADJUSTMENTS SPECIAL INSTRUCTIONS IDLE ADJUSTING NEEDLE(83) -TUAN NEEDLE IN UNTIL LIG'°'TLV SEATED, THE.N BACK OUTNUMBER OF T

FAQs

What safety and recording steps are required before disassembly?

Use the exploded view as a guide and generally follow the numerical sequence for disassembly. Record jet sizes before reassembly, and record the number of turns for the idle adjusting needle when lightly seating it for reference.

Which parts should not be soaked during cleaning?

Do not soak diaphragm assemblies, floats, solenoids, or parts containing rubber material. Clean other parts long enough to soften and remove foreign material, then wash in suitable solvent and blow out passages with compressed air.

How are idle and choke adjustments performed and verified?

Turn in the idle adjusting needle (83) until lightly seated, then back out to the recorded number of turns during reassembly. For choke cover installation, ensure the spring hook contacts the choke shaft arm and align the cover index mark with the housing center mark; follow the vehicle service manual for idle speed and mixture procedure, including fast idle checks.

Oct 24, 2026

Upload by miaandmiso