Best Spark Plug For Lawn Mower: Compare 10 Replacement Options

#1 · Best Overall

1. Briggs & Stratton 491055

• Core Material: Copper
• Top Material Type: Metal
• Compatible with Vehicle Type: Lawn Mower
• Thread Size: 491055

Best for: Briggs & Stratton replacement buyers.

Why it ranks #1: This genuine OEM two-pack explicitly lists lawn mower use and part 491055, with additional stated compatibility for several Kohler CH11S engine references.

Two genuine Briggs & Stratton 491055 plugs give mower owners a matched replacement pair, with listed substitutions including 805015, 72347, and Champion RC12Y. The copper-core construction and lawn-mower compatibility make this a focused option when the engine calls for the 491055 family rather than a broadly specified plug.

The two-plug set lets you keep a matching spare alongside the installed plug, while the listed 491055 replacement references help connect the item to an existing service part number. Its copper core is the specified electrode material, and the product is identified for lawn mowers. The description names Kohler engine models among compatible applications, but also directs buyers to consult the owner’s manual for part identification and installation, so checking the exact engine reference remains part of the job.

Skip it if you need a fully enumerated application list; Honda’s genuine BPR5ES listing identifies a specific replacement model instead.

Choose this pair if your mower calls for Briggs & Stratton 491055 or one of its listed replacements and you want a genuine matching set. Use the owner’s manual to verify the exact part reference and installation.

Listed on Amazon as: Briggs & Stratton 491055-2pk Spark Plug (2 Pack) Replaces 805015/72347/491055/Champion RC12Y

#2 · Best Honda OEM

2. Honda 98079-55846

• Core Material: Copper
• Top Material Type: Copper
• Compatible with Vehicle Type: Lawn Mower
• Thread Size: 14mm x 1.25mm

Best for: Honda OEM BPR5ES buyers.

Why it ranks #2: This genuine Honda BPR5ES plug explicitly lists lawn mower compatibility and replaces 98079-55876, making it a focused choice for matching Honda applications.

Honda’s genuine OEM 98079-55846 is identified as a BPR5ES and replaces 98079-55876, giving owners seeking that specific Honda plug a clear branded reference. Its stated 14 mm × 1.25 mm thread size and lawn-mower compatibility provide concrete checks when matching the part to service information.

The BPR5ES designation and replacement reference 98079-55876 help a buyer compare the existing plug or service documentation with this Honda part. Honda identifies it as genuine OEM, and the 14 mm × 1.25 mm thread specification gives a useful dimensional check before maintenance. The listing names lawn mowers as a compatible vehicle type and specifies a copper core and copper top. Confirm that the engine requires BPR5ES before installation, since the listed replacement reference is specific.

Skip it if you need multiple plugs in one pack; Adefol’s F6TC listing advertises a 10-pack for its applications.

Choose this Honda plug when the mower’s service information calls for BPR5ES or replacement 98079-55876 and genuine Honda branding matters. It is a single-plug listing, so account for that when planning a multi-plug service.

Listed on Amazon as: Honda Genuine OEM 98079-55846 Spark Plug BPR5ES; Replaces 98079-55876

#3 · Best B&S Pair

3. Champion Briggs & Stratton 692051

• Core Material: Copper
• Top Material Type: Copper
• Compatible with Vehicle Type: Lawn Mower
• Thread Size: RM

Best for: Briggs & Stratton plug replacements.

Why it ranks #3: This Champion two-pack is listed for Briggs & Stratton 692051, 694385, and 700646, and its specifications identify lawn mower compatibility.

Champion’s two-pack lists replacements for Briggs & Stratton 692051, 694385, and 700646, giving owners of engines using those references a concise branded match. Copper is specified for both the core and top, and the product is identified for lawn-mower use, keeping its documented application focused.

