Engine & Drive Parts
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NGK Spark Plugs 7131 Spark Plug 7131
NGK Spark Plugs
$5.49 $3.95NGK Spark Plugs 7131 Spark Plug 7131Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-BPR6ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7131
- Pack:
- 4
- Pkg.:
- Boxed
$5.49 $3.95 -
NGK Spark Plugs Bpr8Es Spark Plug 3923
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Bpr8Es Spark Plug 3923Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-3923
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BPR8ES
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs 4838 Spark Plug 4838
NGK Spark Plugs
$6.19 $4.21NGK Spark Plugs 4838 Spark Plug 4838 Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life. •?Triple gasket sealing...- Part Number:
- 41-BP8HN10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4838
- Pack:
- 1
- Pkg.:
- Boxed
$6.19 $4.21 -
NGK Spark Plugs 2771 Spark Plug 2771
NGK Spark Plugs
$6.29 $4.08NGK Spark Plugs 2771 Spark Plug 2771V-Power plugs offer economical performance and improved ignitability over nickel spark plugs. OEM and racer approved.Lowers ignition system voltage requirementsIncreased fuel economyHigh durability resists electrical...- Part Number:
- 41-UR5
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 2771
- Pack:
- 4
- Pkg.:
- Boxed
$6.29 $4.08 -
NGK Spark Plugs 4363 Spark Plug 4363
NGK Spark Plugs
$25.69 $13.35NGK Spark Plugs 4363 Spark Plug 4363Original equipment on many late model applicationsPlatinum at the fine-wire center electrode as well as at the ground electrode provides extended service lifeThe platinum at the ground electrode adds extra protection...- Part Number:
- 41-PZFR5F11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4363
- Pack:
- 4
$25.69 $13.35 -
NGK Spark Plugs 7447 Spark Plug Buz8H
NGK Spark Plugs
$19.79 $10.26NGK Spark Plugs 7447 Spark Plug Buz8HChosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-BUZ8H
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7447
- Pack:
- 10
- Pkg.:
- Boxed
$19.79 $10.26 -
NGK Spark Plugs Bkr6Eku Spark Plug 6993
NGK Spark Plugs
$16.59 $8.19NGK Spark Plugs Bkr6Eku Spark Plug 6993Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-6993
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BKR6EKU
- Pack:
- 4
- Pkg.:
- Boxed
$16.59 $8.19 -
NGK Spark Plugs Br10Es Solid Spark Plug 4684
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Br10Es Solid Spark Plug 4684Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing...- Part Number:
- 41-4684
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BR10ES Solid
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs Br8Es-11 Spark Plug 7986
NGK Spark Plugs
$5.89 $4.13NGK Spark Plugs Br8Es-11 Spark Plug 7986Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-BR8ES11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7986
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.13 -
NGK Spark Plugs Br9Es Solid Spark Plug 3194
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Br9Es Solid Spark Plug 3194Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-3194
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BR9ES Solid
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs Lfr6A 11 Spark Plug 3672
NGK Spark Plugs
$14.99 $7.70NGK Spark Plugs Lfr6A 11 Spark Plug 3672Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-3672
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- LFR6A-11
- Pack:
- 4
- Pkg.:
- Boxed
$14.99 $7.70 -
NGK Spark Plugs Br8Es Spark Plug 5422
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Br8Es Spark Plug 5422Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-5422
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BR8ES
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs Lfr5A 11 Spark Plug 6376
NGK Spark Plugs
$15.09 $8.00NGK Spark Plugs Lfr5A 11 Spark Plug 6376Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-6376
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- LFR5A-11
- Pack:
- 4
- Pkg.:
- Boxed
$15.09 $8.00 -
NGK Spark Plugs 6994 Spark Plug 6994
NGK Spark Plugs
$26.99 $13.68NGK Spark Plugs 6994 Spark Plug 6994Original equipment on many late model applicationsIridium at the fine-wire center electrode and platinum at the ground electrode provides maximum durability and performanceThe platinum at the ground electrode adds...- Part Number:
- 41-IZFR6K11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6994
- Pack:
- 4
$26.99 $13.68 -
Sold Out, please call for ETA.
