Best Car Carburetor Diaphragms of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 7, 2026

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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

Dorman HELP! 90082 Accelerator Diaphragm Cover #TOP 1
Dorman HELP! 90082 Accelerator Diaphragm
ftb score rating icon 9.9
ZUDKSUY 10PCS Carburetor Metering Diaphragm for STIHL C1Q Series Cover #TOP 2
ZUDKSUY 10PCS Carburetor Metering Diaphragm for STIHL C1Q Series
ftb score rating icon 9.8
CARBBIA Carburetor Metering Diaphragm for Walbro WA WT WY WZ Series Cover #TOP 3
CARBBIA Carburetor Metering Diaphragm for Walbro WA WT WY WZ Series
ftb score rating icon 9.6

Top 10 Car Carburetor Diaphragms

#TOP 1

Dorman HELP! 90082 Accelerator Diaphragm

90082
Black
Dorman HELP! 90082 Accelerator Diaphragm Cover
Dorman HELP! 90082 Accelerator Diaphram

The Dorman Accelerator Diaphragm is a reliable relay part designed to help your car’s carburetor function smoothly. Weighing just 0.023 kilograms, it’s lightweight, making it easy for you to handle and install. Its compact size, measuring about 4.1 cm by 4.6 cm by 14.0 cm, allows it to fit neatly in your vehicle without taking up much space. Made in China, this part carries the trusted Dorman brand, known for quality automotive components. With this diaphragm, you can expect better control and performance from your carburetor, helping your vehicle run efficiently.

What We Like
Lightweight design
Compact dimensions
Trusted brand
Reliable relay function
#TOP 2

ZUDKSUY 10PCS Carburetor Metering Diaphragm for STIHL C1Q Series

Metering Diaphragm
ZUDKSUY 10PCS Carburetor Metering Diaphragm for STIHL C1Q Series Cover
ZUDKSUY 10PCS Metering Diaphragm Replacement Carburetor Metering Diaphragm Assembly for Small Engine Carburetors, Compatible with Zama A015053, Compatible with STIHL FS38 BG55 SP81 C1Q series

The ZUDKSUY Carburetor Diaphragms come in a pack of 10, giving you plenty of replacements to keep your small engine running smoothly. These diaphragms are designed specifically for STIHL models like FS38, FS75, and BG55, ensuring a perfect fit for your equipment. Made from durable materials, they resist damage and wear, so you don’t have to worry about frequent replacements. Plus, their compatibility with various C1Q-series carburetors means you can trust these parts to work well with your engine, helping maintain its performance and reliability.

What We Like
10-piece replacement set
STIHL model compatibility
Durable material quality
Fits multiple carburetor types
#TOP 3

CARBBIA Carburetor Metering Diaphragm for Walbro WA WT WY WZ Series

685219
CARBBIA Carburetor Metering Diaphragm for Walbro WA WT WY WZ Series Cover
CARBBIA 95-526 15Pcs Carburetor Metering Diaphragm Assembly with 4Pcs Fuel line Compatible with Walbro WA WT WY WZ Series Carburetor 95-526-8 95-526-9

The CARBBIA Carburetor Diaphragm is designed as a replacement for part numbers 95-526, 95-526-8, and 95-526-9, ensuring you get the right fit for your carburetor. It works with Walbro WA, WT, WY, and WZ series carburetors, so you can be confident it suits your specific equipment. The package includes 15 metering diaphragm assemblies and 4 fuel lines, giving you plenty of parts for repairs or maintenance. Before buying, make sure to check the pictures and compatibility details to confirm it matches your vehicle, helping you avoid any installation issues.

What We Like
Compatible with Walbro WA WT WY WZ
Includes 15 diaphragm assemblies
Comes with 4 fuel lines
Replaces multiple part numbers
Clear compatibility guidance
#TOP 4

SeaEagles 135-10 30cc Diaphragm

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 5

EATAKWARD 4505-050 Carburetor Primer Diaphragm Cover

4505-050
silver
standard
EATAKWARD 4505-050 Carburetor Primer Diaphragm Cover Cover
EATAKWARD 4505-050 Carburetor Primer Diaphragm Cover with Cleaner Tool Kit, Replacement for Suzuki ALT 125 LT 125 ALT185 Quadrunner 1983-1987, Replaces 4505-050

The EATAKWARD Carburetor Primer is designed to fit several Arctic Cat and Suzuki ATV models, making it a versatile replacement part for your vehicle. Made from durable materials, this primer offers strong resistance to wear and corrosion, ensuring it lasts through extended use. Installing this part can improve your engine’s fuel delivery, helping your ATV start more easily and run more efficiently. Plus, it’s designed for easy installation, so you won’t need special tools or expertise, saving you time and effort during maintenance. Overall, this product enhances your ATV’s performance and reliability with minimal hassle.

