Description
Product Overview
The Trucktok CRRK14 vacuum secondary diaphragm is engineered to replace worn or damaged diaphragms in a wide range of carburetor models. Constructed from a high‑grade machined alloy, the diaphragm offers a rigid yet flexible surface that accurately transfers vacuum pressure throughout the carburetor system. Its dimensions—rod length of 2.054 inches and a compact package measuring 2.76 x 2.01 x 1.54 inches—make it an exact fit for 390, 600 and 750 CFM carburetors, including part numbers 1841849, 1850, 3310, 6619, 6909, 8007, 80457, 80463, 80508, 80529, and 9834. The part carries the manufacturer number CRRK14‑KIT and replaces part numbers 135‑2, 135‑4, and 135‑11. With a weight of just 0.634 ounces, the diaphragm is lightweight yet robust, ensuring long‑term durability while minimizing added mass to the engine assembly. The design incorporates a built‑in check ball and an auxiliary throttle plate, providing additional control over the vacuum flow and helping to fine‑tune the regulator for optimal performance.
![[Product front view showing all components]](https://www.keenfinds.store/wp-content/uploads/2026/06/954dbee2cc804b7397794dc44d4bcc96.jpg)
Usage
This diaphragm is ideal for automotive enthusiasts, small‑engine repair technicians, and anyone who maintains classic or performance vehicles that rely on precise carburetor tuning. It is particularly valuable in applications where the carburetor must deliver consistent fuel‑air mixtures under varying load conditions, such as racing, off‑road driving, or heavy‑duty work trucks. Installation is straightforward: remove the existing diaphragm, clean the mounting surface, and install the new CRRK14 unit using the supplied check ball and throttle plate. The part is compatible with both gasoline and diesel‑derived engines that use the listed carburetor models, making it a versatile solution for a broad spectrum of vehicles. Regular maintenance of the vacuum system, including periodic diaphragm replacement, helps prevent lean or rich running conditions, reduces engine wear, and improves fuel efficiency.
Why Choose Us
Trucktok has built a reputation for delivering high‑quality replacement components that meet or exceed OEM specifications. Each CRRK14 diaphragm undergoes rigorous quality control testing, including dimensional verification, material hardness checks, and functional vacuum performance assessments. The machined exterior finish not only provides a precise fit but also resists corrosion and wear, extending the service life of the part. Our customers benefit from a responsive support team that can assist with fitment questions, installation guidance, and warranty claims. With a 4.1‑star rating from over 50 verified buyers, the CRRK14 has proven its reliability in real‑world applications. We also offer a hassle‑free return policy, ensuring that you can purchase with confidence knowing that any issues will be addressed promptly.
Key Features
- Precision‑machined alloy construction for a perfect fit and long‑lasting durability.
- Compatible with a wide range of 390, 600 and 750 CFM carburetor models, reducing the need for multiple spare parts.
- Integrated check ball and auxiliary throttle plate enhance vacuum regulation and engine responsiveness.
- Lightweight design minimizes added mass while maintaining structural strength for demanding engine cycles.
- Backed by dedicated customer support and a clear warranty, ensuring peace of mind after purchase.
FAQ
What carburetor models are compatible with the CRRK14 diaphragm?
The CRRK14 fits carburetors rated at 390, 600 and 750 CFM, including part numbers 1841849, 1850, 3310, 6619, 6909, 8007, 80457, 80463, 80508, 80529, and 9834. It also replaces part numbers 135‑2, 135‑4, and 135‑11.
How do I install the secondary diaphragm?
First, remove the existing diaphragm and clean the mounting surface. Position the new CRRK14 diaphragm, ensuring the check ball and auxiliary throttle plate are correctly seated. Secure the diaphragm according to the carburetor’s service manual, typically using the original fasteners. Verify vacuum operation before re‑assembling the carburetor.
Will this part improve my engine’s performance?
Yes. By restoring accurate vacuum control, the CRRK14 helps maintain the correct fuel‑air mixture, which can lead to smoother idle, better throttle response, and improved fuel efficiency, especially in high‑performance or heavily loaded applications.
Is the CRRK14 diaphragm covered by a warranty?
Trucktok provides a limited warranty that covers manufacturing defects for a period of one year from the date of purchase. Contact our support team with your order details for assistance.
Can I use this diaphragm in diesel engines?
The diaphragm is designed for carbureted engines, which are commonly found in gasoline‑powered vehicles. While some diesel‑derived small engines use similar carburetor designs, we recommend confirming compatibility with the engine manufacturer before installation.
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