Quick answer
Our overall pick is the Champion RC12YC (71G) Copper Plus, which lists a copper core center electrode and a corrosion-protected shell. Honda owners with GCV160 or GCV190 engines may prefer the Honda BPR6ES, while the two-pack Briggs & Stratton 496018 and the multi-pack Adefol and GREPSPUD listings suit owners who want spares.
Choosing from the best lawn mower spark plugs starts with matching the part number to your engine, and the listings below make that easier to check. We compared eight Amazon listings from Champion, Honda, Briggs & Stratton and other sellers, looking at what each one actually states.
Some listings are single plugs, others are multi-packs or kits with a wrench, and a few are sold as genuine parts. Start with your owner’s manual, then use our notes to see which listing fits your situation. For broader upkeep, see our routine mower maintenance guides.
Quick picks
- Overall pick with listed corrosion protection: Champion RC12YC Copper Plus Small Engine (see on Amazon)
- Honda GCV160 and GCV190 owners: Honda 98079-56846 (BPR6ES) (see on Amazon)
- Replacing older Briggs and Stratton numbers: Briggs & Stratton 796112S (see on Amazon)
- Two-pack for OHV Briggs engines: Briggs & Stratton 496018 2-Pack OHV (see on Amazon)
- Kit with a spark plug wrench: GREPSPUD F7TC 4-Pack with Wrench (see on Amazon)
8 Best Lawn Mower Spark Plugs compared
| # | Product | Best for | Number of items | Weight | Part number in title |
|---|---|---|---|---|---|
| 1 | Champion RC12YC Copper Plus Small Engine | Best overall | 1 (title says box of 6) | 0.66 pounds | RC12YC (71G) |
| 2 | Honda 98079-56846 (BPR6ES) | Best for Honda GCV160 and GCV190 engines | 1 | 0.05 pounds | 98079-56846 (BPR6ES) |
| 3 | Genuine Honda OEM 98079-55846 (NGK BPR5ES) | Best for a genuine OEM NGK part | 1 | 0.02 pounds | 98079-55846 (NGK BPR5ES) |
| 4 | Briggs & Stratton 796112S | Best replacement for older Briggs numbers | 1 | 0.1 pounds | 796112S |
| 5 | Champion RJ19LM (090-868) Cross-Reference | Best for matching cross-reference numbers | 2 | 0.13 pounds | 090-868 / RJ19LM |
| 6 | Briggs & Stratton 496018 2-Pack OHV | Best two-pack for OHV engines | 2 | 0.2 pounds | 496018 |
| 7 | Adefol F6TC 10-Pack for Honda GX Series | Best 10-pack for Honda GX-series engines | 1 (title says 10 pack) | Not listed | F6TC |
| 8 | GREPSPUD F7TC 4-Pack with Wrench | Best kit with a spark plug wrench | 5 (4 plugs plus wrench) | Not listed | F7TC |
How we chose
We compared manufacturer listings and specifications on Amazon as of November 2026. We did not test, install or run any of these plugs, so this roundup reflects only what each listing states.
We looked at whether each listing gives a part number we can match to a manual or an old plug, the pack size and listed number of items, the design features it describes, such as copper core electrodes or corrosion-protected shells, and whether it names engine models or genuine status. Where a listed dimension did not look like a plug’s size, we left it out rather than repeat it.
8 Best Lawn Mower Spark Plugs: our picks in detail
1. Best overall: Champion RC12YC Copper Plus Small Engine
Pros
- Copper core center electrode listed
- SAC-9 resistor for EMI and RFI suppression listed
- TinTac and ULTRASEAL shell for corrosion protection listed
- Part number RC12YC (71G) in the title
Cons
- Number of items (1) conflicts with the 6-plug title
- The listing does not name compatible engine or mower models
Our overall pick is the Champion RC12YC (71G) Copper Plus small engine spark plug. The listing title describes a box of 6 plugs, and the brand calls it dependable and durable. It states a copper core center electrode that allows accurate control of heat range for longer life.
The listing also describes a patented SAC-9 semi-conductor resistor for EMI and RFI suppression, and a TinTac and ULTRASEAL shell that the brand says offers the best corrosion protection of any spark plug in the industry. The listed number of items is 1, which does not match the title, so confirm the count before you order. The listing does not name specific engine or mower models, so match the RC12YC (71G) number to your manual.
Best for: Owners who want a copper core plug with listed corrosion protection and a part number they can match to their manual.
