Add Yahoo as a preferred source to see more of our stories on Google. When an air-fuel charge burns inside an engine's cylinder, some of the heat that is produced gets absorbed by the spark plug. The ...

The spark plug in your car and a spark plug on a boat have the same job, but perform it in very different environments.

Considering the price differences between different spark plug types, you may be tempted to switch from platinum to copper plugs. Here's why that's a bad idea.