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Carburetor Parts by Carburetor Types
Rochester Carburetor Parts
2G, 2GC, 2GV, 2 Jet 2 Barrel Carburetor Parts
2 Jet Accelerator Pumps
Rochester 2 Barrel Carburetor Accelerator Pump 2.590 x 21/32" - AP427
Rochester Accelerator Pump 2.590 x 21/32" - AP427
Rochester 2 Barrel Carburetor Accelerator Pump 2.590 x 21/32" - AP427
19
Review(s)
5
0
5
Your Price:
$12.95
2.590 x 21/32
Part Number:
AP427
Availability:
In Stock
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Recommended Add Ons. Total is updated in your Cart.
Accelerator Pump Return Spring 66-15
$4.25
Holley & Rochester Delayer Spring - 66-44
$3.95
Accelerator Pump Delayer Retainer 85-93
$1.95
Accelerator Pump Bore Polishing Crocus Cloth CC2
$4.95
Ethanol Defense ED16
$19.25
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Description
Customer Reviews
Rochester 2 jet, 2 barrel carburetor ethanol ready accelerator pump.
FEATURES:
US manufactured
Ethanol ready
SPECS:
Overall length = 2.590" (when fully extended)
Cup diameter = 21/32"
Stem length = 2.04"
TECHNICAL:
apply a couple dabs of white lithium grease to the cup before installing
do not
soak pump
polish the pump bore with Crocus Cloth before installing pump
do not
allow your pump to dry out
FITS SOME:
Rochester 2G, 2GC, 2GV
APPLICATIONS:
You must match your carburetor number to get the correct part.
MAKE
YEAR
MODEL
TYPE
BUICK
1966-67
225 3.7L
2 JET
BUICK
1966-69
300" 4.9L, 340" 5.6L, 350" 5.7L (Inc Repl Carbs)
2 JET
CADILLAC
1958-60
CENTER OF 3
2 JET
CHECKER
1964
283”
2 JET
CHECKER
1965
327 W/VAC GOV
2 JET
CHECKER
1967-68
283, 327
2 JET
CHEVROLET
1955-61
(INCL CENTER OF 3 CARBS)
2 JET
CHEVROLET
1958-69
283, 302, 307, 327
2 JET
CHEVROLET/GMC TRUCK
1955-68
265, 322, 327, 348 (INC GOV)
2 JET
CHEVROLET/GMC TRUCK
1958-69
283, 307 INC REPL CARBS
2 JET
OLDSMOBILE
1955
2 JET
OLDSMOBILE
1957-58
TRUE TRI POWER
2 JET
PONTIAC
1955-57
2 JET
PONTIAC
1957-65
389, 421 HP (CENTER OF TRUE TRIPOWER)
2 JET
PONTIAC
1958-68
283, 307, 327 (CANADA)
2 JET
REO/WHITE
1967
327 W/ VAC GOV
2 JET
STUDEBAKER
1965
283
2 JET
CARBURETOR NUMBERS:
17051989
17051990
17051991
17052518
17052519
17052520
17052521
17054600
17054621
17054622
17054649
17054656
17054657
7005810
7006100
7006770
7006825
7006970
7007171
7008004
7008005
7008383
7008387
7008388
7008389
7008393
7008394
7008399
7008695
7008696
7008706
7008930
7008931
7008936
7009345
7009907
7009908
7010647
7010648
7010649
7010716
7010717
7010718
7010719
7010750
7010958
7010959
7010960
7011131
7011132
7011135
7011143
7011149
7011155
7011224
7011350
7011460
7011500
7011706
7011709
7011712
7011713
7011714
7011952
7012035
7012047
7012133
7012147
7012202
7012205
7012233
7012450
7012451
7012452
7012453
7012455
7012457
7012500
7012503
7012902
7012905
7012913
7013007
7013008
7013009
7013011
7013013
7013016
7013018
7013020
7013026
7013034
7013037
7013064
7013067
7013082
7013353
7013652
7013974
7015015
7015017
7015019
7015066
7015068
7015076
7015852
7016007
7016215
7016312
7016559
7016604
7016605
7016606
7016710
7016716
7016805
7016905
7016911
7016912
7016917
7019007
7019008
7019018
7019064
7019067
7019069
7019082
7020007
7020008
7020018
7020064
7020067
7020069
7020109
7023007
7023008
7023009
7023010
7023018
7023022
7023027
7023073
7023075
7023077
7023161
7023162
7024074
7024075
7024100
7024101
7024102
7024106
7024108
7024110
7024112
7024173
7024175
7024183
7024186
7025070
7025074
7025075
7025082
7025088
7025089
7025103
7025173
7025175
7025177
7026046
7026047
7026144
7026145
7026146
7026147
7027040
7027041
7027042
7027044
7027045
7027046
7027049
7027100
7027101
7027103
7027105
7027106
7027110
7027112
7027114
7027116
7028100
7028101
7028103
7028105
7028106
7028107
7028110
7028111
7028112
7028125
7028127
7028140
7028141
7028184
7028185
