Section G-225 · Pages 15–18 (4 pages)

503 Engines: Holley 852-FFG (G-225)

From the 1950s GMC Holley Carburetor Spec Sheets

Holley 852-FFG carburetors for the GMC 503 engine in HC-640 and HC-850 trucks and the PGA-3301 military bus: R-626A, R-720A and R-925A, with governor control valve 79R-82A. Side-by-side specification columns show the differences in governor spring, spring post position and by-pass jets; engine specifications for the 503, exploded views and a parts list of 113 index numbers follow, including the automatic choke used on one version.

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What this section covers

  • Application data: R-626A, R-720A, R-925A
  • PGA-3301 military bus application
  • Carburetor specifications compared
  • Engine specifications for the 503
  • Exploded view and parts list
Year
1946, 1947, 1948, 1950, 1951, 1955, 1956, 1957, 1958
Make
GMC, Holley
Vehicle
Carburetors, Components and Systems, Trucks
Type
Parts Catalog, Specifications
Models
Holley 852-FFG, 885-JJG, AA-1, 1904-FS/HS, 4000-G, 4150-G; GMC 248 to 503, V-324 and V-370 engines
Publication
Form G-1 (contents, 6-57); sheets G-220 to G-250, G-4300, G-4325
Pages
80

What’s inside

Contents

  1. G-1Contents: Carburetors by EngineHolley's June 1957 index (Form G-1) lists each GMC carburetor part number with its catalog form, then tables by engine (248, 302, 318 and 360, V-324, 360, V-370, 426 and 503) giving vehicle series, Holley model and part number; page 2 lists 1946–1951 truck and coach carburetors and sandwich governors.pp. 1–2

Carburetor sheets

  1. G-220318 and 360 Engines: Holley 852-FFG (G-220)pp. 3–6
  2. G-2211955 360 Engine, Model 600: Holley 852-FFG (G-221)pp. 7–10
  3. G-223426 Engines: Holley 852-FFG (G-223)pp. 11–14
  4. G-225503 Engines: Holley 852-FFG (G-225)pp. 15–18
  5. G-2261955–57 503 Engine, 630-50 and 660-50 Series: Holley 885-JJG (G-226)pp. 19–22
  6. G-2271955 426 Engine, 620-42 and 630-42 Series: Holley 852-FFG and FFGC (G-227)pp. 23–26
  7. G-228503 Engine, 660 Series: Holley 852-FFG and FFGC (G-228)pp. 27–30
  8. G-230302 Engine: Holley AA-1 R-660A (G-230)pp. 31–34
  9. G-235302 Engine: Holley AA-1 R-855A and R-927A (G-235)pp. 35–38
  10. G-2371955 302 Engine, Cab Forward 500 Series: Holley AA-1 (G-237)pp. 39–42
  11. G-240248 Engine: Holley 1904-FS (G-240)pp. 43–46
  12. G-243270 Engine, 140 hp: Holley 1904-FS and 1904-HS (G-243)pp. 47–50
  13. G-2451955 V-324 Engine, 550 Series: Holley 852-FFG and FFGC (G-245)pp. 51–54
  14. G-2461956 V-324 Engine, 550 and 650 Series: Holley 4000-G (G-246)pp. 55–58
  15. G-2471957–58 V-370 Engine, 550 and 600 Series: Holley 4000-G (G-247)pp. 59–62
  16. G-248503 Engine: Holley 4150-G, Issue 1 (G-248)pp. 63–66
  17. G-248503 Engine, 630 and 650 Models: Holley 4150-G, Issue 2 (G-248)pp. 67–70
  18. M-2301960–62 Mercury and Comet Six: Holley 1904 and 1908 (M-230, misfiled)A Holley sheet bound into this set by mistake: Form M-230 (July 1962) for 1960–61 Comet 144 and 170 cubic inch and 1961–62 Mercury 223 cubic inch sixes with 1904 and 1908 carburetors, giving application data, kit numbers, specifications and a parts table.pp. 71–74
  19. G-250305A V6 Engine: Holley 1904-HS (G-250)Issue 1 (October 1959) of the sheet for the Holley 1904-HS R-1915A on GMC 1000 through V3500 models with the V6-305 engine: application data, specifications, bowl vent adjustment, exploded view and parts list.pp. 75–76

Governor sheets

  1. G-4300, G-4325Truck and Coach Sandwich Governors (G-4300 and G-4325)pp. 77–80

Other manuals for this vehicle