Engine & Drive Parts
-
On Sale
NGK Spark Plugs 5728 Spark Plug 5728
NGK Spark Plugs
$4.79 $1.86NGK Spark Plugs 5728 Spark Plug 5728Chosen 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-BMR4A
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5728
- Pack:
- 10
- Pkg.:
- Boxed
$4.79 $1.86 -
Sold Out, please call for ETA.
NGK Spark Plugs 5827 Spark Plug 5827
NGK Spark Plugs
$10.59 $9.25NGK Spark Plugs 5827 Spark Plug 5827Racing plugs feature a center electrode with a V-groove and a thicker ceramic shell for the high-heat applications in racing engines.Special center electrode...- Part Number:
- 41-B9EGV
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5827
- Pack:
- 4
$10.59 $9.25 -
NGK Spark Plugs 5913 Spark Plug 5913
NGK Spark Plugs
$8.19 $4.97NGK Spark Plugs 5913 Spark Plug 5913 V-Power plugs offer economical performance and improved ignitability over nickel spark plugs. OEM and racer approved. Lowers ignition system voltage...- Part Number:
- 41-ZFR7F
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5913
- What's in the Box:
- (1) Spark Plug
$8.19 $4.97 -
NGK Spark Plugs 5946 Plug Yam Atv 5946
NGK Spark Plugs
$21.99 $14.09NGK Spark Plugs 5946 Plug Yam Atv 5946Chosen 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-LMAR6A9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 5946
- Pack:
- 10
- Pkg.:
- Boxed
$21.99 $14.09 -
Sold Out, please call for ETA.
NGK Spark Plugs 6289 Spark Plug 6289
NGK Spark Plugs
$20.79 $14.30NGK Spark Plugs 6289 Spark Plug 6289Original 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-CR9EIA9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6289
- Pack:
- 4
$20.79 $14.30 -
NGK Spark Plugs 6364 Spark Plug #6364
NGK Spark Plugs
$6.39 $4.33NGK Spark Plugs 6364 Spark Plug #6364Chosen 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-BKR6ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6364
- Pack:
- 4
- Pkg.:
- Boxed
$6.39 $4.33 -
NGK Spark Plugs 6500 Spark Plug 6500
NGK Spark Plugs
$6.39 $4.32NGK Spark Plugs 6500 Spark Plug 6500Chosen 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-CR6HSB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6500
- Pack:
- 10
- Pkg.:
- Boxed
$6.39 $4.32 -
NGK Spark Plugs 6502 Spark Plug 6502
NGK Spark Plugs
$30.29 $19.58NGK Spark Plugs 6502 Spark Plug 6502Original 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-IFR5L11
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6502
- Pack:
- 4
$30.29 $19.58 -
NGK Spark Plugs 6544 Spark Plug 6544
NGK Spark Plugs
$30.69 $16.85NGK Spark Plugs 6544 Spark Plug 6544Original 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-IMR9D9H
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6544
- Pack:
- 4
$30.69 $16.85 -
NGK Spark Plugs 6684 Iridium Ix Spk Plug Bpr8Eix
NGK Spark Plugs
$18.39 $12.27NGK Spark Plugs 6684 Iridium Ix Spk Plug Bpr8EixDesigned specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling...- Part Number:
- 41-BPR8EIX
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6684
- Pack:
- 4
$18.39 $12.27 -
NGK Spark Plugs 6689 Spark Plug 6689
NGK Spark Plugs
$21.79 $11.58NGK Spark Plugs 6689 Spark Plug 6689Chosen 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-CR5EH9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6689
- Pack:
- 10
- Pkg.:
- Boxed
$21.79 $11.58 -
NGK Spark Plugs 6775 Spark Plug 6775
NGK Spark Plugs
$6.50 $4.12NGK Spark Plugs 6775 Spark Plug 6775Chosen 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-BPR6ESBLYB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6775
- Pack:
- 6
- Pkg.:
- Blister
$6.50 $4.12 -
Sold Out, please call for ETA.
NGK Spark Plugs 6928 Spark Plug 6928
NGK Spark Plugs
$4.19NGK Spark Plugs 6928 Spark Plug 6928Chosen 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-BP4ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6928
- Pack:
- 4
- Pkg.:
- Boxed
$4.19 -
NGK Spark Plugs 6962 Spark Plug 6962
NGK Spark Plugs
$7.09 $4.52NGK Spark Plugs 6962 Spark Plug 6962V-Power plugs offer economical performance and improved ignitability over nickel spark plugs. OEM and racer approved.Lowers ignition system voltage...- Part Number:
- 41-BKR6E
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6962
- Pack:
- 4
- Pkg.:
- Boxed
$7.09 $4.52 -
NGK Spark Plugs 7023 Spark Plug 7023
NGK Spark Plugs
$6.69 $4.52NGK Spark Plugs 7023 Spark Plug 7023Chosen 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-CR6HS
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7023
- Pack:
- 10
- Pkg.:
- Boxed
$6.69 $4.52 -
NGK Spark Plugs 7052 Spark Plug 7052
NGK Spark Plugs
$6.89 $4.47NGK Spark Plugs 7052 Spark Plug 7052V-Power plugs offer economical performance and improved ignitability over nickel spark plugs. OEM and racer approved.Lowers ignition system voltage...- Part Number:
- 41-YR5
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7052
- Pack:
- 4
- Pkg.:
- Boxed
$6.89 $4.47 -
NGK Spark Plugs 7112 Spark Plug 7112
NGK Spark Plugs
$6.59 $4.47NGK Spark Plugs 7112 Spark Plug 7112Chosen 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-D8HA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7112
- Pack:
- 10
- Pkg.:
- Boxed
$6.59 $4.47 -
NGK Spark Plugs 7162 Spark Plug 7162
NGK Spark Plugs
$6.69 $4.52NGK Spark Plugs 7162 Spark Plug 7162Chosen 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-DR8EA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7162
- Pack:
- 10
- Pkg.:
- Boxed
$6.69 $4.52 -
NGK Spark Plugs 7222 Spark Plug 7222
NGK Spark Plugs
$6.27 $3.99NGK Spark Plugs 6578 Spark Plug Standard spark plugs are chosen by more automotive, motorcycle and marine engine manufacturers than any other. The unique copper core and exclusive electrode design...- Part Number:
- 41-BPR4ESSOLID
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7222
- Pack:
- 4
- Pkg.:
- Boxed
$6.27 $3.99 -
NGK Spark Plugs 7331 Spark Plug 7331
NGK Spark Plugs
$6.19 $4.29NGK Spark Plugs 7331 Spark Plug 7331Chosen 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-BP6HS
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7331
- Pack:
- 4
- Pkg.:
- Boxed
$6.19 $4.29
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.