Engine & Drive Parts
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NGK Spark Plugs 6994 Spark Plug 6994
NGK Spark Plugs
$27.79 $15.20NGK 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...- Part Number:
- 41-IZFR6K11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6994
- Pack:
- 4
$27.79 $15.20 -
Sold Out, please call for ETA.
NGK Spark Plugs 7692 Spark Plug Mr8Ai9
NGK Spark Plugs
$19.99 $12.53NGK 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...- Part Number:
- 41-MR8AI9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7692
- Pack:
- 4
$19.99 $12.53 -
NGK Spark Plugs 3754 Spark Plug 3754
NGK Spark Plugs
$6.89 $4.49NGK Spark Plugs 3754 Spark Plug 3754 V-Power plugs offer economical performance and improved ignitability over nickel spark plugs. OEM and racer approved. Lowers ignition system voltage...- Part Number:
- 41-TR4
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3754
- Pkg.:
- Boxed
$6.89 $4.49 -
NGK Spark Plugs 5539 Spark Plug Br8Hsa Br8Hsa
NGK Spark Plugs
$6.69 $5.36NGK 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...- Part Number:
- 41-BR8HSA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5539
- Pack:
- 10
- Pkg.:
- Boxed
$6.69 $5.36 -
NGK Spark Plugs 5899 Spark Plug 5899
NGK Spark Plugs
$30.89 $17.15NGK Spark Plugs 5899 Spark Plug 5899 Original equipment on many late model applications Iridium at the fine-wire center electrode and platinum at the ground electrode provides maximum...- Part Number:
- 41-IZFR5J
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5899
$30.89 $17.15 -
NGK Spark Plugs Bp7Hs-10 Spark Plug 7829
NGK Spark Plugs
$6.51 $4.10NGK 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...- Part Number:
- 41-7829
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BP7HS-10
- Pack:
- 4
- Pkg.:
- Boxed
$6.51 $4.10 -
NGK Spark Plugs 2522 Spark Plug 2522
NGK Spark Plugs
$11.29 $6.48NGK Spark Plugs 2522 Spark Plug 2522Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-BUHX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 2522
- Pack:
- 10
- Pkg.:
- Boxed
$11.29 $6.48 -
NGK Spark Plugs 4055 Spark Plug 4055
NGK Spark Plugs
$18.29 $10.90NGK Spark Plugs 4055 Spark Plug 4055Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.Fine-tipped...- Part Number:
- 41-BPR7EIX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4055
- Pack:
- 4
$18.29 $10.90 -
NGK Spark Plugs 7696 Spark Plug Las-Plat 7696
NGK Spark Plugs
$25.89 $14.31NGK Spark Plugs 7696 Spark Plug Las-Plat 7696Original equipment on many late model applicationsPlatinum at the fine-wire center electrode as well as at the ground electrode provides extended service...- Part Number:
- 41-PZFR6H
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7696
- Pack:
- 4
$25.89 $14.31 -
Sold Out, please call for ETA.
NGK Spark Plugs 95897 Spark Plug 95897
NGK Spark Plugs
$18.09 $11.43NGK Spark Plugs 95897 Spark Plug 95897Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-MR7F
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 95897
- Pack:
- 10
- Pkg.:
- Boxed
$18.09 $11.43 -
Sold Out, please call for ETA.
NGK Spark Plugs 3035 Spark Plug 3035
NGK Spark Plugs
$21.01NGK Spark Plugs 3035 Spark Plug 3035Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-BR8ECM
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3035
- Pack:
- 10
- Pkg.:
- Boxed
$21.01 -
NGK Spark Plugs 5044 Spark Plug Iriduim 5044
NGK Spark Plugs
$18.49 $12.49NGK Spark Plugs 5044 Spark Plug Iriduim 5044 Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling...- Part Number:
- 41-BR8EIX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5044
$18.49 $12.49 -
Sold Out, please call for ETA.
NGK Spark Plugs 93322 Spark Plug 93322
NGK Spark Plugs
$47.39 $24.23NGK Spark Plugs 93322 Spark Plug 93322- Part Number:
- 41-PFR7AB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 93322
- Pack:
- 4
$47.39 $24.23 -
NGK Spark Plugs Bp6Hs-10 Spark Plug 6326
NGK Spark Plugs
$6.51 $4.10NGK Spark Plugs Bp6Hs-10 Spark Plug 6326 Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-6326
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- BP6HS-10
- Pkg.:
- Boxed
$6.51 $4.10 -
NGK Spark Plugs Spark Plug #4218 Cr8Eix
NGK Spark Plugs
$18.49 $12.49NGK Spark Plugs Spark Plug #4218 Cr8Eix Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling...- Part Number:
- 41-CR8EIX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4218
$18.49 $12.49 -
NGK Spark Plugs Sparkplug 2120
NGK Spark Plugs
$6.59 $4.47NGK Spark Plugs Sparkplug 2120 Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak performance...- Part Number:
- 41-D8EA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- D8EA
- Pkg.:
- Boxed
$6.59 $4.47 -
NGK Spark Plugs 1068 Spark Plug 1068 Dp6Ea9
NGK Spark Plugs
$6.59 $4.47NGK Spark Plugs 1068 Spark Plug 1068 Dp6Ea9Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-DP6EA9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 1068
- Pack:
- 10
- Pkg.:
- Boxed
$6.59 $4.47 -
NGK Spark Plugs 1090 Spark Plug 1090
NGK Spark Plugs
$6.59 $4.50NGK Spark Plugs 1090 Spark Plug 1090Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-BR6HS10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 1090
- Pack:
- 10
- Pkg.:
- Boxed
$6.59 $4.50 -
NGK Spark Plugs 1092 Spark Plug 1092
NGK Spark Plugs
$6.69 $4.52NGK Spark Plugs 1092 Spark Plug 1092Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-BPR7HS10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 1092
- Pack:
- 10
- Pkg.:
- Boxed
$6.69 $4.52 -
Sold Out, please call for ETA.
NGK Spark Plugs 1466 Spark Plug 1466
NGK Spark Plugs
$34.99 $23.17NGK Spark Plugs 1466 Spark Plug 1466Chosen by more automotive, and marine engine manufacturers than any other. The unique copper core and exclusive electrode design assure fast starts, peak...- Part Number:
- 41-BR8HSBLYB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 1466
- Pack:
- 6
- Pkg.:
- Blister
$34.99 $23.17
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.