The three Briggs & Stratton replacement numbers are the clearest way to compare this Champion pair with a mower’s service information or existing plug. Two plugs provide a matched set for maintenance, while the copper core and copper top describe the listed construction. Lawn mower is the stated compatible vehicle type, and the product page asks customers to review compatibility information. Its thread-size field is given as RM, so the named replacement numbers are especially useful for confirming the intended application.

Skip it if you need a stated metric thread measurement; Honda’s 98079-55846 listing specifies 14 mm × 1.25 mm.

Choose this Champion pair if your Briggs & Stratton mower calls for 692051, 694385, or 700646 and you want two plugs from the named brand. The thread field is abbreviated, so confirm the part reference against your engine documentation.

Listed on Amazon as: OEM (Pack of 2) Champion Spark Plugs for Briggs & Stratton 692051, 694385, 700646

#4 · Best J19LM Match

4. Briggs & Stratton 796112

• Core Material: Copper
• Top Material Type: Metal
• Compatible with Vehicle Type: [IN] Inferred: Lawn mowers, go-karts, and…
• Thread Size: 796112

Best for: J19LM replacement shoppers.

Why it ranks #4: The two-pack replaces J19LM, RJ19LM, 802592, and 5095K; its product title and Briggs & Stratton branding support an engine-specific replacement choice.

The Briggs & Stratton 796112 two-pack specifically replaces J19LM and RJ19LM plugs, giving owners of engines calling for those references a direct part-number route to a matched pair. Its copper core and metal top are documented specifications; the key buying distinction is its named replacement family, not a broad list of mower models.

The replacement references J19LM, RJ19LM, 802592, and 5095K help buyers compare the existing plug designation with this 796112 set before starting maintenance. Two plugs provide a matching pair for a service job, while the copper core and metal top describe the plug’s construction. The listing associates it with lawn mowers, go-karts, and possibly other equipment only by inference, so the named Briggs & Stratton replacement numbers are the clearest supported compatibility guide.

Skip it if you need named Honda engine applications; Adefol’s F6TC listing specifies multiple Honda GX and GCV models.

This pair suits a mower owner whose existing plug is identified as J19LM, RJ19LM, 802592, or 5095K. Its replacement numbers offer a useful check, but buyers seeking model-by-model engine guidance should use a listing that provides it.

Listed on Amazon as: Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM, RJ19LM, 802592, 5095K by Briggs & Stratton

#5 · Best RC12YC Pair

5. Champion RC12YC

• Core Material: Copper
• Top Material Type: Metal
• Compatible with Vehicle Type: Car, Truck
• Thread Size: 14×19

Best for: Champion RC12YC pair seekers.

Why it ranks #5: The genuine Champion two-pack includes RC12YC plugs and a stated 0.04-inch gap, though its vehicle field says car and truck rather than lawn mower.

This two-pack supplies genuine Champion RC12YC plugs and includes a stated 0.04-inch gap, giving buyers a defined plug model and gap specification to compare with mower service requirements. Its description also names Craftsman applications, making it a targeted option when the equipment’s manual or existing part points to RC12YC.

The RC12YC designation and 0.04-inch gap provide two specific checks against the mower’s required part information before installation. Two genuine Champion plugs make a matched replacement set, and the listing names several Craftsman model numbers as compatible applications. Copper is the specified core material, while the product description instructs owners to consult the manual for proper identification and installation. The supplied vehicle-type specification says car and truck, so mower fit should rest on the listed application details and exact part match.

Skip it if you want a listing explicitly classified for lawn mowers; Honda’s 98079-55846 specification names lawn mower compatibility.

This pair is for buyers whose Craftsman equipment calls for Champion RC12YC and whose manual supports the stated gap. Because the vehicle-type field does not name lawn mowers, verify the exact application before choosing it.

Listed on Amazon as: Champion Spark Plug for Craftsman (2 Pack) # 71G RC12YC-2pk

#6

6. Harbot RC12YC

• Core Material: Copper
• Top Material Type: Ceramic
• Compatible with Vehicle Type: Lawn Mower
• Thread Size: 14mm

Best for: Cross-reference driven mower owners.

