GAYGS FROM TOPOF CASTING TO TOP OirroAr - CIUCING POMi3118 BACK CilUDiNG POINT ,1:!6 BACL PROM TOE, tG*TL" ACANSI NEEDLE @ nEMOVEFLO&T AND BENO FLOAT ARM UP OR OOWN 47 NOTCH TO LOIYST O 0°C. CIIIB"I1ETOIB lirLOlTLEVELYARliSOYE9 f1116 FROM SPEClFlCATIONB, lDdUITFL0AT AS FOLLOWS LEVEL TO0 MIOH HOLD IIETAINER FlRULY IN PLbCE I a AN0 @ 1 ANDPUS* DOWN ON CENTE'IOIFLOAiPONTOON10OBTAlnCO~SECTSETilNG LEYELTOOLOW LlFToYT METERING RODS REMOVE BDLENOlDCONHECIORSCREW. TURN LEAN MIXTURE SOLENOLO SCREW CLoCIWleL COUNTING NUMBER OF TURNS UNilL SCREW IS BOTTOMED LIGHTLY I* FLoiiT BOWL RECOW DUMBER Rol TURNS COUNTED TUANSCmLW COUNTERCLOCKWISE AND REMOVE SCREW LiFTSOLENOiD AWDCOHWLCTORF~~OM~LO~TBOWL R~UOYEFLO~~TANOBE~DFLOAT ARMUPTO ADJUST VISUALLY CHECK FLOAT ALIOHMEWT LITER ADJUSTING. REVC'-' PROCEDURE TO RE-INSTILL PLRTS RLUOYED. MAKING SURE ESOLEHOIC SCREW 4s BACKED OUTOFFLOAT BOWL EXACil" THE SAUL NUMBER COUNTED AT D1S455EUSLI FLOAT ADJUSTMENT (MECHANICIL SETTING) - - AIR HORN SCREH I mun I ZNING SEQUENCE (DUAL JET MODEL 200) FIG. 2 Delco Carburetor BULLETIN: 9D4A RED SECTION DATE MAY 1983 ADJUSTMENT PROCEDURES 2MC.M2MC.E2MC.M2ME.E2ME PAGE I (DUAL JET) REPLACES PAGE 1 NOTE: PERFORM ADJUSTMENTS APRIL 1979 IN PROPER SEQUENCE 3 0 0 AIR HORN SCREW TIGHTENING SEQUENCE (DUAL JET MODEL 210) FIG. 2A - 3 4 AIR HORN SCREW TIGHTENING SEQUENCE- DUALJET MODELS FIG. 2B 0 CIUG. ?.OM TOSOF C*Ol. VAIVI WILL wxr TO vrnr ITAC" 10 TOP or ?"UP ITEM LEVI* TO OFSUMS LEYII @."..o., LEV.. -8." SCIIIDIIVII W*ILI BlhD1NC LIVE" Owaon~~ vrtvrr COHILITEL" CLYICD NOTl MLKl SY" FAST IIDU CAM FOLLOWlR LlYI"1JOFF STrPI ON FAIT IDLE CAW AP ADJUSTMENT FIG. 3
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GAYGS F R O M TOPOF CASTING TO TOP O i r r o A r - C I U C I N G P O M i 3 1 1 8 BACK
CilUDiNG POINT ,1:!6 BACL PROM TOE,
t G * T L " A C A N S I NEEDLE
@ nEMOVEFLO&T AND BENO FLOAT A R M UP OR OOWN 47 NOTCH TO L O I Y S T
O 0 ° C . CII IB"I1ETOIB l i r L O l T L E V E L Y A R l i S O Y E 9 f 1 1 1 6 FROM SPEClFlCATIONB, l D d U I T F L 0 A T AS FOLLOWS
LEVEL TO0 MIOH HOLD IIETAINER FlRULY IN PLbCE I a AN0 @ 1 ANDPUS* DOWN ON CENTE' IO IFLOAiPONTOON10OBTAlnCO~SECTSETi lNG
LEYELTOOLOW L l F T o Y T METERING RODS REMOVE BDLENOlDCONHECIORSCREW. TURN LEAN MIXTURE SOLENOLO SCREW C L o C I W l e L COUNTING NUMBER OF TURNS UNi lL SCREW IS BOTTOMED LIGHTLY I* FLoiiT BOWL R E C O W DUMBER Rol TURNS COUNTED TUANSCmLW COUNTERCLOCKWISE A N D REMOVE SCREW LiFTSOLENOiD AWDCOHWLCTORF~~OM~LO~TBOWL R ~ U O Y E F L O ~ ~ T A N O B E ~ D F L O A T A R M U P T O ADJUST VISUALLY CHECK FLOAT ALIOHMEWT L I T E R ADJUSTING. REVC'-' PROCEDURE TO R E - I N S T I L L PLRTS RLUOYED. MAKING SURE ESOLEHOIC SCREW 4s BACKED OUTOFFLOAT BOWL E X A C i l " THE SAUL NUMBER COUNTED AT D1S455EUSLI
FLOAT ADJUSTMENT (MECHANICIL SETTING)
- -
AIR HORN SCREH I mun I ZNING SEQUENCE (DUAL JET MODEL 200)
FIG. 2
Delco Carburetor BULLETIN: 9D4A RED SECTION
DATE MAY 1983 ADJUSTMENT PROCEDURES 2MC.M2MC.E2MC.M2ME.E2ME PAGE I
(DUAL JET) REPLACES PAGE 1
