Dielectric Grease, Ignition Connections
- Mike Hill
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- Feb 2
- 2 min read
Updated: 2 days ago
For high-performance Mercury, Yamaha, and OMC outboard engines, maintaining a strong and reliable ignition system is crucial. When replacing spark plug wires or ignition cables, applying a small amount of Super Lube Dielectric Grease with PTFE inside the rubber spark plug and coil boots is a simple but essential step.
This grease protects against moisture and corrosion, enhances long-term durability, and makes future maintenance easier—key factors in harsh marine environments.
What Does Dielectric Grease Do for Conductivity?
Dielectric grease is non-conductive, meaning it does not enhance electrical conductivity. Its value comes from preventing corrosion, oxidation, and water intrusion—issues that can degrade ignition performance over time.
When applied correctly inside the boot, the grease does not interfere with the electrical connection. The metal terminals still make direct contact through pressure, while the grease seals out moisture and contaminants, helping to prevent misfires and high resistance.
Why Use Dielectric Grease in Marine Applications?
High-performance outboard engines from Mercury, Yamaha, and OMC rely on precise ignition timing and strong spark delivery to maintain peak power. Super Lube Dielectric Grease with PTFE plays a key role in ensuring consistent performance in wet, salty, and high-heat marine conditions.
What is PTFE, and Why is it Important?
PTFE (Polytetrafluoroethylene) is a high-performance synthetic fluoropolymer that boosts the lubrication and protective qualities of dielectric grease. It provides:
Enhanced Lubrication – Eases spark plug boot installation and removal.
Superior Moisture Resistance – Shields against water and salt intrusion.
Longer-Lasting Protection – Resists drying out or washing away.
Non-Conductive & Chemically Stable – Maintains insulation and resists damage from fuel, oil, and heat.
How Much Should You Use?
Only a small amount is needed—too much can attract dirt and debris. A thin, even layer inside the rubber boot gives maximum protection without affecting performance.
How to Apply It Properly
Clean Terminals – Use a clean cloth or contact cleaner to remove dirt and oxidation from spark plug and coil contacts.
Apply Inside the Boot – Use a fingertip or cotton swab to spread a light film of grease inside the spark plug and coil boots.
Install Wires Securely – Push boots firmly until fully seated for a watertight seal.
Final Check – Ensure all boots are snug to prevent misfires and water intrusion.
For Mercury, Yamaha, and OMC outboards, proper ignition maintenance is essential for peak performance and reliability. Super Lube Dielectric Grease with PTFE, applied inside the boots (not on the metal terminals), helps protect electrical connections, prevent corrosion, and maintain strong spark delivery—keeping your engine running at its best on the water.
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