Why it ranks #6: This two-pack explicitly identifies lawn mower compatibility and cross-references Briggs & Stratton, Kohler, MTD, and John Deere part numbers.

Harbot’s two-pack lists replacement references across Champion, Briggs & Stratton, Kohler, MTD, and John Deere families, making cross-checking an existing plug number its clearest advantage. A copper core and 14 mm thread specification add concrete construction details for buyers matching a mower engine to the listed RC12YC-style applications.

The broad replacement list includes Briggs & Stratton 491055 and 792015, Kohler 12 132 02, MTD 759-3336, and John Deere M78543 and M87543. That range can help when a mower’s service information uses one of several listed brands or numbers. The package contains two plugs, and the stated 14 mm thread size helps a buyer compare specifications; the listing still supports checking the precise engine reference before installation.

Skip it if you specifically want Honda-branded OEM stock; Honda’s 98079-55846 BPR5ES is the genuine Honda option listed here.

Consider Harbot if your mower’s current plug matches one of its many listed RC12YC replacement references and a two-plug set suits the service. Check the engine’s exact number against the list before fitting.

Listed on Amazon as: RC12YC Spark Plug for BS 491055 491055S 491055T 792015 692051 694385 759-3336 John Deere M78543 M87543 Kohler 12 132 02 (Pack of 2)

#7

7. Kizut F6RTC BPR6ES

• Core Material: Copper Alloy
• Top Material Type: Copper Alloy
• Compatible with Vehicle Type: Lawn Mower
• Thread Size: 14mm x 1.25mm

Best for: MTD and Cub Cadet replacements.

Why it ranks #7: The two-pack lists lawn mower use and replacements including MTD 951-10292, Honda 98079-56846, Torch F6RTC, and NGK BPR6ES.

Kizut’s two-pack names MTD 951-10292 and 751-10292 alongside Torch F6RTC and NGK BPR6ES replacements, giving mower owners a focused cross-reference set. The stated 14 mm × 1.25 mm thread size and copper-alloy construction add practical details for matching the replacement to an existing plug.

The listing connects the plug to MTD references 951-10292 and 751-10292, and also names Torch F6RTC, NGK BPR6ES, Honda 98079-56846, and other substitutions. Those numbers help buyers cross-check service records or the old plug before ordering. A two-plug pack provides a matching pair, while the 14 mm × 1.25 mm thread specification supports a dimensional comparison. The product specifically advises verifying the engine model and part number, which remains important across its broad replacement list.

Skip it if you need Honda GX160 and GX390 applications explicitly listed; Adefol’s F6TC listing names those engine models.

This pair suits MTD mower owners whose existing plug matches 951-10292 or 751-10292, as well as buyers matching another listed reference. Verify both engine model and part number because the compatibility list spans several brands.

Listed on Amazon as: F6RTC BPR6ES Spark Plug for MTD 951-10292 751-10292 Torch Cub Cadet Troy Bilt Lawn Mower Generator 2Pack

#8

8. Tecreddy RC12YC

• Core Material: Copper
• Top Material Type: Metal
• Compatible with Vehicle Type: Lawn Mower

Best for: Multi-brand RC12YC cross-checkers.

Why it ranks #8: The listing directly describes lawn mower engine use and names numerous Briggs & Stratton, Kohler, John Deere, and Gravely cross-references.

Tecreddy’s RC12YC-compatible plug lists replacement references for Briggs & Stratton, Kohler, John Deere, and Gravely mower engines, giving cross-brand shoppers several concrete numbers to compare. Its stated 0.03-inch gap adds another specification check for owners matching a replacement plug to their engine’s requirements.

The compatibility list names Briggs & Stratton 491055 and 792015, Kohler 25 132 12-S and 12 132 02, John Deere M78543, and multiple Gravely references. Those identifiers make the listing useful when the mower’s part documentation uses one of those systems. The stated 0.03-inch gap lets buyers compare a measured or specified gap, while the product is explicitly described as not OEM, an important distinction for shoppers seeking a branded original part.

