Best Solvent To Clean Carburetor: 10 Options Compared

#1 · Best Overall

1. Valvoline Carb Cleaner

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

Best for: Deposit-focused engine maintenance.

Why it ranks #1: Its extra-strength solvent formula targets carbon, gum, and varnish on unpainted metal, making it a direct fit for common carburetor deposits.

Solvent strength aimed at carbon, gum, and varnish is the Valvoline cleaner’s defining feature, helping clear deposits associated with harder starting and restricted airflow. Its aerosol format is intended for unpainted metal components, making it a focused option for carburetor, choke, and throttle-body maintenance rather than a general-purpose parts bath.

Valvoline’s solvent formula targets carbon, gum, and varnish, so it addresses several common deposit types in one cleaning step. The product is also specified for unpainted metal parts, which gives the work a clear material boundary: use it on those components rather than assuming it suits painted surfaces. Its stated role in clearing airflow-restricting contaminants connects carburetor cleaning with restoring easier starts and smoother engine operation. The 13-ounce aerosol comes as a single bottle.

Skip it if you need a cleaner expressly described for carburetors, throttle bodies, and parts together; WD-40 Specialist 300134 names all three.

Choose this Valvoline aerosol for engine owners cleaning deposit-coated, unpainted metal carburetor or throttle components and addressing hard starts. Its stated material scope is unpainted metal, so it is not the right pick when the job requires a cleaner specified for other surfaces.

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

#2 · Dual-Action Spray

2. WD-40 Specialist Cleaner

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

Best for: Multi-part carb and throttle cleaning.

Why it ranks #2: The 13.5-ounce aerosol combines solvent cleaning with a forceful spray and is listed for carburetors, throttle bodies, and unpainted metal.

A dual-action system sets WD-40 Specialist apart: its solvent formula breaks up baked-on carbon, then its spray blasts deposits and waste away. That combination serves buyers cleaning carburetors, throttle bodies, and unpainted metal parts, with stated applications spanning old and new vehicles and equipment.

The solvent-and-spray sequence pairs deposit loosening with physical removal, giving the cleaning process two distinct actions rather than relying on solvent alone. WD-40 Specialist identifies carburetors, throttle bodies, and unpainted metal parts as targets, so one can is relevant when a maintenance job crosses those components. Its stated use on old and new vehicles and equipment broadens the listed application range. The 13.5-ounce aerosol is also described as residue-free.

Skip it if you want a 50-state VOC-compliant formula specifically identified as meeting state and federal VOC regulations; CRC Clean-R-Carb 05379 fits that requirement.

Pick WD-40 Specialist when your job involves a carburetor plus throttle-body or unpainted-metal cleaning across vehicle or equipment types. Its dual-action spray suits deposit removal, but its stated component scope should guide surface selection.

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

#3 · Largest Aerosol

3. Berryman B-12 Cleaner

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

Best for: Large-can throttle-body cleaning.

Why it ranks #3: Its 20-ounce aerosol targets gum, varnish, sludge, and carbon on carburetor and throttle components, with an extension tube included.

A 20-ounce aerosol with an extension tube gives Berryman B-12 a useful combination of substantial can size and targeted application. It removes gum, varnish, sludge, and carbon from carburetors, chokes, and throttle bodies, with stated benefits for airflow, cold starts, and acceleration.

Berryman names carburetors, chokes, and throttle bodies as targets, allowing one cleaner to address several parts of the air-fuel system. Its deposit list includes gum, varnish, sludge, and carbon; removing buildup from those components is tied to smoother airflow and fewer rough-idle, stalling, or hesitation issues. The 20-ounce aerosol includes an extension tube for more directed application. Its non-chlorinated formula is also specified as safe for oxygen sensors and catalytic converters.

Skip it if you need an immersion cleaner safe for plastic and rubber components; Berryman Chem-Dip 0996 is listed for those materials.

Berryman B-12 fits buyers cleaning carburetors and throttle components who want an extension tube and a larger aerosol can. Its stated flammability calls for careful handling, so it may not suit jobs where that hazard cannot be managed.

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

#4 · Immersion Cleaner

4. Berryman Chem-Dip

• Size: 96 Fl Oz (Pack of 1)
• Volume: 0.75 gallons
• Form: Liquid

Best for: Immersion cleaning for component batches.

Why it ranks #4: This 0.75-gallon liquid is designed for fast immersion cleaning and lists gum, varnish, sludge, carbon, oil, and grease removal.

Fast-acting immersion without heat or agitation is the defining advantage of Berryman Chem-Dip for buyers cleaning removed carburetor parts. Its 0.75-gallon liquid targets gum, varnish, sludge, hard carbon, oil, and grease, and is listed as safe for plastic, rubber, and most painted components.

