Accelerator Pump Discharge Nozzles Each nozzle includes two gaskets. Used on 4150, 4160, 4165, 4175 and 4500 series carburetors. Straight type and Tube type nozzles were originally used on models 4150, 4160 and 4500. Anti-Pullover style nozzles, originally used on production 4165 and 4175 models, were engineered to combat “pump pull-over”, which occurs when the flow of air over the nozzles pulls fuel from the nozzle.
Double Pumper Tuning/Calibration Kit HLY36-182 Ideal for trackside tuning. Contains: four each of eight different metering jets from 70-84; two 35 pump nozzles; two 37 pump nozzles; one 35 power valve; one 45 power valve; one 50 power valve; twelve metering block gaskets; twelve fuel bowl gaskets; plus miscellaneous pump shooter, power valve and fuel bowl screw gaskets. 4150/4500 Dominator HP Air Bleeds Replaceable air bleeds are used in the idle, intermediate and
Straight Type Part No. HLY121-118 HLY121-121
Tube Type Part No.
Anti-Pullover Part No.
Hole Size
.018" .021" .025" .028" .031" .032" .035" .037" .040" .042" .045" .047" .050"
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Straight Type
HLY121-125 HLY121-25 HLY121-225 HLY121-128 HLY121-28 HLY121-228 HLY121-131 HLY121-31 HLY121-231
high speed circuits of model 4150 and 4500 Dominator HP carburetors. Bleeds have 10-32 UNF threads and are sold in packs of ten.
Tube Type Anti-Pullover Type
HLY121-132
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HLY121-135 HLY121-35
HLY121-137 HLY121-37 HLY121-237 HLY121-140 HLY121-40 HLY121-240
Hole Size
Hole Size
Hole Size
HLY121-142 HLY121-42 HLY121-145 HLY121-45
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Part No.
Part No.
Part No.
HLY126-23-10 .023" HLY126-24-10 .024" HLY126-25-10 .025" HLY126-26-10 .026" HLY126-27-10 .027" HLY126-28-10 .028" HLY126-29-10 .029" HLY126-30-10 .030" HLY126-31-10 .031" HLY126-32-10 .032" HLY126-33-10 .033" HLY126-34-10 .034" HLY126-35-10 .035" HLY126-36-10 .036"
HLY126-37-10 .037" HLY126-38-10 .038" HLY126-39-10 .039" HLY126-40-10 .040" HLY126-41-10 .041" HLY126-43-10 .043" HLY126-45-10 .045" HLY126-47-10 .047" HLY126-49-10 .049" HLY126-51-10 .051" HLY126-53-10 .053" HLY126-55-10 .055" HLY126-57-10 .057" HLY126-59-10 .059"
HLY126-61-10 .061" HLY126-63-10 .063" HLY126-65-10 .065" HLY126-67-10 .067" HLY126-69-10 .069" HLY126-70-10 .070" HLY126-71-10 .071" HLY126-72-10 .072" HLY126-73-10 .073" HLY126-74-10 .074" HLY126-75-10 .075" HLY126-76-10 .076" HLY126-77-10 .077" HLY126-78-10 .078"
HLY121-147 HLY121-150
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Accelerator Discharge Screws HLY121-7 Hollow design screws have 12-28 threads and are designed for use with .040"-up nozzle sizes. Accelerator Pump Tuning Kit HLY36-184 Kit includes a variety of diaphragms, pump nozzles, pump cams and related hardware for Holley carburetors. Accelerator Pump Diaphragms Available in rubber, or GFLT which is compat- ible with all alcohol base fuels.
Air Bleed Assortment Kit HLY36-240 Emulsion Jets Jets include 6-32 UNF thread. Part No. Hole Size
Rubber Part No. HLY135-5 HLY135-7
GFLT Part No.
Description
30cc 50cc
HLY135-10 HLY135-9
HLY142-20 .020" HLY142-31 .031" HLY142-40 .040"
Accelerator Pump Check Valve HLY26-41 50cc Accelerator Pump Conversion Kit HLY20-11 Kit more than doubles the capacity of accelerator pump system on Holley four barrel carburetors. Accelerator Pump Cam Assortment HLY20-12 Tailor pump performance to individu- al engine requirements by selecting the proper cam. Accelerator Pump Arms Part No. Description HLY20-78 Models 2300/4150/4160, Plastic HLY20-114 30cc Pumps, Metal
Quick Change Diaphragm Housing HLY20-59 For applications without vacuum balance tube.
Secondary Diaphragm Spring Kit HLY20-13 Kit contains seven color coded springs ranging from light to heavy load.
HLY20-78
Vacuum Cap Assortment HLY26-105 Kit includes a variety of different sized vacuum caps.
HLY20-114
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