NGK Spark Plug IZFR5G - Mercury Mariner DFI - Optimax - Quicksilver 33-889597001

Genuine NGK / Quicksilver IZFR5G Spark Plug

Fits various outboard models including 150, 200 & 225 Optimax

Genuine OEM Quicksilver / NGK Part

The listing is for one spark plugs
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.