Best Car Carburetor Diaphragms of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 2, 2025

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Carburetor diaphragms are an essential component of the engine system in cars. These small, rubber membranes are responsible for controlling the flow of fuel and air into the carburetor. Without a properly functioning diaphragm, the engine may experience starting problems, poor performance, or even stall out completely. It's important to regularly inspect and replace carburetor diaphragms to ensure optimal engine performance and prevent potential damage. There are a variety of carburetor diaphragms available on the market, designed to fit specific makes and models of cars.

At a Glance: Our Top Picks

Holley 135-9 Diaphragm Cover #TOP 1
Holley 135-9 Diaphragm
ftb score rating icon 9.9
SeaEagles 135-10 30cc Diaphragm Cover #TOP 2
SeaEagles 135-10 30cc Diaphragm
ftb score rating icon 9.8
eMagTech Carburetor Diaphragm Kit Cover #TOP 3
eMagTech Carburetor Diaphragm Kit
ftb score rating icon 9.6

Top 10 Car Carburetor Diaphragms

#TOP 1

Holley 135-9 Diaphragm

135-9
No Color
50cc
Holley 135-9 Diaphragm Cover
Holley 135-9 Carburetor Diaphragm

The Holley Carburetor Diaphragm is an essential component for your vehicle's carburetor system. It plays a crucial role in regulating fuel flow, ensuring your engine runs smoothly and efficiently. By using this diaphragm, you can enhance the performance of your car, making it more responsive and reliable. Additionally, this product is designed for durability, providing you with a long-lasting solution to keep your carburetor in top shape. Overall, investing in the Holley Carburetor Diaphragm means you are prioritizing both performance and longevity for your vehicle.

What We Like
Improves fuel flow regulation
Enhances engine performance
Durable construction
Reliable and efficient
#TOP 2

SeaEagles 135-10 30cc Diaphragm

SeaEagles
QZ-135-10
SeaEagles 135-10 30cc Diaphragm Cover
SeaEagles 2Pieces135-10 Carburetor 30cc Accelerator Pump Diaphragm Fit For Holley 4150 4160 Carburetors | Replace To Holley 135-5, Holley 135-10 Holley 135-12 30cc Accelerator Pump Diaphragm

The SeaEagles 30cc Diaphragm is an essential replacement for your Holley carburetors. This kit ensures a precise fit with models like the Holley 2300 and 4150, making installation straightforward and hassle-free. You can expect reliable performance thanks to its high-quality materials, which contribute to its durability. With this diaphragm, you'll enjoy smoother operation and improved efficiency in your carburetor, enhancing your overall driving experience.

What We Like
Easy installation
Reliable performance
High-quality materials
Precise fit
#TOP 3

eMagTech Carburetor Diaphragm Kit

eMagTech
088-HOW
eMagTech Carburetor Diaphragm Kit Cover
eMagTech 4 Sets Carburettor Diaphragm Gasket Kit Lawnmower Carburetor Repair Diaphragm Compatible with Briggs & Stratton Engine 450 500 550 600 Series

The eMagTech Diaphragm Kit is designed for easy lawnmower carburetor repairs. Made from high-quality materials, these diaphragms offer excellent elasticity and durability, ensuring they perform well over time. This kit includes two diaphragms that fit various Briggs & Stratton engines, allowing you to choose the right one for your needs. You’ll appreciate how simple the replacement process is, as it requires no specialized tools. Remember to turn off your mower and disconnect the spark plug wire before starting. Once installed, you can quickly check that your carburetor is functioning properly, making your lawn care tasks more efficient.

What We Like
High-quality materials
Easy installation
Compatible with multiple models
Durable and elastic
#TOP 4

Holley Carburetor Diaphragm 135-12

135-12
30cc
Holley Carburetor Diaphragm 135-12 Cover
Holley 135-12 Carburetor Diaphragm

The Holley Carburetor Diaphragm is a crucial component for maintaining your vehicle's carburetor performance. This diaphragm ensures that fuel delivery is precise, helping your engine run smoothly. By replacing a worn-out diaphragm, you can enhance fuel efficiency and improve overall engine responsiveness. This product is designed for easy installation, making it convenient for you to handle repairs without needing professional help. With the Holley Carburetor Diaphragm, you can expect reliable performance and a longer lifespan for your carburetor system.

