Yes certain things do effect aluminium in different ways as i found out from using sugarfoot`s method, which did clean all the gunge and gunk off, but now i have a matt black engine, which i think looks better than the silver colour most engines are! (thanx sugarfoot and everybody else for the suggestions)
That seems to be that problem sorted, now i need to find out what plug i need for an inverted mounted engine plus what size triple blade to use ??
Rick[sm=confused.gif]