Best Boat Engine Spark Plugs in 2026

Made by AC Delco with nickel alloy tip, copper core and ribbed suppressor seal for durability and performance

Check your engine owner’s manual for the correct spark plug and use only the plug as recommended by your engine’s original equipment manufacturer

Nickel-chrome alloy sheathing on the ground and center electrodes help resist wear from spark erosion and the corrosive environment of the combustion chamber

Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity.

Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer

NGK is the world's largest supplier of OEM spark plugs

Designed to operate over a much wider heat range than ordinary plugs

Resists carbon buildup and pre-ignition

High alumina ceramics for better heat transfer and electrical insulation

NGK BU8H surface gap plugs feature a semi-surface discharge design to improve ignition and burn off any carbon before it can build up to foul the plug

Check your engine owner’s manual for the correct spark plug and use only the plug as recommended by your engine’s original equipment manufacturer

NGK Trivalent metal plating also provides superior anti-corrosion in the marine environment and anti-seizing for easier removal

Sold in packs of 4

Dependable and durable

Patented SAC-9 semi-conductor resistor for maximum EMI & RFI suppression

Copper core center electrode allows for accurate control of heat range for longer life

This 4 pack Champion Copper Plus 980 Spark Plug replaces Champion Spark Plug XC92YC, parts and is perfect for replacement or a performance upgrade.

IMPROVE PERFORMANCE: The tried-and-true Champion Copper Plus SME Spark Plug boosts performance so that your engine runs at its best. For projects large and small, the Champion Copper Plus SME spark plugs are the right plugs for the job. They help power millions of small engines, including mowers, tractors, and similar small engine machines

CHOOSE CONSISTENT COMBUSTION: The Champion Copper Plus SME Spark Plug employs a copper-core center electrode and patented SAC-9 semiconductor resistor to produce complete and efficient combustion over the life of the spark plug. The Ultraseal-coated shell reliably withstands soot and offers superior etching tolerance, ensuring long-lasting sparking capabilities and dependable performance and durability

Fit Type: Universal Fit

The Patented Diamondfire Ground Electrode Is Secured To The Shell With Two Legs To Help Facilitate Heat Transfer, And To Withstand The Intense Vibration Of Powersport Engine Applications

Improved Starts: Patented Edge-To-Edge Design Concentrates Spark Energy, Which Results In Quick And Easy Starts In Any Conditions

Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity.

Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer

NGK is the world's largest supplier of OEM spark plugs

Consult owners manual for proper part number identification and proper installation

Genuine Champion Spark Plugs

Please refer to list for compatibility

【High quality from high quality material】:Purified alumina powder insulator from Germany ALMATIS(Model:HVA FG Q06) and Full-automatic isopressing;Iron shell(Model:20# 08 AL) and automatic welding/rolling bending;Central electrode Iridium alloy and 360 degree laser welding

【Reduce the risk】:HiVehicle Updated design reduce the risk of breaking off during working

【Increases Fuel Efficiency】: G-Power Iridium Alloy Spark Plugs offer superior performance with improved fuel efficiency, HiVehicle lower emissions, and quicker starts

Replaces OEM: Columbia 32301-78C E-Z-GO 16430-G2 John Deere ET12355 Kawasaki 92070-2052, BP4HS NGK 3611, BP4HS Subaru 065-01401-90 Yamaha 94701-00159

Standard plug type

10mm Thread, ½” Reach, Gasket Seat

Quicker Starts; Saves fuel

More Power. Thread Reach: 0.500"

OEM Made in Japan by Genuine Factory that supplied to Yamaha

For Yamaha Outboard part number: 94701-00217, 94702-00217, 94703-00217

Details about NGK b7hs-10: Thread diameter: 14mm, Thread reach: 12.7mm, Seat type: flat, Hex size: 21mm

NGK Spart Plug For Suzuki Outboard 4-Stroke

Double Platinum Power - Premium Spark Plug. More Powerful Performance.

Platinum center and ground electrode to inhibit wear

Maintains stable operating temperature under all engine loads

Fabric: Made From Polyester, Which Is Lightweight And Breathable

Design Style: Women's Rompers Is Slim, Casual, Sexy, Sleeveless And Made From Polyester Suitable For Summer, Daily, Party, Beach, Vacation And Travel With Solid Color, Splicing, Wide Leg And Chic And Stylish Design Comes With Watermelon Red, Black And Yellow, Which Is Fashion And Trendy

: Women's Rompers Which Is Made From Polyester, Comes With Watermelon Red, Black And Yellow, Which Is Fashion And Trendy, Perfect For Matching With Your Favorite Shorts, Leggings And Jeans

Material: 95% Polyester 5% Elastane

2. V-neck Design Makes You More Attractive.

3.Perfect With Your Favorite Shorts,leggings, Black Slacks, Denim Jeans, Etc