Skip it if you require genuine Briggs & Stratton plugs; the Briggs & Stratton 491055 two-pack is the OEM-branded option listed.

Tecreddy fits buyers comparing an RC12YC-style replacement across the listed mower brands and checking a 0.03-inch gap specification. Skip it if genuine OEM branding is required, and match the engine number before installation.

Listed on Amazon as: RC12YC Spark Plugs Compatible with Champion BS 491055 491055S 692051 792015 491055T 5066 Kohler 25 132 12-S JD M78543 531308128 Lawn Mower Engine

#9

9. EMLIAUMU 491055S

• Core Material: Iridium
• Top Material Type: Alloy Steel
• Compatible with Vehicle Type: Lawn Mower
• Thread Size: M14*1.25MM

Best for: Iridium specification seekers.

Why it ranks #9: This two-pack identifies lawn mower compatibility, an M14×1.25 mm thread, and 19 mm reach, but its broad reference list requires careful verification.

An iridium core distinguishes this EMLIAUMU two-pack from the copper-core options, while its listing gives exact M14×1.25 mm threads, 19 mm reach, and a 16 mm hex. Those dimensions give a mower owner specific measurements to compare before selecting a plug for a listed replacement application.

The dimensional specifications support a more deliberate fit check: M14×1.25 mm thread size, 19 mm reach, and 16 mm hex are all stated, and the product says it meets OEM standards. Its compatibility list includes RC12YC, BKR6ES, and several other plug references, giving buyers multiple routes to compare against existing service information. The iridium core is the named material, and the two-pack supplies a pair; confirm the engine’s required dimensions and reference before installation.

Skip it if you prefer a genuine Honda-branded plug; Honda’s 98079-55846 BPR5ES listing identifies its OEM product.

This pair suits buyers who need the listed replacement references and want exact thread, reach, and hex measurements alongside an iridium core. Its three-month warranty is a relevant boundary for owners comparing support terms.

Listed on Amazon as: 491055S Spark Plug Replacement | Compatible with Champion RC12YC, NGK BKR6ES, Kohler & Briggs & Stratton Lawn Mower Engines, 2 Pack

#10

10. Adefol F6TC

• Core Material: Copper
• Compatible with Vehicle Type: Lawn Mower, Go Kart, Golf Cart, Small Engine…
• Thread Size: 14mm

Best for: Honda GX-series bulk buyers.

Why it ranks #10: Its ten-pack is listed for lawn mowers and Honda small-engine series, but the broad multi-machine fit and limited included-component detail reduce mower-specific confidence.

A 10-pack of F6TC plugs, paired with a long list of Honda GX and GCV engine references, suits buyers servicing several compatible small engines or keeping multiple replacements together. The listing also cross-references NGK BP6ES and Champion N9YC, helping shoppers compare familiar plug designations.

The stated applications span Honda GX160, GX200, GX390, and several other GX and GCV models, alongside cross-references including NGK BP6ES, Bosch W6D, and Champion N9YC. That range helps buyers compare an engine model or existing plug number with the listing before a maintenance session. Copper is the specified core material, and the advertised 10-pack supports stocking multiple plugs. Check the exact engine reference, since the compatibility list—not the F6TC name alone—sets the supported applications.

Skip it if you need a Honda OEM-branded single plug; Honda’s 98079-55846 BPR5ES listing is explicitly genuine OEM.

Adefol suits owners maintaining several of the listed Honda GX or GCV engines who can use the F6TC cross-references and bulk quantity. Resolve the pack-count discrepancy in the listing before relying on the advertised quantity.

Listed on Amazon as: F6TC Spark Plugs for Honda GX160 GCV160 GX100 GX120 GX200 GX240 GX270 GX340 GX390 Series Lawnmower Engine Sparkplug, F6TC Spark Plug for NGK BP6ES and for Champion N9YC, (10 Pack F6TC Spark Plug)