Best Carburetor Cleaner (2026)
Carburetor cleaner sprays for home garage carb work, compared by what they dissolve, what they fit, pack size and warranty.
On this page
Top picks at a glance
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- 1
Best OverallGumout 8000022319.6/10View on Amazon - 2
Best for Throttle BodiesWD-40 Specialist 3001349.6/10View on Amazon - 3
Best Value PackSQ Carburetor Cleaner9.5/10View on Amazon - 4
Best for Chokes and EGRCRC Clean-R-Carb 050799.5/10View on Amazon
A mower that cranks and dies, a truck that idles rough on a cold morning, a carburetor gummed up after a winter in the shed: each one points at the same small job, and the best carburetor cleaner is the spray that dissolves gum, varnish and carbon from the carburetor and choke.
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Quick picks
- Best Overall Gumout 800002231: 14 oz cans in a pack of 6, 50-state VOC compliant, removes varnish, gum and carbon. Check price on Amazon
- Best for Throttle Bodies WD-40 Specialist 300134: Dual-action spray for carburetors, throttle bodies and unpainted metal parts, 13.5 oz. Check price on Amazon
- Best Value Pack SQ Carburetor Cleaner: 12-pack of 12.5 oz cans, non-chlorinated, leaves no residue. Check price on Amazon
- Best for Chokes and EGR CRC Clean-R-Carb 05079: 12 wt oz can for automatic chokes, EGRs, PCV valves and heat risers. Check price on Amazon
Picks for the garage
Gumout 800002231 Carb/Choke Carburetor Cleaner
A 14 oz carb and choke cleaner spray in a pack of 6, 50-state VOC compliant, that removes varnish, gum and carbon from carburetors, choke valves and throttle linkages.
Pros
- Pack of 6 cans at 14 oz each
- 50-state VOC compliant formula
- Removes varnish, gum and carbon
- Listed to help hard starting, rough idling and stalling
Cons
- No warranty term stated
- No safety listing stated
- Spec table shows sensor compatibility as X, with no explanation
- Pack of 6 means 84 fl oz bought at once
WD-40 Specialist Carb/Throttle Body & Parts
A 13.5 oz all-in-one carb, throttle body and parts cleaner spray with a dual-action system that breaks up baked-on carbon and blasts the deposits away.
Pros
- Dual-action cleaning: solvent breaks up carbon, spray blasts it away
- Will not affect oxygen sensors or catalytic converters on incidental contact
- Stated for cars, trucks, tractors, motorcycles, boats and lawn equipment
- Residue free, with a fresh scent
Cons
- No warranty term stated
- No safety listing stated
- Sold as a 13.5 oz can, no pack option listed
- No stated use for choke valves
CRC Clean-R-Carb Carburetor Cleaner 05079
A 12 wt oz carburetor cleaner spray that dissolves gum, sludge and varnish, for automatic chokes, carburetor components, EGRs, heat risers, PCV valves and intake parts.
Pros
- Dissolves gum, sludge and varnish
- Stated for automatic chokes, EGRs, PCV valves and heat risers
- Listed to help backfiring, overheating, difficult starting and power loss
- Unscented formula
Cons
- Title says 12 wt oz, spec table lists a 16 ounce aerosol
- Warranty shown only as Manufacturer Warranty, with no term
- No safety listing stated
- Sold as a 12 wt oz can, no pack option listed
SQ Carburetor Cleaner, 12 pack, 12.5 Oz per bottle
A non-chlorinated carburetor and choke cleaner in a 12-pack of 12.5 oz cans that leaves no residue, and doubles as an engine starter for lawn mowers and two-stroke engines.
Pros
- 12-pack of 12.5 oz cans, 150 fl oz in total
- Non-chlorinated and leaves no residue
- Fully made in the USA
- Doubles as an engine starter for lawn mowers and two-stroke engines
Cons
- Highly flammable
- Sale restricted in several states, and the bullets and spec table list different states
- No warranty term stated
- No safety listing stated
Compared on paper
| Model | Shop Score | Type | Can size | Pack | Use | Warranty |
|---|---|---|---|---|---|---|
| Gumout 800002231 | 9.6/10 | Carb/choke spray | 14 oz | 6 | Carburetors, choke valves, throttle linkages | Not stated |
| WD-40 Specialist 300134 | 9.6/10 | Carb/throttle body spray | 13.5 oz | 1 | Carburetors, throttle bodies, unpainted metal parts | Not stated |
| CRC Clean-R-Carb 05079 | 9.5/10 | Carb cleaner spray | 12 wt oz | 1 | Automatic chokes, EGRs, PCV valves, intake parts | Manufacturer Warranty |
| SQ Carburetor Cleaner | 9.5/10 | Carb/choke spray | 12.5 oz | 12 | Carburetors, chokes, lawn mowers, two-stroke engines | Not stated |
Specifications are manufacturer rated, as published on each listing and collected 22 October 2026. Where a listing contradicts itself, both figures are shown.
