Engine & Drive Parts
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NGK Spark Plugs 7734 Spark Plug 7734
NGK Spark Plugs
$5.49 $3.95NGK Spark Plugs 7734 Spark Plug 7734Chosen 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-BPR5ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7734
- Pack:
- 4
- Pkg.:
- Boxed
$5.49 $3.95 -
Sold Out, please call for ETA.
NGK Spark Plugs 7784 Spark Plug 7784
NGK Spark Plugs
$14.79 $7.61NGK Spark Plugs 7784 Spark Plug 7784Chosen 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-CR8EB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7784
- Pack:
- 10
- Pkg.:
- Boxed
$14.79 $7.61 -
NGK Spark Plugs 7823 Spark Plug 7823
NGK Spark Plugs
$5.49 $3.95NGK Spark Plugs 7823 Spark Plug 7823Chosen 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-BPR4HS
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7823
- Pack:
- 10
- Pkg.:
- Boxed
$5.49 $3.95 -
Sold Out, please call for ETA.
NGK Spark Plugs 7829 Spark Plug Bp7Hs10
NGK Spark Plugs
$0.00NGK Spark Plugs 7829 Spark Plug Bp7Hs10Chosen 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-BP7HS10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7829
- Pack:
- 4
- Pkg.:
- Boxed
$0.00 -
NGK Spark Plugs 7839 Spark Plug 7839
NGK Spark Plugs
$5.89 $4.13NGK Spark Plugs 7839 Spark Plug 7839Chosen 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-DR7EA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7839
- Pack:
- 10
- Pkg.:
- Boxed
$5.89 $4.13 -
Sold Out, please call for ETA.
NGK Spark Plugs 7840 Spark Plug Cr5Hsa
NGK Spark Plugs
$0.00NGK Spark Plugs 7840 Spark Plug Cr5HsaChosen 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-CR5HSA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7840
- Pack:
- 10
- Pkg.:
- Boxed
$0.00 -
NGK Spark Plugs 7901 Spark Plug 7901
NGK Spark Plugs
$29.29 $14.74NGK Spark Plugs 7901 Spark Plug 7901Original 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-IJR7A9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7901
- Pack:
- 4
$29.29 $14.74 -
Sold Out, please call for ETA.
NGK Spark Plugs 7928 Spark Plug 7928
NGK Spark Plugs
$3.99 $2.04NGK Spark Plugs 7928 Spark Plug 7928Chosen 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-B10ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7928
- Pack:
- 4
- Pkg.:
- Boxed
$3.99 $2.04 -
NGK Spark Plugs 7938 Spark Plug 7938
NGK Spark Plugs
$6.29 $3.91NGK Spark Plugs 7938 Spark Plug 7938V-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-BKR5E
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7938
- Pack:
- 4
- Pkg.:
- Boxed
$6.29 $3.91 -
NGK Spark Plugs 90537 Spark Plug V-Power 90537
NGK Spark Plugs
$16.39 $7.55NGK Spark Plugs 90537 Spark Plug V-Power 90537V-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...- Part Number:
- 41-LFR6A11BLYB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 90537
- Pack:
- 6
- Pkg.:
- Blister
$16.39 $7.55 -
NGK Spark Plugs 92482 Spark Plug 92482
NGK Spark Plugs
$6.39 $4.25NGK Spark Plugs 92482 Spark Plug 92482Chosen 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-DPR6EA9BLYB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 92482
- Pack:
- 6
- Pkg.:
- Blister
$6.39 $4.25 -
Sold Out, please call for ETA.
NGK Spark Plugs 94841 Spark Plug 94841
NGK Spark Plugs
$6.79 $0.00NGK Spark Plugs 94841 Spark Plug 94841Chosen 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-GR9AEG
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 94841
- Pack:
- 10
- Pkg.:
- Boxed
$6.79 $0.00 -
NGK Spark Plugs 95945 Spark Plug V-Power 95945
NGK Spark Plugs
$15.89 $8.56NGK Spark Plugs 95945 Spark Plug V-Power 95945V-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...- Part Number:
- 41-LFR5A11BLYB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 95945
- Pack:
- 6
- Pkg.:
- Blister
$15.89 $8.56 -
NGK Spark Plugs 96530 Spark Plug 96530
NGK Spark Plugs
$8.69 $3.79NGK Spark Plugs 96530 Spark Plug 96530Chosen 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-DCPR6EBLYB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 96530
- Pack:
- 6
- Pkg.:
- Blister
$8.69 $3.79 -
Sold Out, please call for ETA.
NGK Spark Plugs B9Hs Spark Plug 5810
NGK Spark Plugs
$4.19 $0.00NGK Spark Plugs B9Hs Spark Plug 5810Chosen 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:
- 41-5810
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- B9HS
- Pack:
- 4
- Pkg.:
- Boxed
$4.19 $0.00 -
NGK Spark Plugs Bp6Hs-10 Spark Plug 6326
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Bp6Hs-10 Spark Plug 6326Chosen 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:
- 41-6326
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BP6HS-10
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs Bpr5Es11 Sparkplug 7634
NGK Spark Plugs
$5.99 $4.08NGK Spark Plugs Bpr5Es11 Sparkplug 7634Chosen 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-BPR5ES11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BPR5ES-11
- Pack:
- 4
- Pkg.:
- Boxed
$5.99 $4.08 -
NGK Spark Plugs Br9Es Spark Plug 5722
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Br9Es Spark Plug 5722Chosen 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:
- 41-5722
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BR9ES
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06 -
NGK Spark Plugs Cpr8Eb9 Spark Plug Cpr8Eb9
NGK Spark Plugs
$14.79 $7.61NGK Spark Plugs Cpr8Eb9 Spark Plug Cpr8Eb9Chosen 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-CPR8EB9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- CPR8EB-9
- Pack:
- 10
- Pkg.:
- Boxed
$14.79 $7.61 -
NGK Spark Plugs Cr6Hsa Spark Plug 2983
NGK Spark Plugs
$5.89 $4.06NGK Spark Plugs Cr6Hsa Spark Plug 2983Chosen 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:
- 41-2983
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- CR6HSA
- Pack:
- 4
- Pkg.:
- Boxed
$5.89 $4.06
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.