•  Free shipping on UK orders over £60 (£4.95 for UK orders under £60)
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NGK Spark Plug BU8H Mercury - Mariner - V6 2 Stroke - hot plug

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Delivery Information

Currently we only deliver to the UK, Republic of Ireland, Germany, France and Spain, Netherlands, Belgium and Denmark for online ordering - please contact us on sales@bottomlinemarine.com if you live elsewhere.

Free shipping on UK orders over £60 (£4.95 for UK orders under £60)
Excludes certain heavy items
All prices include UK VAT - No customs or duty fees for UK orders


Genuine NGKBU8H Spark Plug
NGK BU8H Spark Plug to fit various outboard models
As these areslightly hotter than the BUHW often specified by Mercury/Mariner for older V6 2 strokes the have a lesser tendency to foul at lower RPM's.
If you don't know how to read plugs to see if yourplug is running to hot or cold it's best to stay with the standard plug.
Surface gapSpark Plug: 14mm Thread, 12.7mm (1/2") Reach, 13/16"
(20.6mm) Hex Size, Gasket Seat, Non-Resistor, Solid Terminal, Surface Discharge, Tungsten Electrode

The item price is per spark plug
NGK Spark Plugs provide the ultimate performance for your engine. They're high quality, reliable and their advanced materials and design provide superior anti-fouling characteristics, which reduce carbon build up over a wide heat range. "V" Type plugs include a thin centre electrode tip, which is made of precious metal for added corrosion and oxidation resistance. The result: fast, sure starts and less misfiring, even in the coldest weather.
Ribbed to eliminate flash-over and improve performance.
Highest quality ceramic insulators improve heat dissipation and electrical insulation to provide long term durability.
More gaskets for peak performance.
Deep-seated copper core provides maximum engine efficiency at high and low speeds.
Projected insulator precision-engineered to prevent fouling and misfiring.
Nickel alloy tip prevents fouling, maximises performance and extends plug life.

Specification List

Type Spark plug EAN 087295064313