W-O CARTER CARBURETOR IDLE ADJUSTMENT SCREW FOR FORD GPA, GPW, WILLYS MB SLAT & MB
WO116174 - GPW9567
Carter carburettor idle adjustment screw for Ford GPA, GPW, Willys MB Slat & MB
Idle mixture adjustment screw
Idle mixture adjustment screw for the Carter WO carburettor. This screw regulates the fuel-air mixture during idling and is the only external adjustment screw on the Carter WO. Essential for correct engine tuning.
|
Application Carter WO carburettor |
Function Idle mixture adjustment |
|
Vehicle Ford GPA, GPW, Willys MB Slat & MB |
Part number WO-116174 / GPW-9567 |
Features
- External adjustment screw for idle mixture
- Only service adjustment on Carter WO carburettor
- Compensates for carbon deposits in carburettor
- Standard setting: 1 to 2 turns open from closed position
- Replacement part for worn or damaged screw
★ This idle adjustment screw is a replacement part for the Carter WO carburettor. According to TM 9-803, this is the only external adjustment on the carburettor.
Application
Ford GPA (amphibious jeep), Ford GPW, Willys MB (including Slat Grill), CJ-2A and CJ-3A with Carter WO carburettor (model numbers CAR-539S, WO-A1223, GPW-9510). Also M38 if adapted for Carter WO carburettor.
Installation notes
Standard adjustment per TM 9-803: turn screw fully clockwise (carefully, do not force against seat), then turn back 1 to 2 turns. Fine tuning with warm engine: adjust until engine idles smoothly at approximately 600 rpm. An incorrectly adjusted screw may cause rough idling or prevent the engine from starting.
Compatibility
Exclusively for Carter WO carburettors on Willys L-134 'Go Devil' engine. Not for Zenith or Solex carburettors. Note: when replacing jets from rebuild kits, settings may differ — original jets are preferable if in good condition.
Historical context
The Carter WO was the standard carburettor on WWII Willys MB and Ford GPW jeeps (1941-1945), as well as on the amphibious Ford GPA 'Seep' and early post-war CJ models. The idle adjustment screw was, according to Army documentation, the only external adjustment screw, enabling straightforward field maintenance.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
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This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
ALL_CATEGORIES : Carter - CJ2A, Carter - CJ3A, Carter M38, Carter - CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Ford GPW (early) | 1942 |
| Ford GPW | 1942, 1943, 1944, 1945 |
| Willys M38 | 1950, 1951, 1952 |
| CJ series | |
| Jeep CJ-2A | 1945, 1946, 1947, 1948, 1949 |
| Jeep CJ-3A | 1949, 1950, 1951, 1952, 1953 |
| Jeep CJ-3B | 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 |
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
