Description
NGK ITR4A15 Iridium spark plug delivers superior ignition, fuel efficiency, and durability - enginee View full description.
Total Price:
Add to CartNGK Laser Iridium spark plugs offer the best combination of performance and longevity. The iridium tipped center electrode provides durability six times harder than platinum. NGK's high-grade pure alumina ceramic and 98% pure copper core prevents the spark plug from overheating while providing reliable starts.
Laser iridium plugs are tested to the highest standards to ensure quality and durability. Actual OE or equivalent replacement spark plug.
Replaces Mercury 33-8M2018369, 33-884019001, 338M0204739
What is the NGK ITR4A15 Spark Plug used for?
The NGK ITR4A15 Spark Plug is an OE or equivalent replacement spark plug featuring a laser iridium center electrode tip. It is designed to provide durability and reliable starting performance, with an iridium-tipped center electrode and NGK high-grade pure alumina ceramic construction.
What type of electrode does the NGK ITR4A15 Spark Plug have?
The NGK ITR4A15 uses an iridium center electrode tip with a copper center electrode core. Its ground electrode has a standard configuration and uses nickel as the ground electrode core material.
What are the specifications of the NGK ITR4A15 Spark Plug?
The NGK ITR4A15 has a resistance of 5000 Ohms, a standard ground configuration, a nickel ground electrode core, a copper center electrode core, and an iridium center electrode tip. Its NGK stock number is 5599, and its part number is ITR4A15.
What are the benefits of the iridium center electrode on the NGK ITR4A15?
The iridium-tipped center electrode is designed for durability, with NGK stating that iridium is six times harder than platinum. The Laser Iridium design is also tested to high standards for quality and durability.
Which Mercury spark plugs does the NGK ITR4A15 replace?
The NGK ITR4A15 Spark Plug replaces Mercury part numbers 33-8M2018369, 33-884019001, and 338M0204739. These replacement numbers can be used to help verify that the ITR4A15 matches the spark plug specified for your application.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Quicksilver Spark Plug NGK ITR4A15 8M0204739 Quicksilver 8M0204739 NGK ITR4A-15 Laser Iridium Spark Plug is a premium replacement spark plug designed for select MerCruiser 4.3L, 5.0L, 5.7L, and 6.2L...
NGK BR6ES Spark Plug NGK Standard Spark Plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation...
NGK BR8HS Spark Plug NGK Standard Spark Plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation...
NGK BR6FS Spark Plug The NGK BR6FS Spark Plug is a standard NGK plug. NGK Standard plugs are an OE cornerstone that have provided decades of reliable performance. The solid copper core offers...