What We Like
Improves fuel efficiency
Enhances engine performance
Easy installation
Reliable and durable
#TOP 5

Holley 30Cc Carburetor Diaphragm

135-5
30 cc (Pack of 2)
Holley 30Cc Carburetor Diaphragm Cover
Holley Carburetor Diaphragm - 30Cc (Pack of 2)

The Holley Carburetor Diaphragm is designed for easy installation, making it a convenient choice for vehicle owners. With a 30 CC accelerator pump diaphragm, it ensures optimal performance of your carburetor system. Its durable black rubber construction means it can withstand wear and tear, providing long-lasting reliability. Being vehicle specific, this diaphragm fits perfectly, eliminating the hassle of compatibility issues. By choosing this product, you can enhance your vehicle's efficiency and enjoy smoother operation.

What We Like
Easy to install
Durable rubber material
Vehicle specific fit
Long-lasting performance
#TOP 6

ANTO Metering Diaphragm Assembly 95-526

ANTO Metering Diaphragm Assembly 95-526 Cover
ANTO 95-526 - A015006 - A015019 Metering Diaphragm Assembly for WA WT WY WZ Series ZAMA C1M C1U C1 C1S Carburetor with ZT-1 500-13 Metering Lever Adjustment Tools

The ANTO Metering Diaphragm Set is designed for compatibility with various Walbro and ZAMA carburetors. It features the 95-526 Metering Diaphragm Assembly, which enhances fuel efficiency in your engine, ensuring smooth operation. Additionally, the A015019 and A015006 assemblies cater to a wide range of ZAMA models, providing flexibility for different carburetor needs. The included 500-13-1 metering tool kit makes adjustments easier, allowing you to achieve optimal performance with minimal hassle. This comprehensive set not only saves time but also ensures your equipment runs at its best.

What We Like
Compatible with multiple carburetor models
Improves fuel efficiency
Includes adjustment tool kit
Comprehensive assembly set
#TOP 7

Raisman Carburetor Diaphragm for Tecumseh

Raisman Carburetor Diaphragm for Tecumseh Cover
Carburetor Diaphragm Compatible with Tecumseh Parts 630978 631069

The Raisman Carburetor Diaphragm is designed to work seamlessly with Tecumseh parts 630978 and 631069, ensuring compatibility with models like the 1400, 1500, AV520, H30, and LAV40. This means you can easily replace your old diaphragm without worrying about fit issues. The diaphragm plays a crucial role in regulating fuel flow, which helps your engine run smoothly and efficiently. By using this diaphragm, you can improve the performance of your Tecumseh engine, making maintenance a simpler task. Enjoy peace of mind knowing that you have a reliable part that enhances the overall functionality of your equipment.

What We Like
Compatible with multiple Tecumseh models
Ensures smooth engine performance
Easy replacement process
Enhances fuel flow regulation
#TOP 8

Honda Diaphragm

45520-MG7-006
Honda Diaphragm Cover
HONDA 45520-MG7-006 DIAPHRAGM

The Honda Diaphragm is a genuine Honda part designed to fit your specific vehicle. It is a high-quality diaphragm that is manufactured to meet the specifications for fit, form, and function. With its durable construction and precise design, this diaphragm ensures optimal performance and reliability. Whether you need to replace a worn-out diaphragm or want to upgrade your car's carburetor, the Honda Diaphragm is the perfect choice. It provides a seamless fit, ensuring that your carburetor functions properly and efficiently. With its genuine Honda quality, you can trust that this diaphragm will deliver excellent performance and durability.

