I just wanted to let everyone know that I came across a website that I found pretty helpful.
It is the homepage for BOSCH sparkplugs. They have an icon there called "technical info." If you click on it there are illustrations of different spark plugs and what they look like if your engines to lean, rich etc. and there are diagrams of how plugs are sized and also a part that tells how you can diagnose starting and charging problems.
Im not sure if we can post links here, so just type Bosch sparkplugs into a search engine and it should take you right to it.
cool site
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