4 strokes need special plugs.
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Caroline Goldsmith with a Saito FA-65 powered Astro Hog |
Peter Goldsmith and his wife fly an Astro Hog with a Saito .65 up front. Pete says "Yes, I agree, 4-strokes do need special plugs. Truth is, all glow engines need special plugs depending on the environment they are used in. As for cost, well, 4-stroke plugs are about the same as 2-stroke plugs, and from my experience a 4-stroke plug outlasts a 2-stroke plug by quite some time."