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  5. Holley Idle Mixture Screws 16-27
Holley Idle Mixture Screws 16-27
Holley Idle Mixture Screws 16-27

Holley Idle Mixture Screws 16-27

Your Price: $4.95
Overall length = .929" Diameter at thread = .16" Thread count = 32. Compare overall length (prox) and the taper at the end.
Part Number: 16-27
Availability: In Stock

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Holley idle mixture screws.  Fits most Holleys.  Price is for 1 screw and you will need a set of 2. Fits all Holleys where the screw goes in the metering block on the side. Does not use a spring

SPECS:
  • Thread = 8-32
  • Overall length = .929"
  • Shaft = .8030"
Adjusting the Idle Mixture Screws

The idle mixture screws only affects idle. They simply control the amount of fuel and air mixture that is delivered at idle.

First run the screws in all the way until they seat, lightly. Too hard and you will damage the screw. Now back the screw out until the specified rpm is achieved. Turning the idle mixture screws clockwise (in) leans the idle mixture. Turning the idle mixture screws counter clockwise (out) richens the mixture.

Turn the mixture screws, alternating between the two in 1/4 turn at a time until the engine rpm starts to drop, then turn them back out 1/4 of a turn.


When adjusting your idle mixture screws doesn't seem to change the engine rpm much is an indication that there is something wrong and could be an indication of a needed rebuild.
APPLICATIONS:
You must match your carburetor number to get the correct part.
MAKE
YEAR
MODEL
CYLS
FORD MARINE
302
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
8
FORD MARINE
302" 5.0L 8CYL.
FORD MARINE
351
8
FORD MARINE
351" 5.7L 8CYL.
8
FORD MARINE
351" 5.7L 8CYL.
8
FORD MARINE
351" 5.7L 8CYL. (except R-9392A)
8
FORD MARINE
351" 5.7L 8CYL. R-9392A only
8
FORD MARINE
351" 5.8L 8CYL.
8
FORD MARINE
351" 5.8L 8CYL.
8
FORD MARINE
351" 5.8L 8CYL.
8
FORD MARINE
450 300 CFM
8
FORD MARINE
460" 7.5L 8CYL.
8
FORD MARINE
460" 7.5L 8CYL.
8
FORD MARINE
460" 7.5L 8CYL.
8
FORD MARINE
460" 7.5L 8CYL.
8
FORD MARINE
460" 7.5L 8CYL.
8
FORD MARINE
460" 7.5L 8CYL.
8
HOLLEY UNIVERSAL
HOLLEY UNIVERSAL
600 CFM (460" 7.5L FORD)
KIEKHAEFER MARINE
302, 351
8
KIEKHAEFER MARINE
302" 4.9L 8CYL.
8
KIEKHAEFER MARINE
351" 5.7L 8CYL.
8
MERCURY MARINE
302
MERCURY MARINE
351" 5.8L 8CYL.
8
MERCURY MARINE
351" 5.8L 8CYL.
8
MERCURY MARINE
351" 5.8L 8CYL.
8
MERCURY MARINE
MCM / MIE 215, 255, 255 W/302" 4.9L, 351" 5.7L 8CYL.
8
MERCURY MARINE
MCM / MIE 255 W/351" 5.8L 8CYL.
8
MERCURY MARINE
MCM/MIE 215, 225, 255 W/302, 351
8
OMC
235 W/351
8
OMC
235 W/351" 5.7L 8CYL.
8
OMC
351 5.8L
8
OMC
351" 5.8L 8CYL.
OMC
351" 5.8L 8CYL.
OMC
460" 7.5L 8CYL.
OMC
460" 7.5L 8CYL.
PALMER MARINE
302
8
PALMER MARINE
302, 351
8
PALMER MARINE
302, 351
8
PALMER MARINE
302, 351
8
PALMER MARINE
302" 5.0L 8CYL.
8
PALMER MARINE
351" 5.7L 8CYL.
8
PALMER MARINE
M345 W/345, 351, M392 W/392, 549
8
PALMER MARINE
M345 W/345" 5.6L 8CYL.
8
PALMER MARINE
M345 W/345" 5.6L 8CYL.
8
PALMER MARINE
M345 W/345" 5.6L 8CYL.
8
PALMER MARINE
M392 W/392" 6.5L 8CYL.
8
PLEASURE CRAFT
155, 165, 175, 185 W/302" 4.9L 8CYL.
8
PLEASURE CRAFT
215 W/302, 255 W/351
8
PLEASURE CRAFT
215 W/302" 4.9L 8CYL.
8
PLEASURE CRAFT
215 W/302" 4.9L 8CYL.
8
PLEASURE CRAFT
215 W/302" 4.9L 8CYL.
8
PLEASURE CRAFT
215 W/302" 4.9L 8CYL.
8
PLEASURE CRAFT
215 W/302" 5.0L 8CYL.
8
PLEASURE CRAFT
215 W/302" 5.0L 8CYL.
8
PLEASURE CRAFT
215 W/302" 5.0L 8CYL.
8
PLEASURE CRAFT
215 W/302" 5.0L 8CYL.
8
PLEASURE CRAFT
215 W/320" 5.0L 8CYL.
8
PLEASURE CRAFT
215 W/320" 5.0L 8CYL.
8
PLEASURE CRAFT
215 W/320" 5.0L 8CYL.
8
PLEASURE CRAFT
255 W/351" 5.8L 8CYL.
8
PLEASURE CRAFT
255 W/351" 5.8L 8CYL.
8
PLEASURE CRAFT
255 W/351" 5.8L 8CYL.
8
PLEASURE CRAFT
255 W/351" 5.8L 8CYL.
8
PLEASURE CRAFT
255 W/351" 5.8L 8CYL.
8
Click on Carb Number For Associated Parts.
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