Surface gap plugs are nearly immune to pre-ignition, and usually require a special high energy ignition system. They can be susceptible to fouling, especially in colder applications, but may be necessary in high compression applications. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer. Copper core aids in heat removal. Triple seals prevent leakage.
Spark Plugs
NGK Surface Gap Spark Plug BU8H (6431)
SKU: GB-BU8H
$10.85
Key benefits
- VERIFY FITMENT
- SPECIFICATIONS
- Shell
- Thread Diameter 14mm
- Thread Pitch 1.25mm
- Seat Type Gasket
- Reach 12.7mm (1/2")
- Hex Size 13/16" (21mm)
- Terminal Type Solid
- Overall Height ISO
- Gap .016" (0.4mm)
- FITMENT
- Mercury Mariner Spark plug 105 to 300 HP
- 105 HP 95-98, 135 HP 86-99, 140 HP 95-99, 150 HP 91-99, 150 HP (150) 79-94, 150 HP (1500) 78,
- 150 HP EFI 98-99, 150 HP marathon 85-88, 150 HP xr-2 85-87, 150 HP xr-4 88-91, 150 HP xr-6 92-97,
- 150 HP xri 93-97, 175 HP 79-98, 175 HP EFI 98 -99, 175 hp xri 91-97, 200 hp 79-99, 200 hp EFI 98-99,
- 245 hp 2.5l 95-96, 250 hp 3.4l 89-90, 260 hp 2.5l offshore 95-97, 265 hp 2.5l ss drag efi 97, 275 hp 89-94,
- 300 hp 81-83, 300 hp 2.5l s3000 efi 97, 300 hp 3.0l 01, 300 hp 3.4l 84-98, 225 hp 80-81
- Mercury OEM: 136862, 8M0176682
Warranty
12 months warranty
Shipping
Ships Australia-wide