2. Best for Honda GCV160 and GCV190 engines: Honda 98079-56846 (BPR6ES)
Pros
- Named for Honda GCV160 and GCV190 engines
- Listed as OEM Honda retail packaging
- Part number 98079-56846 (BPR6ES) in title
Cons
- Fit is tied to the listed engine models, so confirm yours
- The listing does not mention plug design features beyond the brand
This Honda 98079-56846 (BPR6ES) small engine spark plug is listed for Honda GCV160 and GCV190 engines in its title. The listing describes it as a Honda lawn mower, small engine and tiller spark plug. The packaging is described as OEM Honda Made in Japan retail packaging.
The listing says you can depend on Honda for quality and reliability. Its listed weight is 0.05 pounds, and the number of items is 1. The listing does not mention a copper core, a resistor or any corrosion-protection design, so compare its features with the other plugs here. Confirm the part number against your engine manual before you buy.
Best for: Owners of Honda GCV160 or GCV190 engines who want a Honda-branded replacement with a part number that matches the title.
3. Best for a genuine OEM NGK part: Genuine Honda OEM 98079-55846 (NGK BPR5ES)
Pros
- Described as a genuine OEM NGK part
- Listed to fit most Honda small engines
- Listed to interchange with other small engines
Cons
- Listing asks you to check complete engine numbers first
- Listed dimension values look like packaging data, so rely on the part number
This listing is for a genuine Honda OEM spark plug, part 98079-55846, which the title says is the NGK BPR5ES. The listing states that it fits most Honda small engines and interchanges with other small engines that use these spark plugs. It describes itself as a genuine OEM NGK part.
The listing asks buyers to check their complete engine numbers against the description to confirm the correct part. The number of items is 1, the listed weight is 0.02 pounds, and the color is listed as black. Some listed dimension values do not look like plug dimensions, so we did not repeat them. The listing does not name specific engine models beyond the general Honda small engine fit.
Best for: Honda owners who want a plug described as a genuine OEM NGK part and who will check their engine numbers first.
4. Best replacement for older Briggs numbers: Briggs & Stratton 796112S
Pros
- Listed as a genuine Briggs and Stratton part
- Lists replaced numbers 4220, 8025925 and 796112
- Listed for most 093000 Briggs engines
Cons
- Fit is tied to Briggs engines and the listed cross-references
- The listing does not describe design features such as electrode material
This Briggs & Stratton 796112S spark plug is listed as a genuine Briggs & Stratton part. The listing says it replaces older Briggs numbers 4220, 8025925 and 796112, and that it is used on most 093000 Briggs & Stratton engines. For most buyers, the cross-reference numbers are the main detail to match.
The color is listed as white, the number of items is 1, and the listed weight is 0.1 pounds. The listing does not mention a copper core, a resistor, or any other design feature found in some plugs in this roundup. If your old plug carries one of the replaced numbers, check that cross-reference against your engine manual before you order.
Best for: Briggs and Stratton owners replacing an older plug that carries one of the listed cross-reference numbers.
5. Best for matching cross-reference numbers: Champion RJ19LM (090-868) Cross-Reference
Pros
- Long cross-reference list in the title
- Listed as a genuine Champion part
- Two plugs listed
Cons
- Compatibility depends on the cross-reference list, so verify it
- The listing does not describe design features
This Champion 090-868 (RJ19LM) spark plug is listed as a genuine Champion part. Its title includes a long cross-reference list of older part numbers, which can help if your current plug is marked with one of them. The listing tells buyers to refer to the list for compatibility.
The listing also says to consult your owner’s manual for proper part number identification and installation, which is good advice for any plug. The color is listed as black, the weight is 0.13 pounds, and the number of items is 2. The listing does not describe electrode or shell design beyond the brand name, so compare its features with other plugs here before deciding.
Best for: Owners who have an older plug marked with one of the listed cross-reference numbers and want to check a match.
6. Best two-pack for OHV engines: Briggs & Stratton 496018 2-Pack OHV
Pros
- Two plugs listed
- Listed for OHV engines
- Title lists replaced numbers 5066K and RC14YC
Cons
- Written for OHV engines only, so confirm your engine type
- Feature list is minimal, with no design details
This Briggs & Stratton 496018 spark plug comes as a 2 pack and is listed for OHV engines. The title says it replaces 5066K and RC14YC. The listing gives the part number 496018 as its only feature bullet.
Because the listing is short, the replacement numbers in the title are the main detail to check against your old plug. The color is listed as black and the weight is 0.2 pounds. The listing does not name specific engine models or describe electrode or shell design. Since it is written for OHV engines, confirm that your engine uses that design before you order.