What We Like
Genuine Honda part
High-quality diaphragm
Durable construction
#TOP 9

C·T·S Carburetor Diaphragm for B&S Series

C·T·S
0015140-X2
C·T·S Carburetor Diaphragm for B&S Series Cover
Carburetor Diaphragm Replaces B&S 272538 For 3-5 HP horizontal Pulsa-Jet engines (Pack of 2)

The C·T·S Carb Diaphragm is designed for use with B&S model series 133200, 135200, 136200, 91200, and 92220. This diaphragm is perfect for 3-5 HP horizontal Pulsa-Jet engines, ensuring optimal performance. By using this high-quality replacement part, you can restore the efficiency of your engine, leading to smoother operation. The package includes two diaphragms, giving you a convenient backup for future repairs. This is an essential component for maintaining your engine's functionality and prolonging its lifespan.

What We Like
High-quality replacement part
Fits multiple B&S models
Includes two diaphragms
Improves engine efficiency
#TOP 10

Timilge Vacuum Secondary Diaphragm Kit

135-11
Timilge Vacuum Secondary Diaphragm Kit Cover
Vacuum Secondary Pump Diaphragm Replacement for 390, 600, 750 CFM Carburetors 135-11 Rebuild Kit for 1850, 3310, 6619, 8007 Models

The Timilge Diaphragm Kit is designed for 390, 600, and 750 CFM carburetors, providing an essential replacement for worn-out diaphragms. This ensures that your carburetor's vacuum secondary functions efficiently, enhancing overall performance. With compatibility for various models, you can easily find the right fit for your needs. The kit includes a diaphragm check ball and auxiliary throttle plate, which help restore precision in your carburetor's operation. By using this kit, you can enjoy smoother acceleration and improved fuel efficiency, making your driving experience more enjoyable.

What We Like
Direct replacement for multiple models
Restores carburetor efficiency
Includes diaphragm check ball
Easy installation
Buying Guide Image

Frequently Asked Questions (FAQs)

1. How do you know if your carburetor diaphragm is bad?

A sign of a bad carburetor diaphragm is when the slide in a CV carburetor fails to lift when you open the throttle, resulting in the bike not pulling above approximately 3000 RPM. To check, remove the airtubes and observe if the slides lift.

2. Can you fix a carburetor diaphragm?

While carburetor diaphragms can be expensive to replace, around $60 each as they come integrated with the slide, they can be repaired easily and quickly. If one or more cylinders do not respond correctly to the throttle and carb synchronization becomes impossible, repairing the diaphragm may resolve the issue.

3. Does a carburetor have a diaphragm?

Yes, a carburetor contains a diaphragm. As the airflow in the chamber increases, the diaphragm moves outward, opening the needle valve to allow more fuel into the engine. This process helps the engine generate more power and maintains a steady fuel reservoir level.

4. How do you adjust a diaphragm carburetor?

To adjust a diaphragm carburetor, start with the L needle. Turn the needle clockwise while listening to the engine. The engine's speed will increase until it reaches the optimum point, the most efficient running point for the engine.

5. Which type of carburetor has a diaphragm?

The diaphragm carburetor is commonly used in various racing competitions, such as FIA Karting, including classes like OK, OKJ, OK-N, and OKJ-N. It is also used in one-brand championships like IAME Series, ROK Cup, and Easykart Trophy. This type of carburetor is compact and efficient for high-performance engines.

Editor's Notes

During our car carburetor diaphragm research, we found 24 car carburetor diaphragm products and shortlisted 10 quality products. We collected and analyzed 4,230 customer reviews through our big data system to write the car carburetor diaphragms list. We found that most customers choose car carburetor diaphragms with an average price of $13.05.

The car carburetor diaphragms are available for purchase. We have researched hundreds of brands and picked the top brands of car carburetor diaphragms, including Holley, SeaEagles, eMagTech, ANTO, Raisman. The seller of top 1 product has received honest feedback from 190 consumers with an average rating of 4.9.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.