Engine & Drive Parts
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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 performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-BP4ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6928
- Pack:
- 4
- Pkg.:
- Boxed
$4.19 -
Sold Out, please call for ETA.
NGK Spark Plugs 6955 Spark Plug 6955
NGK Spark Plugs
$0.00NGK Spark Plugs 6955 Spark Plug 6955Chosen 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-CR9EB
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6955
- Pack:
- 10
- Pkg.:
- Boxed
$0.00 -
NGK Spark Plugs 6962 Spark Plug 6962
NGK Spark Plugs
$6.29 $4.08NGK 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 requirementsIncreased fuel economyHigh durability resists electrical...- Part Number:
- 41-BKR6E
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 6962
- Pack:
- 4
- Pkg.:
- Boxed
$6.29 $4.08 -
Sold Out, please call for ETA.
NGK Spark Plugs 701 Spark Plug Shop Pack 701
NGK Spark Plugs
$124.39 $55.96NGK Spark Plugs 701 Spark Plug Shop Pack 701- Part Number:
- 41-BUHWSP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 701
- Type:
- Standard
- Pack:
- 25
$124.39 $55.96 -
Sold Out, please call for ETA.
NGK Spark Plugs 702 Spark Plug Shop Pack 702
NGK Spark Plugs
$124.39 $63.23NGK Spark Plugs 702 Spark Plug Shop Pack 702- Part Number:
- 41-BUHW2SP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 702
- Type:
- Standard
- Pack:
- 25
$124.39 $63.23 -
NGK Spark Plugs 7023 Spark Plug 7023
NGK Spark Plugs
$5.89 $4.13NGK 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 performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-CR6HS
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7023
- Pack:
- 10
- Pkg.:
- Boxed
$5.89 $4.13 -
NGK Spark Plugs 703 Spark Plug Shop Pack 703
NGK Spark Plugs
$165.99 $76.49NGK Spark Plugs 703 Spark Plug Shop Pack 703- Part Number:
- 41-BU8HSP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 703
- Type:
- Standard
- Pack:
- 25
$165.99 $76.49 -
NGK Spark Plugs 704 Spark Plug Shop Pack 704
NGK Spark Plugs
$140.19 $64.75NGK Spark Plugs 704 Spark Plug Shop Pack 704- Part Number:
- 41-B7HS10SP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 704
- Type:
- Standard
- Pack:
- 25
$140.19 $64.75 -
Sold Out, please call for ETA.
NGK Spark Plugs 705 Spark Plug Shop Pack 705
NGK Spark Plugs
$140.19 $64.75NGK Spark Plugs 705 Spark Plug Shop Pack 705- Part Number:
- 41-B8HS10SP
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 705
- Type:
- Standard
- Pack:
- 25
$140.19 $64.75 -
NGK Spark Plugs 7052 Spark Plug 7052
NGK Spark Plugs
$6.29 $4.08NGK 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 requirementsIncreased fuel economyHigh durability resists electrical...- Part Number:
- 41-YR5
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7052
- Pack:
- 4
- Pkg.:
- Boxed
$6.29 $4.08 -
NGK Spark Plugs 7112 Spark Plug 7112
NGK Spark Plugs
$5.89 $4.13NGK 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 performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-D8HA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7112
- Pack:
- 10
- Pkg.:
- Boxed
$5.89 $4.13 -
NGK Spark Plugs 7162 Spark Plug 7162
NGK Spark Plugs
$5.89 $4.13NGK 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 performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-DR8EA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7162
- Pack:
- 10
- Pkg.:
- Boxed
$5.89 $4.13 -
Sold Out, please call for ETA.
NGK Spark Plugs 7222 Spark Plug 7222
NGK Spark Plugs
$3.99 $0.00NGK Spark Plugs 7222 Spark Plug 7222Chosen 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-BPR4ES
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7222
- Pack:
- 4
- Pkg.:
- Boxed
$3.99 $0.00 -
NGK Spark Plugs 7331 Spark Plug 7331
NGK Spark Plugs
$5.49 $3.84NGK 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 performance and long life.•?Triple gasket sealing process...- Part Number:
- 41-BP6HS
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7331
- Pack:
- 4
- Pkg.:
- Boxed
$5.49 $3.84 -
NGK Spark Plugs 7411 Spark Plug 7411
NGK Spark Plugs
$14.79 $7.61NGK Spark Plugs 7411 Spark Plug 7411Chosen 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-CPR8E
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7411
- Pack:
- 10
- Pkg.:
- Boxed
$14.79 $7.61 -
NGK Spark Plugs 7421 Spark Plug 7421
NGK Spark Plugs
$5.59 $3.69NGK Spark Plugs 7421 Spark Plug 7421Chosen 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-BMR6A
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7421
- Pack:
- 10
- Pkg.:
- Boxed
$5.59 $3.69 -
NGK Spark Plugs 7502 Spark Plug 7502
NGK Spark Plugs
$19.79 $10.26NGK Spark Plugs 7502 Spark Plug 7502Chosen 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-CR9EH9
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7502
- Pack:
- 10
- Pkg.:
- Boxed
$19.79 $10.26 -
Sold Out, please call for ETA.
NGK Spark Plugs 7512 Spark Plug 7512
NGK Spark Plugs
$4.29 $0.00NGK Spark Plugs 7512 Spark Plug 7512Chosen 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-D6EA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7512
- Pack:
- 10
- Pkg.:
- Boxed
$4.29 $0.00 -
Sold Out, please call for ETA.
NGK Spark Plugs 7548 Spark Plug 7548
NGK Spark Plugs
$0.00NGK Spark Plugs 7548 Spark Plug 7548Chosen 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-BR9EYA
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7548
- Pack:
- 10
- Pkg.:
- Boxed
$0.00 -
Sold Out, please call for ETA.
NGK Spark Plugs 7599 Spark Plug #7599
NGK Spark Plugs
$8.39 $5.32NGK Spark Plugs 7599 Spark Plug #7599Chosen 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-CMR5H
- Availability:
- In Stock - Ships same or next business day.
- Model #:
- 7599
- Pack:
- 10
- Pkg.:
- Boxed
$8.39 $5.32
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.