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Collection, Preservation and Display of Old Lawn Mowers

Hayter Ambassador spark plug

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Hi all Just acquired an old hayter ambassador for restoration. It's got a ND W20-U Spark plug. Can anyone give me the NGK or Champion equivalent please?

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hortimech Fri, 24/01/2020

The Hayter Ambassador used various engines over the years, so this will depend on what engine is fitted, if you are unsure what engine is fitted, a photo will help.