Best for: Owners of OHV Briggs and Stratton engines who want two plugs and a part that replaces 5066K or RC14YC.
7. Best 10-pack for Honda GX-series engines: Adefol F6TC 10-Pack for Honda GX Series
Pros
- Ten plugs listed in one purchase
- Lists Honda GX and GCV engine compatibility
- Copper core and corrosion-resistant plating listed
Cons
- Ten plugs may exceed what one mower needs
- The long compatibility list spans many engine families, so check your manual
This Adefol F6TC spark plug is sold as a 10 pack. The listing states it is compatible with NGK BP6ES, Bosch W6D, Champion N9YC, Denso W20EP and IW20, Torch F6TC and Honda 98079-56841. It also lists many Honda GX and GCV engines and says the plug suits mini bikes, go karts, generators and lawn mowers.
The listing describes an outer insulator made of alumina silicate ceramic with corrosion-resistant plating, and a pure copper core that it says increases heat transfer. The listed thread diameter is 14mm, thread length 19mm and hex size 20.8mm. The listing states a refund if you are not satisfied. Weight is not listed, and the color field reads as a pack description rather than a color.
Best for: Honda GX-series owners who want a bulk pack of F6TC plugs and can confirm their engine against the long compatibility list.
8. Best kit with a spark plug wrench: GREPSPUD F7TC 4-Pack with Wrench
Pros
- Wrench included, listed at 180mm long
- Four plugs with a removable terminal nut listed
- Wide engine compatibility lists
Cons
- The listing does not say whether the plugs are OEM
- Compatibility lists are long, so confirm your engine model
This GREPSPUD listing is for four F7TC spark plugs with a spark plug wrench. The wrench is listed at 180mm long with a 21mm hex size, made of quality steel with zinc surface plating. The listing says the plugs have a removable terminal nut and operate over a wider heat range than ordinary plugs.
The listing says the plugs are compatible with most 4-stroke engines and includes long lists of Honda and Kawasaki parts and engine models, including GCV, GX and GXV series. It describes a satisfaction guarantee offering replacement or refund. The number of items is listed as 5, which matches four plugs plus the wrench. Weight is not listed, and the listing does not say whether the plugs are OEM.
Best for: Owners who want several spare plugs and a wrench in one listing, and who will confirm the F7TC fit for their engine.
How to choose the best lawn mower spark plugs
Start with the part number. Your owner’s manual or the old plug will list the number your engine needs, and the listing title should match it. Disconnect the spark plug wire before you work on the plug, and follow the manufacturer’s manual for the correct plug and for installation. If you are unsure, a small engine dealer or parts counter can help you confirm the number.
Next, look at the pack size. Single plugs suit an engine you maintain only occasionally, while multi-packs suit owners who keep spares on hand. Check whether a kit includes a wrench, since an included wrench is one less tool to find. Note the listed number of items, because a few listings in this roundup show a count that does not match the title.
Then read the features. Some listings describe a copper core center electrode, resistor suppression or corrosion-resistant shells. Others list only the brand and part number. Those details are worth comparing, but they do not replace the part number. If a listing says to check your engine numbers or your owner’s manual, do that first.
Finally, confirm genuine status and recalls. When a listing says it is a genuine or OEM part, that is the seller’s statement. You can check product recall notices at the U.S. Consumer Product Safety Commission recalls page. For upkeep habits, read How to Maintain a Lawn Mower and our guide to lawn mower maintenance tools.
What to look for
- A part number that matches your owner’s manual or the old plug
- The engine models named in the listing, if any
- Pack size and the listed number of items
- Whether a wrench is included
- Listed design features, such as a copper core or corrosion-protected shell
- Whether the listing says genuine or OEM
FAQ
How do I find the right spark plug for my mower?
Check your owner’s manual first, since it lists the part number for your engine. You can also compare the number on your old plug with the cross-reference lists in each listing. If the numbers still do not match, ask a small engine dealer to confirm.
Can I replace a spark plug myself?
Many owners do this task, but you should follow the manufacturer’s manual for the procedure and the correct plug. Disconnect the spark plug wire before you start. If you are not comfortable with the job, have a qualified technician do it.
Does a multi-pack make sense?
It depends on how many spares you want to keep. Check the listed number of items, and remember that some listings show a count that differs from the title. A single plug may be enough if you only need one replacement.
References
- Amazon product listings and manufacturer specifications (accessed November 2026)
- U.S. Consumer Product Safety Commission, Recalls
