Best Carb Cleaner Spray for Carburetors and Throttle Bodies

#1 · Best Overall

1. Gumout Carb & Choke Jet Spray

• Volume: 28 fluid oz
• Size: 14 Fl Oz (Pack of 2)
• Form: Aerosol

Best for: Hard-to-reach carb passages.

Why it ranks #1: Two 14-ounce cans provide 28 ounces total; the jet spray reaches hard-to-access passages, and the formula is listed as residue-free for unpainted metal parts.

Gumout’s powerful jet-spray action reaches hard-to-access carburetor passages, helping clear deposits without leaving residue behind. The two 14-ounce cans suit buyers who want cleaner for internal carburetor work as well as unpainted metal components such as linkages, chokes, and throttle plates.

The jet spray is specified to blast gum, varnish, carbon, oil, grease, and sludge from inside and outside the carburetor, supporting cleanup of buildup that can interfere with engine response. Fast-drying solvents leave no residue, so treated passages do not retain an oily film after cleaning. The formula also applies to unpainted metal parts, including PCV valves, manifolds, and brake components, making the two-can pack useful across several maintenance tasks. It is not described for painted surfaces.

Skip it if you need a cleaner explicitly described for painted surfaces; Gumout lists unpainted metal parts as its application range.

Choose this Gumout pack for carburetor passages and related unpainted metal parts when jet delivery and residue-free drying matter. Its two cans support repeat maintenance, but the stated cleaning range does not include painted components.

Listed on Amazon as: Gumout Carb & Choke Jet Spray Carburetor Cleaner, Pack of 2

#2 · Largest Single Can

2. Berryman B-12 Cleaner

• Volume: 20 fluid oz
• Size: 20 oz (Pack of 1)
• Form: Aerosol

Best for: Large-can carb and throttle cleaning.

Why it ranks #2: Its 20-ounce aerosol is the largest listed single can and targets carburetors, chokes, and throttle bodies; the formula is described as non-chlorinated.

Berryman B-12 offers a 20-ounce aerosol with an extension tube, pairing a comparatively large listed volume with a way to direct cleaner into components. It targets gum, varnish, sludge, and carbon in carburetors, chokes, and throttle bodies to support airflow and engine performance.

The extension tube helps direct the aerosol toward carburetor, choke, and throttle-body areas rather than relying only on broad spray. Its deposit list includes gum, varnish, sludge, and carbon, buildup the product says can affect airflow and engine operation. Berryman also states that cleaning can help with cold starts, rough idling, stalling, and hesitation. The formula is described as non-chlorinated and safe for oxygen sensors and catalytic converters, offering compatibility details for equipped vehicles.

Skip it if you need a product without an extreme-flammability warning; Berryman’s supplied safety information flags that hazard.

Berryman suits buyers who want a large aerosol and extension tube for carburetor, choke, or throttle-body deposits. Its stated sensor and converter compatibility is useful, but the flammability and eye-irritant warnings matter.

Listed on Amazon as: Berryman B-12 Carburetor, Choke and Throttle Body Cleaner – 20 oz (Pack of 1)

#3 · Dual-Action Spray

3. WD-40 Specialist Cleaner

• Volume: 13.5 fluid oz
• Size: 1 Count (Pack of 1)
• Form: Spray

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Best for: Carburetor and throttle-body work.

Why it ranks #3: The 13.5-ounce aerosol combines a solvent that breaks up baked-on carbon with a spray that blasts deposits away from carburetors and throttle bodies.

WD-40 Specialist combines solvent cleaning with a powerful spray that blasts away loosened deposits, giving buyers two actions in one carburetor and throttle-body cleaner. The formula is also listed for unpainted metal parts, so it can cover adjacent component-cleaning tasks in one maintenance session.

The solvent breaks up tough, baked-on carbon, while the spray removes deposits and waste; together, those steps address both loosening and clearing residue. The product is intended for carburetors, throttle bodies, and unpainted metal parts, with stated outcomes including easier starts, smoother idle, and less stalling. Its residue-free specification is useful when a cleaner should not leave an oily film on treated surfaces. The 13.5-ounce aerosol is listed for old and new vehicles and equipment.

Skip it if you need multiple cans for a fleet maintenance session; Gumout Carb & Choke Jet Spray is listed as a two-pack.

WD-40 Specialist suits buyers cleaning carburetors, throttle bodies, and unpainted metal with one residue-free aerosol. Its dual-action approach is relevant for baked-on carbon, while the package is one 13.5-ounce can.

Listed on Amazon as: WD-40 Specialist Carb/Throttle Body & Parts Cleaner, 13.5 OZ

#4 · Broadest Listed Coverage

4. Holley Carburetor Cleaner

• Volume: 18 fluid oz
• Size: 18 Fl Oz (Pack of 1)
• Form: Aerosol

Best for: Broad intake-system cleaning.

Why it ranks #4: The 18-ounce low-odor aerosol lists carburetors, throttle bodies, choke and PCV valves, EGR systems, intake ports, and metal parts among its applications.

