INFORMATIVE LINKS TO FREQUENTLY ASKED QUESTIONS
AND TIPS REGARDING AVIATION SPARK PLUGS
Sacramento Sky Ranch FAQs
This is a great site for general aviation aircraft pilot, mechanic and owner. Some topics covered are:
Connecting the spark plug to the connector
Torque value for spark plugs
How do I rotate the spark plugs
Difference between the Unison and Autolite spark plug
What happened to the Auburn spark plug
How do I prevent spark plug lead fouling
Difference between short reach and long reach
Difference between 3/4 "all weather" and 5/8 spark plugs
Does the spark plug gasket come with a new plug
Heat rating of spark plugs
What anti-seize should I use when installing the spark plug
Spark plug electrode gap setting?
The Ultralight Place
Mainly focused on Rotax Engines as applied to Ultralights. Has a good page on plug condition by color that applies to all engines.
Reading Plugs by Color
AAS-Aerotechnik
An Austrian FBO, dealer and repair station with lots a capability and maintenance expertise for fixed wing and rotory wing, piston and turbine engines. They have two pages on Spark Plugs and Smooth Engine Operation from OEM service manuals.
Key to Smooth Engine Operation I: Hot and Cold Plugs?
Key to Smooth Engine Operation II: Appearance & Color of Plugs.
