Engine & Drive Parts
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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 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 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 -
Sold Out, please call for ETA.
NGK Spark Plugs Ifr9H11 #6588 Sparkplug Ifr9H11
NGK Spark Plugs
$24.69 $0.00NGK Spark Plugs Ifr9h21 #6588 Sparkplug Ifr9h21Original 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...- Part Number:
- 41-IFR9H11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6588
$24.69 $0.00 -
NGK Spark Plugs Spark Plug #2202 Dpr8Eix9
NGK Spark Plugs
$17.29 $9.36NGK Spark Plugs Spark Plug #2202 Dpr8Eix9Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.Fine-tipped iridium-center electrode ensures high durability and...- Part Number:
- 41-DPR8EIX9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 2202
- Pack:
- 4
$17.29 $9.36 -
NGK Spark Plugs Spark Plug #4374 Cr8Ekb
NGK Spark Plugs
$19.79 $10.26NGK Spark Plugs Spark Plug #4374 Cr8EkbChosen 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-CR8EKB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4374
- Pack:
- 10
- Pkg.:
- Boxed
$19.79 $10.26 -
Sold Out, please call for ETA.
NGK Spark Plugs Spark Plug 4172 4172
NGK Spark Plugs
$16.59 $8.43NGK Spark Plugs Spark Plug 4172 4172Chosen 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-BR8ECS
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4172
- Pack:
- 10
- Pkg.:
- Boxed
$16.59 $8.43 -
NGK Spark Plugs Spark Plug 6046
NGK Spark Plugs
$17.29 $9.59NGK Spark Plugs Spark Plug 6046 Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. Fine-tipped iridium-center electrode ensures high durability...- Part Number:
- 41-DCPR7EIX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6046
$17.29 $9.59 -
Sold Out, please call for ETA.
NGK Spark Plugs Spark Plug D7Ea
NGK Spark Plugs
$5.89 $4.13NGK Spark Plugs Spark Plug D7EaChosen 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 eliminates...- Part Number:
- 41-D7EA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- D7EA
- Pack:
- 10
- Pkg.:
- Boxed
$5.89 $4.13 -
NGK Spark Plugs Sparkplug 6953
NGK Spark Plugs
$6.29 $4.08NGK Spark Plugs Sparkplug 6953V-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 and...- Part Number:
- 41-BKR5E11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6953
- Pack:
- 4
- Pkg.:
- Boxed
$6.29 $4.08
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.