How the points were given
Each cleaner is scored on performance, build, value, safety and warranty. How we pick explains the weights. None of the listings states a UL, ETL or CSA listing, so safety adds nothing to any score here, and none gives a clear warranty term.
| Product | Shop Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Gumout 800002231 | 9.6 | 30 | 21 | 21 | n/a | 0 |
| WD-40 Specialist 300134 | 9.6 | 30 | 21 | 19 | n/a | 0 |
| CRC Clean-R-Carb 05079 | 9.5 | 28 | 19 | 19 | n/a | 0 |
| SQ Carburetor Cleaner | 9.5 | 26 | 18 | 20 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
What the listings tell you
We read 4 carburetor cleaner listings. Only 1 states a 50-state VOC compliant formula, 2 give a pack of 6 or more cans, and 1 states it will not affect oxygen sensors or catalytic converters. Two listings contradict themselves on a basic figure: the SQ gives two different restricted-state lists, and the CRC lists a 12 wt oz can in the title and a 16 ounce aerosol in the spec table.
Buying guide: the best carburetor cleaner for your garage
Spray or soak
All 4 picks here are aerosol sprays, so the choice is which deposits the spray takes on and which parts it fits. The Gumout names varnish, gum and carbon, the CRC names gum, sludge and varnish, the WD-40 pairs a solvent formula that breaks up baked-on carbon with a spray that blasts the deposits away, and the SQ states it leaves no residue.
What it must dissolve
Match the spray to the deposits in front of you. Gum, varnish and carbon are the deposits the Gumout names, and the CRC adds sludge to gum and varnish. If the carburetor also feeds an automatic choke, the CRC lists chokes, EGRs, PCV valves and heat risers among its uses.
Flammability and ventilation
The SQ listing states its cleaner is highly flammable, so keep that can away from flames and sparks and work where air moves. The other listings do not state a flammability figure, so check the label on the can you buy and keep every can away from ignition sources.
Sensor and catalyst safety
Only the WD-40 listing states its spray will not affect oxygen sensors or catalytic converters on incidental contact. The other listings do not state sensor or catalyst safety, so check the label before spraying near sensors.
Pack size and storage
The Gumout comes as a pack of 6 cans at 14 oz each, and the SQ as a pack of 12 cans at 12.5 oz each, so both need shelf space for the whole pack. The WD-40 is a 13.5 oz can and the CRC a 12 wt oz can, each sold on its own. Check the SQ restricted-state list before ordering, since its listing bars sale in several states.
Use rated jack stands on solid ground, wear eye protection with power and air tools, keep fuel-burning equipment out of a closed garage, and follow the manual for every tool. Read our Safety Disclaimer.
Garage Fit Check
- All 4 picks are aerosol sprays, so no outlet, battery or power is needed.
- A pack of 6 cans at 14 oz each and a pack of 12 cans at 12.5 oz each need shelf space for the whole pack; the WD-40 and CRC cans need less shelf space.
- Keep the SQ away from flames and sparks: its listing states it is highly flammable.
- Check the SQ restricted-state list before ordering: its bullets bar sale in CA, CO, CT, DE, MD, MI, NH, NY, OH, RI and parts of UT.
- Check the can size on the CRC before buying: the title says 12 wt oz and the spec table lists a 16 ounce aerosol.
FAQ: garage tools
What is carburetor cleaner?
Carburetor cleaner is a solvent spray that removes gum, varnish and carbon from carburetors, choke valves and throttle linkages, as the Gumout listing states. The CRC adds automatic chokes, EGRs, heat risers, PCV valves and intake parts to the list of uses.
How does carburetor cleaner work?
The WD-40 listing describes a dual-action system: a solvent formula breaks up baked-on carbon deposits, then the spray blasts the deposits and waste away. The CRC states its formula dissolves gum, sludge and varnish to help restore fuel system function.
What is carburetor cleaner made of?
The listings here do not name ingredients. The SQ listing states its formula is non-chlorinated, and the Gumout listing states a non-toxic material feature.
Is carburetor cleaner flammable?
The SQ listing states its cleaner is highly flammable. The Gumout, WD-40 and CRC listings do not state a flammability figure.
How do I use carburetor cleaner spray?
Spray it on the carburetor, throttle body or unpainted metal parts, as the WD-40 listing states, and let the solvent break up the deposits before the spray blasts them away. The Gumout listing states its spray cleans gum, varnish and dirt inside and outside the carburetor chamber.
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