Holley’s 18-ounce jet aerosol covers a wide set of engine areas, including carburetors, throttle bodies, choke and PCV valves, EGR systems, and intake ports. Its spray dissolves grease and grime, with the listing noting that cleaning often requires no tear-down.

The broad component list makes this cleaner relevant when deposits span multiple parts of the intake and emissions-related system, rather than just a carburetor. Its jet aerosol dissolves grease and grime and is described as often allowing cleaning without tear-down, which can simplify access for routine work. Holley also says it targets carbon, gum, and varnish and can help restore cold starts, smooth idle, and throttle response. The product is listed as low VOC and low odor.

Skip it if you require a guaranteed no-teardown procedure; Holley describes that outcome as often possible, not universal.

Holley fits buyers addressing deposits across a broad intake-system area who value jet application and low-odor, low-VOC specifications. Its no-teardown benefit is qualified, so access needs can still vary by job.

Listed on Amazon as: Holley Carburetor and Throttle Body Cleaner Spray, 18 oz Can – Removes Dirt, Gum, and Carbon Buildup Deposits, Degreaser – Including Carb Linkages, Plates, and Valves

#5

5. Valvoline Carb Cleaner

• Size: 13 Fl Oz (Pack of 1)
• Form: Aerosol

Best for: Hard-starting engine cleanup.

Why it ranks #5: This 13-ounce aerosol is designed to clean unpainted metal and break down carbon, gum, and varnish, with stated relevance to hard starting.

Valvoline’s extra-strength solvent formula targets carbon, gum, and varnish, with the practical aim of clearing contaminants that restrict airflow and contribute to hard starting. It is specified for stubborn residue on unpainted metal, making it a focused option for cleaning critical engine components.

By breaking down carbon, gum, and varnish deposits, the formula addresses buildup associated with less smooth engine operation. Its stated benefit for hard starting comes from clearing contaminants that restrict airflow, linking the cleaning task to a specific operating concern rather than simply surface appearance. The product is intended for unpainted metal parts, which helps define where it fits in a maintenance routine. The listing is for one 13-ounce aerosol can, a straightforward choice for a targeted cleaning job.

Skip it if you need a stated direction tube for narrow areas; STA-BIL Carb/Choke & Parts Cleaner includes one.

Pick Valvoline for targeted deposit removal when hard starting or airflow restriction is the concern. Its 13-ounce aerosol is a single-can option, and the listed application is limited to unpainted metal parts.

Listed on Amazon as: Valvoline Carb, Choke & Throttle Body Cleaner, 13 oz

#6

6. STA-BIL Carb & Choke Cleaner

• Volume: 12 fluid oz
• Size: 12.5 Fl Oz (Pack of 1)
• Form: Spray

Best for: Mixed gasoline and diesel equipment.

Why it ranks #6: The 12.5-ounce product includes a direction tube for hard-to-reach areas and is listed for gasoline and diesel engines and unpainted metal parts.

STA-BIL’s cleaner is listed for both gasoline and diesel engines, giving owners of varied equipment one formula for carburetor and choke deposits. Its included direction tube also reaches hard-to-access areas, while the formula is stated not to harm catalytic converters or oxygen sensors.

The cleaner dissolves gum, varnish, dirt, lead, and carbon deposits, which can support faster starts and smoother idling after buildup is removed. A spray nozzle with a direction tube helps deliver it into less accessible areas rather than limiting application to exposed surfaces. STA-BIL lists cars, trucks, motorcycles, tractors, marine engines, lawnmowers, snowmobiles, and other equipment among its uses. It cleans unpainted metal and does not leave oily residue, a practical consideration for treated engine components.

Skip it if you need a large multi-can supply for repeated shop use; SQ’s 12-pack provides more cans per order.

STA-BIL fits owners servicing gasoline or diesel equipment who value a direction tube and broad listed applications. It comes as a single 12.5-ounce can, so frequent multi-machine maintenance may call for a larger pack.

Listed on Amazon as: STA-BIL Carb/Choke & Parts Cleaner, 12.5 oz

#7 · 50-State Formula

7. CRC Clean-R-Carb

• Volume: 12 fluid oz
• Size: 12 Oz
• Form: Liquid

Best for: VOC-compliant component cleaning.

Why it ranks #7: Its 12-ounce formula is stated to meet all state and federal VOC regulations and to be harmless to catalytic converters and oxygen sensors.

CRC Clean-R-Carb is explicitly a 50-state formula that meets state and federal VOC regulations, making compliance its clearest distinction. It targets deposits on venturis, linkages, butterflies, and PCV systems, with stated compatibility for catalytic converters and oxygen sensors.

The formula is described as instantly dissolving deposits on venturis, linkages, butterflies, and PCV systems, connecting its application to components involved in fuel-system performance. CRC also states that the cleaner is harmless to catalytic converters and oxygen sensors, a useful compatibility point for owners maintaining equipped engines. Its 50-state formula meets all state and federal VOC regulations, helping buyers choose according to the product’s stated regulatory scope. The listing identifies a 12-ounce product in liquid form.

