Engine & Drive Parts
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NGK Spark Plugs Lfr5A 11 Spark Plug 6376
NGK Spark Plugs
$16.73 $9.84NGK 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...- Part Number:
- 41-6376
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- LFR5A-11
- Pack:
- 4
- Pkg.:
- Boxed
$16.73 $9.84 -
NGK Spark Plugs 3579 Spark Plug 3579
NGK Spark Plugs
$12.09 $7.60NGK Spark Plugs 3579 Spark Plug 3579 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-BZ7HS10
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3579
- Pkg.:
- Boxed
$12.09 $7.60 -
NGK Spark Plugs 6994 Spark Plug 6994
NGK Spark Plugs
$27.79 $17.83NGK 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 $17.83 -
Sold Out, please call for ETA.
NGK Spark Plugs 7692 Spark Plug Mr8Ai9
NGK Spark Plugs
$19.99 $15.23NGK 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:
- Out of Stock - Call 856-232-6969 for availability.
- Model #:
- 7692
- Pack:
- 4
$19.99 $15.23 -
NGK Spark Plugs BR9EYA Spark Plug 7548
NGK Spark Plugs
$9.52 $6.09NGK Spark Plugs 7548 Spark Plug 7548 Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode...- Part Number:
- 41-7548
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7548
- Pkg.:
- Boxed
$9.52 $6.09 -
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 $5.81NGK 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 $5.81 -
NGK Spark Plugs 5899 Spark Plug 5899
NGK Spark Plugs
$30.89 $19.87NGK 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 $19.87 -
NGK Spark Plugs Bp7Hs-10 Spark Plug 7829
NGK Spark Plugs
$6.51 $4.12NGK 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 $4.12 -
NGK Spark Plugs CR7HSA Spark Plug 4549
NGK Spark Plugs
$6.58 $4.99NGK Spark Plugs 4549 Spark Plug 4549 Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode...- Part Number:
- 41-4549
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 4549
- Pkg.:
- Boxed
$6.58 $4.99 -
NGK Spark Plugs CR9EB Spark Plug 6955
NGK Spark Plugs
$15.83 $8.09NGK Spark Plugs CR9EB Spark Plug 6955 Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode...- Part Number:
- 41-6955
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6955
- Pack:
- 10
- Pkg.:
- Boxed
$15.83 $8.09 -
NGK Spark Plugs 2522 Spark Plug 2522
NGK Spark Plugs
$11.29 $7.12NGK 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 $7.12 -
NGK Spark Plugs 3180 Spark Plug 3180
NGK Spark Plugs
$21.99 $11.99NGK Spark Plugs 3180 Spark Plug 3180 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-BPZ8HS15
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 3180
- Pkg.:
- Boxed
$21.99 $11.99 -
NGK Spark Plugs 4055 Spark Plug 4055
NGK Spark Plugs
$18.29 $11.77NGK 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 $11.77 -
NGK Spark Plugs 7696 Spark Plug Las-Plat 7696
NGK Spark Plugs
$25.89 $16.53NGK 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 $16.53 -
NGK Spark Plugs 7734 Spark Plug 7734
NGK Spark Plugs
$6.39 $4.33NGK 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...- Part Number:
- 41-BPR5ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7734
- Pack:
- 4
- Pkg.:
- Boxed
$6.39 $4.33 -
Sold Out, please call for ETA.
NGK Spark Plugs 95897 Spark Plug 95897
NGK Spark Plugs
$18.09 $13.74NGK 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:
- Out of Stock - Call 856-232-6969 for availability.
- Model #:
- 95897
- Pack:
- 10
- Pkg.:
- Boxed
$18.09 $13.74 -
Sold Out, please call for ETA.
NGK Spark Plugs 3035 Spark Plug 3035
NGK Spark Plugs
$19.03NGK 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:
- Out of Stock - Call 856-232-6969 for availability.
- Model #:
- 3035
- Pack:
- 10
- Pkg.:
- Boxed
$19.03 -
Sold Out, please call for ETA.
NGK Spark Plugs 5044 Spark Plug Iriduim 5044
NGK Spark Plugs
$18.49 $14.52NGK 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
- Model #:
- 5044
$18.49 $14.52 -
Sold Out, please call for ETA.
NGK Spark Plugs 93322 Spark Plug 93322
NGK Spark Plugs
$47.39 $27.44NGK Spark Plugs 93322 Spark Plug 93322- Part Number:
- 41-PFR7AB
- Availability:
- Out of Stock - Call 856-232-6969 for availability.
- Model #:
- 93322
- Pack:
- 4
$47.39 $27.44
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.