7029101
7029103
7029105
7029107
7029108
7029110
7029112
7029125
7029140
7029141
7036046
7036048
7036099
7036100
7036101
7036103
7036105
7036110
7036112
7036144
7036146
7036248
7037034
7037044
7037080
7037100
7037101
7037103
7037105
7037110
7037112
7040081
7040083
7041369
7041374
7041834
7041835
7041836
7043183
7046653
Rating Snapshot
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4 Stars
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3 Stars
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Average Customer Ratings
4.9
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Hard to find accelerator pump
This is a hard to find accelerator pump. It fits 55 to 58 GM Rochester 2bbl carbs found on most V8 cars, including factory Tri-Power. The pump provided in most rebuild kits are WRONG, they are the 3/4" pump and will fit too tight in the pump bore of these carb. This pump is the correct size (21/32") and fits perfect.
Did you find this helpful?
5 of 5
Found Helpful
Reviewed by:
Stu
from St. Louis, Mo. on 10/12/2014
5
Acc. Pump
The pump that came with the carb did not have the internal pump cup spring. This replace did and made a huge difference in my accelleration.
Did you find this helpful?
2 of 2
Found Helpful
Reviewed by:
Timothy Falaschi
from Racine on 9/11/2017
5
PARTS MANAGER
5 STARS TO MIKE'S CARBUERATOR PARTS ALWAYS A GREAT EXPERIENCE
Did you find this helpful?
1 of 1
Found Helpful
Reviewed by:
BILL SIMS
from MIDDLETOWN on 12/7/2020
5
Rochester accelerator pump
Thanks Mike for prompt delivery of this part. It came just in time to get my boat going before long weekend. It fit and worked perfectly. Peter H.
Did you find this helpful?
1 of 1
Found Helpful
Reviewed by:
Peter H.
from Oakville,ON on 7/29/2020
5
AP427
Rebuilding my old 2 Jet for the third time in ten years. This is the first time using the correct accelerator pump assembly, all others were kit components. I always had a stumble under slight acceleration, no more, now it’s fine all around. Thanks Mike for the great rebuild video and the “sudden service” getting the part to me !! I would recommend Mike’s to everyone.
Did you find this helpful?
1 of 1
Found Helpful
Reviewed by:
Dave Emery
from Florida on 5/27/2020
5
Accelerator Pump
Hello Mike, Unfortunately this pump did not work out for me. I have an early Rochester 2CG on my 1955 Chevy. After doing more research I found that the early Rochester's take a different accelerator pump. The fuel flows into the pump well through the accelerator pump it self, not a channel underneath. Therefore I needed a pump which allowed the fuel to flow through and had a check ball inside. I was able to get one from a supplier on the east coast. Possible you could do an update on you YouTube videos to make mention of these differences as I find there are many who suffered from the same problem that I did. Thanks
Did you find this helpful?
1 of 1
Found Helpful
Reviewed by:
Brian Janke
from St. Albert , Alberta on 5/16/2019
5
COO
As described
Did you find this helpful?
Reviewed by:
David
from Manassas VA on 9/18/2023
5
Working Perfectly
Thank you for the follow up. The part was exactly what I was looking for because it came with a garter spring already installed. I had purchased two others elsewhere that did not have the garter spring and they failed almost immediately. So far it’s working perfectly.
Did you find this helpful?
Reviewed by:
RF
from NA on 9/6/2022
5
happy Customer
Received product as advertised and it was what I needed
Did you find this helpful?
Reviewed by:
Andy Sanchez
from Texa on 5/18/2020
5
accelerator pump
customer service and turn around are top notch
Did you find this helpful?
Reviewed by:
WR Story
from Mission Viejo on 1/24/2019
5
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