Holley 1940 Carburetor Rebuild Kit AMC, Ford, Jeep, Mercury K1138

Frequently Asked Questions – K1138 Holley 1940 Carburetor Rebuild Kit

1. Which carburetor does the K1138 kit fit?
The K1138 kit is designed exclusively for Holley 1940-series carburetors, popular in older AMC, Ford (including agriculture) Hobart and Jeep vehicles. Please confirm your carb model before ordering. Kits fit the carb number not the application.

2. What components are included in this rebuild kit?
The comprehensive kit includes:

• Viton-tipped needle & seat

• Accelerator pump cup - ethanol resistant

• Float bowl gaskets & O-rings

• Check balls

• Pre-cut gaskets and seals

• Power jet

It's everything needed to refurbish the fuel and accelerator pump circuits in a 1940 carb.

3. Is the kit compatible with ethanol-blended fuels?
Yes—this kit uses Viton and modern gasket materials that resist degradation from E10/E15 fuels commonly used today.

4. Does the kit come with a float?
No, the float is not included. The Holley 1940 cartridge-style float must be purchased separately.

5. Are installation instructions provided?
Absolutely. A free electronic rebuild manual is featured on the product page, offering step-by-step guidance and tuning specifications.

6. How can I verify this kit fits my carburetor?
Check for the "1940" carb number on your Holley carburetor. If your carb number is stamped as 1940, this kit is a direct fit as long as you match the carb number r-xxxx

7. What performance improvements will this kit provide?
An updated accelerator pump cup, fresh needle/seat, and new seals all help restore crisp throttle response, consistent acceleration, and eliminate fuel leaks or idle issues.

8. Is this product available now?
Yes. The K1138 kit is usually listed as In Stock under the price. Inventory status is updated in real time.

9. When will my order ship?
Orders placed before 12 PM PST (Monday–Friday) are shipped the same day. Those placed later ship the next business day.

10. How is shipping calculated?
Shipping charges depend on your address and chosen method. Visit our [Shipping Information Page] for full rate details.

11. How does the K1138 kit compare to others on the market?
This is a Made-in-the-USA kit with high-quality Viton and ethanol-resistant parts—far superior to generic or NOS kits that may degrade with today’s fuel blends.