Best Carb Cleaner Spray for Carburetors and Throttle Bodies

#1 · Best Overall

1. WD-40 Specialist Carb/Throttle Cleaner

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

Best for: Carb and throttle-body cleaning.

Why it ranks #1: Covers carburetors, throttle bodies, and unpainted metal; its dual-action solvent and spray system targets baked-on carbon in a 13.5-ounce aerosol.

A dual-action system pairs solvent cleaning with a forceful spray, helping WD-40 Specialist tackle baked-on carbon rather than relying on one cleaning action. This all-in-one aerosol is specified for carburetors, throttle bodies, and unpainted metal parts, with the aim of easier starts and steadier idling.

The solvent formula breaks up tough baked-on carbon, while the spray blasts away deposits and waste; that combination can simplify cleaning several related components in one product. Its listed scope includes carburetors, throttle bodies, and unpainted metal parts, making it suitable for varied vehicle and equipment jobs. WD-40 Specialist also identifies old and new vehicles and equipment as applications, and describes the result as faster starting with a smooth, consistent idle and less stalling.

Skip it if you want a larger listed can for repeated cleaning; Cyclo Carb Clean comes in a 19-ounce size.

WD-40 Specialist suits owners cleaning both a carburetor and throttle body who value its two-part cleaning action. Its listed applications include unpainted metal; keep the product's flammability warning in mind during handling.

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

#2 · Largest Can

2. Berryman B-12 Cleaner

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

Best for: Large-volume carb and throttle cleaning.

Why it ranks #2: The 20-ounce aerosol is the largest listed single can and targets gum, varnish, sludge, and carbon on carburetor, choke, and throttle components.

A 20-ounce aerosol can gives Berryman B-12 the largest listed single-can volume in this group, useful when cleaning several air-fuel components. It removes gum, varnish, sludge, and carbon from carburetors, chokes, and throttle bodies, and the supplied facts include an extension tube.

The extension tube supports directed application, while the 20-ounce volume provides more cleaner in one can for multi-component maintenance. Berryman names carburetors, chokes, and throttle bodies as targets and connects deposit removal with restoring airflow and engine performance. Its non-chlorinated formula is described as safe for oxygen sensors and catalytic converters, helping buyers assess use around those components. The listing also links cleaning with addressing rough idle, stalling, and hesitation.

Skip it if you want a smaller 12-ounce can for a focused job; CRC Clean-R-Carb is listed at 12 ounces.

Berryman B-12 suits buyers cleaning several air-fuel components who value a large can, extension tube, and stated emissions-component compatibility. Its extremely flammable warning is a key handling consideration.

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

#3 · Broadest Component Range

3. Holley Carburetor Cleaner

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

Best for: Broad throttle-body and valve cleaning.

Why it ranks #3: Its 18-ounce low-VOC aerosol lists carburetors, throttle bodies, choke and PCV valves, EGR systems, intake ports, and metal parts.

An 18-ounce can and jet aerosol spray give Holley a useful combination for tackling deposits across multiple engine passages. Its listed targets include carburetors, throttle bodies, choke and PCV valves, EGR systems, intake ports, and metal parts, with the spray intended to dissolve grease and grime.

Holley’s broad target list covers both familiar carburetor parts and systems such as EGR components and intake ports, helping buyers address multiple deposit locations with one cleaner. The jet aerosol spray is described as dissolving grease and grime, often without tear-down, which can reduce disassembly for suitable tasks. Holley also says regular use helps restore cold starts, smooth idle, and responsive throttle. Low VOC and low odor are listed product characteristics.

Skip it if you need a formula without listed flammable ingredients; CRC Clean-R-Carb’s supplied details emphasize its 50-state formula instead.

Holley suits buyers cleaning multiple intake and engine components who value a jet spray and an 18-ounce can. Its listed flammable ingredients and broad component scope are important handling and application considerations.

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

#4 · Multi-Engine Use

4. STA-BIL Carb/Choke Cleaner

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

Best for: Mixed-fuel equipment maintenance.

Why it ranks #4: Listed for gasoline and diesel engines across vehicles and equipment; it cleans unpainted metal and is described as safe for catalytic converters and oxygen sensors.

A direction tube for hard-to-access areas gives STA-BIL Carb/Choke & Parts Cleaner a practical edge when deposits are tucked inside engine components. Its formula dissolves gum, varnish, dirt, lead, and carbon on unpainted metal, supporting easier starts and smoother idling across gasoline and diesel equipment.

