Ant idea what is the correct spark plug for the 170 Minarelli engine,, thanks for any help rec`....
According to my Champion plug book they list Minarelli engine Cottons as L81 (in NGK book this is B7HS)
As an alternative they also list Champion L6G (NGK B7HVX/B7HV) I'm not sure if this alternative is a hotter or colder plug as it's unclear in the book.
The plug gap is 0,5mm
Hope this is of use. Chris
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