Chem-Dip’s immersion format suits parts that can be submerged, while the stated ability to work without heat or agitation simplifies the cleaning setup. Its deposit range covers gum, varnish, sludge, hard carbon, oil, and grease, making it relevant for heavily soiled components. The product is compatible with most metals and alloys and is also described as safe on plastic, rubber, and most painted parts. The 0.75-gallon volume supports multiple submerged components, subject to the available container and parts size.

Skip it if you need a spray for cleaning an assembled carburetor in place; Gumout 800002231 is described as a maintenance aerosol that works without disassembly.

Berryman Chem-Dip is for buyers able to remove and submerge carburetor parts, especially when deposits include grease or hard carbon. Its broad stated material compatibility is useful, but the immersion process sets the workflow boundary.

Listed on Amazon as: Berryman 0996 Chem-Dip Carburetor, 0.75 Gallon, (Single Unit)

#5 · 50-State Formula

5. CRC Clean-R-Carb

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

Best for: VOC-conscious carburetor maintenance.

Why it ranks #5: The 12-ounce 50-state formula dissolves deposits on carburetor venturis, linkages, and butterflies and is listed as harmless to oxygen sensors.

CRC Clean-R-Carb’s 50-state formula is its clearest differentiator, meeting state and federal VOC regulations while targeting deposits on venturis, linkages, butterflies, and PCV systems. It suits buyers who want carburetor-focused cleaning with specified compatibility for catalytic converters and oxygen sensors.

The cleaner is identified for venturis, linkages, butterflies, and PCV systems, giving carburetor maintenance a set of named targets beyond the main body. CRC says it instantly dissolves deposits on those parts, connecting the cleaning step with improved fuel-system performance and enhanced fuel economy. Its 50-state formula meets state and federal VOC regulations, while the product information also says it is harmless to catalytic converters and oxygen sensors. The listed form is liquid, not aerosol.

Skip it if you prefer an aerosol for routine cleaning without requiring disassembly; Gumout 800002231 is described as a quick maintenance spray.

CRC is a fitting choice for buyers prioritizing a VOC-compliant formula and cleaning named carburetor and PCV components. It is listed as a liquid, so consider that form when choosing how the cleaner will fit into your shop workflow.

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

#6

6. STA-BIL Carb Cleaner

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

Best for: Broad gasoline and diesel engine use.

Why it ranks #6: Its 12.5-ounce spray targets gum, varnish, dirt, lead, and carbon, and the listing says it leaves no oily residue on unpainted metal.

Compatibility across gasoline and diesel engines gives STA-BIL a broad maintenance role, from cars and motorcycles to tractors, marine engines, and lawn equipment. Its formula dissolves gum, varnish, dirt, lead, and carbon, while the supplied direction tube helps reach less accessible cleaning areas.

The stated engine range includes gasoline and diesel applications such as cars, trucks, motorcycles, tractors, marine engines, lawnmowers, and snowblowers, making this a versatile option for mixed-equipment maintenance. Its formula targets gum, varnish, dirt, lead, and carbon deposits, linking cleaning with faster starts and smoother idling. The included direction tube is identified for reaching hard-to-access areas. STA-BIL also says the cleaner leaves no oily residue and will not harm catalytic converters or oxygen sensors.

Skip it if you want a larger single aerosol can for carburetor and throttle-body cleaning; Berryman B-12 is listed in a 20-ounce size.

STA-BIL suits owners maintaining mixed gasoline- and diesel-powered equipment who value a direction tube and residue-free cleaning. Check that its 12.5-ounce size fits the scope of the job, especially when servicing several machines.

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

#7

7. Gumout Carb Cleaner

• Size: 14 Fl Oz (Pack of 6)
• Volume: 413.98 ml
• Form: Aerosol

Best for: Multi-can fleet maintenance.

Why it ranks #7: The 14-ounce aerosol cleans gum, dirt, and varnish inside and outside carburetors; this listing is a six-can pack for repeated jobs.

A six-can supply of 14-ounce Gumout aerosol is the practical differentiator here, giving fleet and plant maintenance work multiple applications on hand. The cleaner targets gum, dirt, and varnish inside the carburetor throat and outside the carburetor, while its 50-state VOC-compliant formulation suits regulated-area use.

Gumout’s jet-spray aerosol is described as cleaning gum, dirt, and varnish from both the carburetor exterior and the inside of its throat. That inside-and-outside coverage supports routine maintenance without requiring disassembly, according to the supplied description. Its stated benefits include helping with hard starting, rough idling, stalling, and high exhaust emissions. The six-pack format supplies multiple 14-ounce cans for repeat maintenance, and the low-odor specification may matter when selecting a cleaner for fleet or plant work.

Skip it if you need one can rather than a six-pack for a single carburetor job; Valvoline 681045 is supplied as one 13-ounce bottle.

Choose Gumout when a shop or fleet needs several aerosol cans for recurring carburetor and choke maintenance. Its listed use includes interior throat and exterior cleaning, but the six-can supply may be more than a one-off job calls for.