NOTE: PERFORM ADJUSTMENTS APRIL 1979
IN PROPER SEQUENCE
3
0 0
AIR HORN SCREW TIGHTENING SEQUENCE (DUAL JET MODEL 210)
FIG. 2A -
3 4
AIR HORN SCREW TIGHTENING SEQUENCE- DUALJET MODELS
FIG. 2B
0 C I U G . ?.OM TOSOF C*Ol. VAIVI WILL w x r TO vrnr I T A C " 10 TOP or ? " U P I T E M
L E V I * TO
OFSUMS L E Y I I
@."..o., LEV.. -8." S C I I I D I I V I I W* IL I BlhD1NC L I V E "
O w a o n ~ ~ vrtvrr C O H I L I T E L " CLYICD N O T l MLKl SY" FAST IIDU CAM FOLLOWlR LlYI"1JOFF S T r P I ON F A I T IDLE CAW
AP ADJUSTMENT
FIG. 3
BULLETIN: 9D.8A RED SECTION DATE: MAY 1983 PAGE: 2
HIGHEST STEP OF FAST lDLE CAM
IN TO CONTaCT LEVER THFN SCREW IN SPECIFIED NUMBER OF THROTTLEY*LVEJ*RE
TURNS TO ADJUSTISET NOTE1 CLOSED
FAST IDLE ADJUSTMENT (BENCH) FIG. 4
MOTE IF TIYWR-RES~STA~ CHOKE , m v r n D ] IS USED, IEYOVS CHORE COYER 4 N D C O I L A ~ Y B L I F O L L O W I N ( I IYIIRUCTIOWI bWCHOIES71TCOYER RETAIWERllT
THERMOSTATIC
OLOOS~NIHREE R C ~ N I W O SCREWS AND RSYOYIIHETIILRYOITATICCDYFR A m @PLACE 6AST #OLE CAM COlL A S I L Y I L I FROM C Y O l l HOUOING FOLLOWER ON WlOH STEP (SEE NOTE) OF FAST lDLE CAM
CHOKE COlL LEVER ADJUSTMENT
FIG. 5
@HIKE CHOIE CON LEVER AND FA- ~DLEADJUITYENT (BENCH ORON-TWS CAR OETTIIIG). NOT8 lF IAN-R-RESISTANT CHOKE (RIVETED1 IS USED. D O H O T R ~ I O Y C R I V E I I ANDCHOKECOVERTO PLIFORU 7HlS ADIU8TYEYI. USE RUBBER B1WD OW YACUUYBREAI ILEVEl7Al lGTOHOLDCWOIEVl lVECLDtED.
OW CHO1E COIL LEVER OR YICUUY @.EM LEVER TANG @ReUOYEGIUDs. IHOLO IN POSWION WITH RUBBER BAND).
CHOKE ROD (FAST IDLE CAM) RELATION ADJUSTMENT
FIG. 6
FAST IDLE CAM
C I M FOLLOWER CON0 STEP OF CAW
FAST IDLE CAM (CHOKE ROD) ADJUSTMENT
FIG. 7
* a.Cls"asrs Awo*L"e ELSE0
PUS" INI,DIC*OL.SO,, LEVER C 0 " " ~ ~ ~ ~ L O C X W,SS "WT,L,&WC ow OY.llOE ,EVER CONILCT. V.C""M n n n * R O O .UCKI ITSI .NT i.COU..ESS.D
VACUUM BREAK ADJUSTMENT (RICH SETTING)
FIG. 8
",""EST I n C Y Y U *PEAK ,Do
O S < A S , 8"LECfiM *orCoUsl /rsl B"CIIWT S P R # N S ,
1 REFER TO LABEL IN ENGINE COMPARTMENT FOR CORRECT TUNE-UP PROCEDURE AND SPECIFICATIONS
'Alternate Method Note: Angle Gauge Setting 36'. Plug Gauge ,225.'; After 22;500 Miles, Reset to 38'. or ,240" IMPORTANT: All Choke Measurements Are Made A t Top Edge Of Vs ve.
Fig. No.
pp
1
3
3
IDLE SPEED ADJUSTMENT
IC IDLE SPEED ADJUSTMENT
AST IDLE R.P.M.
CO, WD, 131,132:M,9X,9FR.9FD
I I
4
5
7
PRINTED I N U.S.A. 0 1 9 7 7 GENERAL MOTORS CORP.
Spec. 118
OUTER
11/32
SEE DECAL SEE DECAL
900.P Low Step
3 Turns
,120
,085
Fig. No. 1
3
3
17
l8
SEE
DECAL
4
5
7
spec.
118
OUTER 318
SEE DECAL
ZCAL 900-P LOW Step
3 Turns
,120
,090
Fig. No. 1
3
3
l7
1 8
SEE
DECAL
4
5
7
Spec. 11/32
INNER
114
SEE DECAL
goo-N LOW Step
3 Turns
,120
,075
Fig. No. 1
3
3
l7
SEE
DECAL
4
5
7
Spec. 11/32
OUTER 5116
SEE DECAL
1750-P 2nd Step
Fig. No. 1
. 3
3 Turns
,120
,075
5
7
l7
SEE
DECAL
SEE DECAL
1 7 5 0 . ~ 2nd step
l7
SEE
DECAL
BULLETIN: 9D-8S
DATE: NOVEMBER 1977 PAGE: 4
T O R M O O E L 1 M2ME I MZMC I M2MC I MZMC I MZMC I
ADJUSTMENT SPECIFICATIONS
ADJUSTMENT AND TUNE UP SPECIFICATIONS MODELS "2MC" - "MZMC" - "MZME" (DUALJET)