NGK Spark Plugs 7692 Spark Plug Mr8Ai9
NGK Spark Plugs
$19.99 $10.66NGK Spark Plugs 7692 Spark Plug Mr8Ai9Original equipment on many late model applicationsIridium at the fine-wire center electrode and platinum at the ground electrode provides maximum durability and performanceThe platinum at the ground electrode adds...- Part Number:
- 41-MR8AI9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7692
- Pack:
- 4
$19.99 $10.66 -
NGK Spark Plugs B7Hs Spark Plug 5110
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs B7Hs Spark Plug 5110Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-5110
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- B7HS
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs 5539 Spark Plug Br8Hsa Br8Hsa
NGK Spark Plugs
$5.89 $4.13NGK Spark Plugs 5539 Spark Plug Br8Hsa Br8HsaChosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing...- Part Number:
- 41-BR8HSA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5539
- Pack:
- 10
- Pkg.:
- Boxed
$5.89 $4.13 -
NGK Spark Plugs 713 Spark Plug Shop Pack 713
NGK Spark Plugs
$140.19 $64.75NGK Spark Plugs 713 Spark Plug Shop Pack 713- Part Number:
- 41-BR8ESSP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 713
- Type:
- Standard
- Pack:
- 25
$140.19 $64.75 -
NGK Spark Plugs Bp7Hs-10 Spark Plug 7829
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Bp7Hs-10 Spark Plug 7829Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-7829
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BP7HS-10
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
Sold Out, please call for ETA.
NGK Spark Plugs 1006 Spark Plug Shop Pack 1006
NGK Spark Plugs
$140.19 $89.93NGK Spark Plugs 1006 Spark Plug Shop Pack 1006- Part Number:
- 41-BPR6EFSSP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 1006
- Type:
- Standard
- Pack:
- 25
$140.19 $89.93
Spark Plugs for Power Boats
Keep your engine performing at its best with high-quality boat spark plugs designed for outboards, inboards, and sterndrives. At PowerBoatSupply.com, we carry a full selection of NGK spark plugs, AC Delco spark plugs, and other trusted marine brands to fit a wide variety of engines. Whether you’re replacing a single spark plug for a boat motor or outfitting an entire set, you’ll find durable, OEM-recommended options that deliver reliable ignition, smooth starts, and long-lasting performance on the water.
Why Spark Plugs Matter for Marine Engines
Spark plugs are a small but critical part of your boat’s ignition system. They provide the spark that ignites the fuel-air mixture, powering your engine forward. Worn or fouled boat motor spark plugs can lead to misfires, poor fuel economy, hard starts, or even engine damage. That’s why routine replacement with the right spark plug type is essential for keeping your boat running smoothly all season long.
Our Spark Plug Selection
We stock a wide range of marine spark plugs to cover all your needs, including:
- Standard spark plugs – affordable and dependable for routine use
- V-Power spark plugs – improved ignitability for better performance
- Iridium spark plugs – advanced durability and longer service life
- OEM-specific plugs – designed to fit Mercury, MerCruiser, and other popular marine engines
From Mercury outboards to MerCruiser sterndrives, our inventory includes the correct Mercury boat motor spark plugs to keep your engine running at peak efficiency.
When to Replace Your Spark Plugs
Most marine experts recommend inspecting and replacing spark plugs every season, or at least every 100 hours of operation. Signs that your plugs need replacement include difficulty starting, engine hesitation, reduced fuel efficiency, or visible carbon buildup on the electrodes. Swapping them out regularly is an inexpensive way to protect your boat engine and prevent costly repairs.
Shop Spark Plugs Online With Confidence
PowerBoatSupply.com makes it easy to find the exact boat spark plugs you need. With fast shipping, competitive pricing, and our decades of marine parts experience, we’re your trusted source for boat motor spark plugs and engine tune-up parts. Order today and get back on the water with confidence.