The high-grade formula is specified for unpainted metal and leaves no oily residue, so cleaned parts do not have an oily film left behind. Compatibility with gasoline and diesel engines broadens its role from cars and motorcycles to tractors, marine engines, and lawn equipment. STA-BIL also says it will not harm catalytic converters or oxygen sensors, a useful boundary for work around those emissions components; the direction tube helps reach less accessible areas.

Skip it if you need a 20-ounce can for repeated jobs; Berryman B-12 offers that larger listed volume.

Choose STA-BIL for mixed gasoline and diesel equipment when a direction tube and residue-free cleaning matter. Its unpainted-metal use and stated catalytic-converter and oxygen-sensor compatibility are useful boundaries to consider before applying it.

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

#5

5. Valvoline Carb/Throttle Cleaner

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

Best for: Deposit-focused engine maintenance.

Why it ranks #5: Its solvent formula targets carbon, gum, and varnish on unpainted metal, and the 13-ounce aerosol is specifically described for carburetor and throttle-body cleaning.

Extra-strength solvents are Valvoline Carb, Choke & Throttle Body Cleaner’s key differentiator, helping break down carbon, gum, and varnish that can restrict airflow. The aerosol is intended for stubborn residue on unpainted metal parts, linking deposit removal with cleaner operation and improved starting performance.

Valvoline specifically connects clearing airflow-restricting contaminants with helping restore hard starting, so the benefit is relevant when deposits affect engine response. Its solvent formulation targets carbon, gum, and varnish, while the unpainted-metal scope identifies the surface type for cleaning. The product covers carburetor, choke, and throttle-body work, making it a focused option for those components rather than a cleaner whose supplied information emphasizes a broad range of equipment or applications.

Skip it if you need an explicit oxygen-sensor compatibility statement; STA-BIL Carb/Choke & Parts Cleaner lists that assurance.

Valvoline fits buyers addressing deposit-related airflow restriction and hard starting on unpainted metal components. Its supplied details emphasize solvent cleaning and starting performance, so consider whether you need a specifically stated emissions-component compatibility claim.

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

#6 · 50-State Formula

6. CRC Clean-R-Carb

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

Best for: Emissions-component-conscious cleaning.

Why it ranks #6: The 12-ounce 50-state formula is described as meeting all state and federal VOC regulations and as harmless to catalytic converters and oxygen sensors.

A 50-state formula that meets all state and federal VOC regulations distinguishes CRC Clean-R-Carb for buyers working across regulated locations. Its cleaner dissolves deposits on venturis, linkages, butterflies, and PCV systems, while the listed compatibility with catalytic converters and oxygen sensors helps define where it can be used.

The product targets named fuel-system areas—venturis, linkages, butterflies, and PCV systems—so its application reaches beyond a carburetor’s main body. CRC says it instantly dissolves deposits to improve fuel-system performance and enhance fuel economy. Its 50-state formula meets all state and federal VOC regulations, while stated catalytic-converter and oxygen-sensor safety offers a specific emissions-system consideration. The 12-ounce size suits a focused maintenance job rather than a larger-volume can.

Skip it if you want 20 ounces in one can for repeated work; Berryman B-12 lists that volume.

CRC Clean-R-Carb fits buyers who need a stated 50-state VOC formula and want to clean named carburetor and PCV components. Its 12-ounce can is a consideration for jobs requiring more product.

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

#7

7. Cyclo Carb Clean

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

Best for: Large-can oxygen-sensor-safe cleaning.

Why it ranks #7: The 19-ounce spray removes varnish, carbon, and dirt; its listed compatibility includes oxygen sensors and fuel-injector throttle plates.

At 19 ounces, Cyclo Carb Clean offers one of the larger listed single-can volumes for jobs involving repeated spray use. Its solvent spray removes varnish, carbon, and dirt, and the product is stated to be safe for oxygen sensors and fuel-injector throttle plates.

The 19-ounce volume provides more product in one can than several smaller options, a practical consideration for maintenance sessions involving multiple components. Cyclo identifies varnish, carbon, and dirt as targets, while its stated compatibility with oxygen sensors and fuel-injector throttle plates clarifies two relevant applications. It also meets VOC requirements of OTC states. The supplied description connects Cyclo’s product range with heavy-duty equipment, truck, marine, and industrial maintenance, though this cleaner’s specific listed targets remain its cleaning guide.

