Spark plugs for Dart 308s

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03-24-2016, 09:12 PM

#11

Black Baja

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Quote:

Originally Posted by Mr Maine

Which one of the 2 autolites? It looks like one of them crossreferences to a r41t, which is a colder plug than a mr43t right?

What makes them better in your opinion?

The Autolite plugs are a lot beefier than the other plugs. They have a much better ground strap on them. If I'm trying to tune a motor by reading plugs I run NGK's they are by far the easiest to read (Autolites can be a little tricky) once I'm happy (for the most part) I'll put the Autolites in do a couple more reads to make sure it's safe and run the Autolites from there on.

03-24-2016, 10:42 PM

#12

mike tkach

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like joe said they use a .750 reach plug with the gasket.you can,t go wrong with ngk plugs as long as the heat range is correct.imo a 8 range in ngk works well in most marine applications.