Listed on Amazon as: Gumout 800002231 Carb/Choke Carburetor Cleaner Spray, Carb Intake Valve Cleaner Cleans Gum Varnish & Dirt Inside & Outside Carburetor Chamber 14 Oz. (Pack of 6)

#8

8. NORTHWEST Ultrasonic Solution

• Size: 128 Fl Oz (Pack of 1)
• Volume: 1 gallons
• Form: Liquid

Best for: Ultrasonic tank cleaning solution.

Why it ranks #8: This concentrated gallon is specifically formulated for ultrasonic cleaning and targets varnish, gum, dirt, and other contaminants on components.

A concentrated, gallon-size liquid for ultrasonic cleaners distinguishes NORTHWEST ENTERPRISES from aerosol carburetor sprays. Its stated targets include dirt, varnish, gums, and other contaminants on interior and exterior parts, making it an option for buyers cleaning components by immersion in a tank.

This solution is specifically presented for ultrasonic cleaning, so it fits a workflow that places parts in a tank rather than spraying an assembled carburetor. The supplied directions suggest a 1:5 dilution with water, allowing the gallon of concentrate to be prepared for use according to that ratio. Its listed applications include carburetors, valves, heat exchangers, engine components, heads, seats, and rockers. The product information also notes use on plastic and vinyl, with a recommendation to test first and dry thoroughly.

Skip it if you want a spray for cleaning carburetor parts without an ultrasonic tank; WD-40 Specialist 300134 is an aerosol cleaner.

Choose this gallon solution when you already use an ultrasonic tank and need a concentrated cleaner for carburetors and engine components. The supplied dilution guidance supports tank preparation, but this is not a direct-use aerosol spray.

Listed on Amazon as: NORTHWEST ENTERPRISES Ultrasonic Carburetor Cleaning Solution, 1 Gallon

#9

9. Johnsen's 4642 Cleaner

• Size: 16.25 Fl Oz (Pack of 1)
• Volume: 16.25 fluid oz
• Form: Spray

Best for: Residue-free carburetor spray.

Why it ranks #9: The 16.25-ounce spray removes varnish and sludge from carburetors, linkages, PCV valves, and chokes, with VOC-market restrictions noted.

A residue-free spray in a 16.25-ounce can is the defining practical detail of Johnsen’s 4642 carburetor cleaner. Its listed targets include varnish, sludge, and other deposits on the carburetor, linkage, PCV valves, automatic choke, and air intake, supporting focused component cleaning.

Johnsen’s identifies several connected fuel-and-air components—the carburetor, linkage, PCV valves, automatic choke, and air intake—so the cleaner can cover more than one area during a maintenance session. The listed deposit targets include varnish and sludge, while its residue-free specification is relevant when choosing a spray for component cleaning. Its 16.25-ounce size supplies a larger can than many smaller single-can options. The product is described as VOC compliant, with sale information addressing areas that restrict VOC content to 45%.

Skip it if you need a cleaner explicitly described for all 50 states; CRC Clean-R-Carb 05379 states that its formula meets all state and federal VOC regulations.

Johnsen’s suits buyers looking for one spray to address carburetor deposits along with linkage, PCV, choke, and air-intake areas. Its VOC sale information makes local rules a relevant boundary when selecting this cleaner.

Listed on Amazon as: Johnsen's 4642 VOC Compliant Carburetor Cleaner Spray – 16.25 oz.

#10

10. Motorcraft Carb Cleaner

• Size: 1 Count (Pack of 1)
• Form: Liquid

Best for: Vehicle-specific Motorcraft cleaner.

Why it ranks #10: The listing identifies a genuine Motorcraft tune-up cleaner, but provides little detail about carburetor deposits, application method, or compatibility.

Vehicle-specific fit is the main differentiator of this Motorcraft carb cleaner: the listing identifies it as a genuine part made to fit a specific vehicle. It names tune-up cleaner part PM2 and specifies liquid form, making it a focused choice when matching that vehicle-oriented part is the priority.

Motorcraft describes this as a genuine part that fits a specific vehicle and is manufactured to meet specifications for fit, form, and function. Those details make vehicle application the central selection consideration, rather than a broad list of deposit targets or compatible surfaces. The listing names it as tune-up cleaner part PM2 and gives its form as liquid. Buyers can use those identifiers to distinguish it as a vehicle-specific maintenance item, while the supplied description does not elaborate on a cleaning process.

Skip it if you need a cleaner with named deposit targets and broad carburetor applications; Valvoline 681045 identifies carbon, gum, and varnish removal.

Consider this Motorcraft item when selecting a vehicle-specific tune-up cleaner and fit, form, and function matter most. Its supplied details identify liquid form and part PM2, so it is less informative for buyers seeking a general-purpose cleaner with listed deposit targets.

Listed on Amazon as: CARB Cleaner