Skip it if you require an aerosol application; WD-40 Specialist Carb/Throttle Body & Parts Cleaner is listed as an aerosol can.

CRC suits buyers prioritizing stated VOC compliance and cleaning of venturis, butterflies, linkages, and PCV systems. Note that its supplied specification says liquid form, so it may not match an aerosol-only workflow.

Listed on Amazon as: CRC Clean-R-Carb Carburetor Cleaner (50 State Formula), 12 Wt Oz, 05379

#8

8. Cyclo Carb Clean

• Volume: 19 fluid oz
• Size: 19 oz (Pack of 1)
• Form: Spray

Best for: Larger-volume sensor-safe cleaning.

Why it ranks #8: The 19-ounce spray removes varnish, carbon, and dirt; its listed compatibility includes oxygen sensors and fuel-injector throttle plates.

Cyclo provides a 19-ounce can, a larger single-can volume for buyers cleaning deposits across carburetor-related components. Its solvent spray removes varnish, carbon, and dirt, and the supplied details specifically identify oxygen sensors and fuel-injector throttle plates as safe applications.

The solvent spray targets varnish, carbon, and dirt, giving it a defined role for deposit cleanup rather than general-purpose surface treatment alone. Its stated safety for oxygen sensors and fuel-injector throttle plates helps buyers assess use around those components. The 19-ounce size offers more contents in one can than several smaller listed options, which can be useful for a broader maintenance session. Cyclo also states that the product meets VOC requirements of OTC states; it is identified as flammable.

Skip it if you need an expressly nonflammable cleaner; Cyclo’s supplied safety information identifies this product as flammable.

Cyclo suits buyers wanting a larger can for deposit removal on components that include oxygen sensors and fuel-injector throttle plates. Its flammability is an important handling boundary, and its listed volume is one 19-ounce can.

Listed on Amazon as: Cyclo – C5-EACH – Carb Clean 19 Ounce

#9

9. Johnsen's Carburetor Cleaner

• Volume: 10 fluid oz
• Size: 10 Fl Oz (Pack of 1)
• Form: Spray

Best for: VOC-regulated-area applications.

Why it ranks #9: This 10-ounce spray is formulated to meet VOC requirements in all 50 states and is described as suitable for modern fuel-injected engines.

Johnsen’s cleaner is formulated to meet VOC requirements in all 50 states, a key distinction for buyers working in areas with consumer-product VOC restrictions. Its listed targets include varnish and sludge on carburetors, linkages, PCV valves, automatic chokes, and air intakes.

The stated VOC formulation makes this a relevant option where rules restrict consumer-product emissions, while its component list points to more than carburetor bowls alone. It removes varnish, sludge, and other deposits from linkages, PCV valves, automatic chokes, and air intakes, allowing one can to address several connected areas during maintenance. The product is also described as formulated for modern fuel-injected engines. At 10 ounces, it is a compact single-can choice for a focused cleaning task.

Skip it if you want a larger single can for extended cleaning; Berryman B-12 offers a listed 20-ounce aerosol.

Johnsen’s fits buyers seeking a VOC-formulated cleaner for carburetors and related intake components, including modern fuel-injected engines. The 10-ounce can is suited to focused work rather than jobs requiring a larger listed volume.

Listed on Amazon as: Johnsen's 4641 VOC Compliant Carburetor Cleaner Spray – 10 oz.

#10

10. SQ Carburetor Cleaner

• Volume: 12.5 fluid oz
• Size: 12.5 Fl Oz (Pack of 12)
• Form: Aerosol

Best for: High-volume small-engine maintenance.

Why it ranks #10: The 12-can pack suits stocking multiple cans, but its stated sales restrictions cover several states and it is described as highly flammable.

SQ supplies twelve 12.5-ounce cans, making it the bulk-pack choice here for repeated carburetor and choke cleaning. The non-chlorinated aerosol is also described as a strong engine starter for lawn mowers and two-stroke engines, with a residue-free finish after cleaning.

The twelve-can quantity can support recurring maintenance across multiple engines without relying on a single can. SQ identifies lawn mowers and two-stroke engines as applications and describes the product as an engine starter, while its carburetor and choke cleaner designation covers the core task. The residue-free formula avoids leaving residue after use. Availability is geographically restricted: the supplied details exclude several states and parts of Utah, so location is an important buying consideration before choosing this pack.

Skip it if you live in a restricted state or need a single can; STA-BIL Carb/Choke & Parts Cleaner is listed as a one-can option.

SQ fits operators who maintain several lawn mowers or two-stroke engines and can use a twelve-can pack. Check the listed geographic sales restrictions, which rule it out for buyers in excluded areas.

Listed on Amazon as: SQ Carburetor Cleaner, 12 pack, 12.5 Oz per bottle