Skip it if you need a cleaner specifically listing PCV valves and EGR systems; Holley Carburetor and Throttle Body Cleaner names both.

Cyclo fits buyers who want a larger can for cleaning deposits around fuel-injector throttle plates and oxygen-sensor-compatible applications. Its listed flammability and OTC-state VOC wording are relevant boundaries for handling and location.

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

#8

8. CRC Carb & Choke Cleaner

Best for: Low-VOC carburetor maintenance.

Why it ranks #8: This 12-ounce aerosol has a low-VOC formula for carburetors and automatic chokes, with stated targets including sludge, gum, and varnish.

CRC 03077’s low-VOC formula is its defining feature, with the stated aim of maximizing carburetor efficiency and improving fuel-system function. This 12-ounce aerosol removes sludge, gum, and varnish from carburetors, and the supplied description also identifies automatic chokes and carburetor components as applications.

The low-VOC formulation links the product to fuel-system maintenance while the listed deposit targets—sludge, gum, and varnish—focus it on carburetor cleaning. CRC says the formula supports carburetor efficiency, fuel-system function, and fuel economy. The supplied description names automatic chokes and carburetor components as additional uses, making it relevant for related maintenance beyond the carburetor body. Its 12-ounce aerosol is a compact option compared with larger listed cans.

Skip it if you need a larger single can for repeated cleaning; Cyclo Carb Clean lists a 19-ounce volume.

CRC 03077 fits buyers focused on carburetor and automatic-choke maintenance who want a low-VOC formula. Its 12-ounce volume suits a more contained job than work requiring a larger amount of cleaner.

Listed on Amazon as: CRC Carb & Choke Cleaner 03077 – 12 Wt. Oz. Aerosol, High-Performance Cleaner

#9

9. Johnsen's 4641 Cleaner

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

Best for: Modern fuel-injected engine cleaning.

Why it ranks #9: The 10-ounce spray targets deposits on carburetors, linkages, PCV valves, automatic chokes, and air intakes; its listed sale guidance limits where it is intended.

Johnsen’s specifically lists modern fuel-injected engines, setting its 10-ounce spray apart for buyers maintaining newer fuel-system setups. It removes varnish, sludge, and other deposits from carburetors, linkages, PCV valves, automatic chokes, and air intakes, with a low-odor formulation also listed.

The application list spans carburetor and linkage deposits as well as PCV valves, automatic chokes, and air intakes, supporting varied engine-cleaning tasks with one spray. Johnsen’s says the formula is for sale in areas that do not regulate consumer-product VOC content, while additional supplied facts say it is formulated to meet requirements in all 50 states and for modern fuel-injected engines. Its 10-ounce volume makes it a smaller can than several listed alternatives.

Skip it if you need more than 10 ounces in one can; CRC Clean-R-Carb lists a 12-ounce volume.

Johnsen’s suits maintenance work on modern fuel-injected engines and jobs spanning carburetors, PCV valves, chokes, and air intakes. Its 10-ounce size and stated VOC-market information are relevant considerations when selecting a can.

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: Bulk mower and two-stroke cleaning.

Why it ranks #10: The 12-pack suits repeat use, but its stated sales exclusions across multiple states make it less broadly suitable than the single-can options.

A 12-can case gives SQ Carburetor Cleaner a bulk format for repeated maintenance, while its listed use calls out lawn mowers and two-stroke engines. The non-chlorinated, residue-free cleaner also serves carburetor and choke work where a clean finish is part of the job.

Each aerosol can holds 12.5 ounces, and the 12-pack supplies multiple cans for ongoing workshop or equipment maintenance. SQ identifies carburetors and chokes as targets and describes the product as a fantastic engine starter for lawn mowers and two-stroke engines. Its residue-free claim means it does not leave residue after cleaning, while the non-chlorinated formulation is another specific product characteristic. State-level sales restrictions are listed, so availability depends on location.

Skip it if you live in a restricted state or need a single can; STA-BIL Carb/Choke & Parts Cleaner is listed as a 12.5-ounce single-pack product.

SQ is suited to shops or owners maintaining lawn mowers and two-stroke engines who can use a 12-can supply. Check the stated regional sales restrictions, and note its specific focus on carburetor and choke cleaning.

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