What We Like
Wide vehicle compatibility
Durable, corrosion-resistant material
Improves engine starting
Easy installation
#TOP 6

Trucktok Vacuum Secondary Pump Diaphragm 135-11 for 390-750 CFM Carburetors

CRRK14
Trucktok Vacuum Secondary Pump Diaphragm 135-11 for 390-750 CFM Carburetors Cover
Trucktok 135-11 Vacuum Secondary Pump Diaphragm Replacement for 390 600 750 CFM Carburetor Rebuild Kit Accessory Compatible with 1850 3310 6619 8007

The Trucktok Vacuum Diaphragm is designed to fit a range of carburetors, including 390, 600, and 750 CFM models, ensuring compatibility with many popular parts like 1850 and 3310. This replacement part helps you keep your vacuum secondary pump working smoothly by swapping out worn diaphragms, which can improve your carburetor’s performance. It comes with a diaphragm check ball and an auxiliary throttle plate, which help regulate airflow more accurately, so your engine runs better. With a rod length of just over 2 inches, this part is easy to install and a convenient way to restore your carburetor’s efficiency.

What We Like
Wide carburetor compatibility
Restores diaphragm function
Includes check ball and throttle plate
Improves regulator accuracy
Compact, easy-to-install size
#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

Hipa A015019 Carburetor Diaphragm Assembly for ZAMA Models

4316506992
Hipa A015019 Carburetor Diaphragm Assembly for ZAMA Models Cover
Hipa A015019 Metering Diaphragm Assembly for ZAMA C1M-W26 C1M-W26C C1M-W47 C1M-EL35 C1M-FR1 C1U-K39A C1Q-K73 C1U-K41A C1U-K81A Carburetor Pack of 20

The Hipa Carburetor Diaphragms are designed as a reliable replacement part, identified by the manufacturer part number A015019, ensuring you get the exact fit needed for your carburetor. These diaphragms are compatible with a wide range of ZAMA models, including the C1M-EL35, C1M-FR1, and several variations of the C1M-W26 series, making them versatile for many applications. With a pack of 20 diaphragms, you’ll have plenty of spares on hand, which is convenient for ongoing maintenance or repairs. This product is backed by a promise of perfect service, giving you confidence and support if any questions arise during your purchase or use.

What We Like
Exact replacement fit
Wide model compatibility
Bulk pack of 20 pieces
Reliable customer support
#TOP 9

HY-SPEED PCV Diaphragm Repair Kit for Audi and VW

06H103495AC
917-064
HY-SPEED PCV Diaphragm Repair Kit for Audi and VW Cover
HY-SPEED PCV Diaphragm Repair Kit Compatible with 2005-2017 A3 A4 A5 A6 A7 Quattro allroad Beetle CC Eos Golf City R SportWagen GTI Jetta Passat Rabbit Tiguan Replaces 917-064

The HY-SPEED PCV Repair Kit is designed to fit various Audi and Volkswagen models from 2005 to 2017, including popular series like A3, A4, A5, A6, and more. Before purchasing, you should confirm your vehicle's year and model to ensure compatibility, which helps you avoid installation issues. This kit replaces several OEM part numbers, making it easier for you to find the right fit without confusion. Additionally, the product comes with a 12-month warranty, providing peace of mind and support if you encounter any problems during use.

What We Like
Wide model compatibility
OEM part number replacements
12-month warranty
Easy vehicle fit confirmation
#TOP 10

Ensun PCV Diaphragm Repair Kit for Audi Volkswagen

917-064
Ensun PCV Diaphragm Repair Kit for Audi Volkswagen Cover
Ensun PCV Diaphragm Repair Kit with PCV Membrane Replaces 917-064

Ensun PCV Diaphragm Repair Kit is a direct replacement for a proper fit and easy installation. It fits 2005-2017 Audi Volkswagen models and restores the emission system to proper operation and performance. Each component is constructed from high-quality materials for durability and maximum service life, meeting or exceeding OEM standards. The product is 100% tested before shipping. The replacement OEM part numbers are provided for convenient reference. Ensun offers a 12-month warranty, giving a truly worry-free shopping experience.

What We Like
Durable and long-lasting
Easy to install
Restores emission system to proper operation and performance
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 5,888 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 $12.21.

The car carburetor diaphragms are available for purchase. We have researched hundreds of brands and picked the top brands of car carburetor diaphragms, including Dorman, ZUDKSUY, CARBBIA, SeaEagles, EATAKWARD. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

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.