info any one ? coventry climax 6kv genset

[Timmy]

Hi guys im faily new to this but hoping some one can help me out.
i have a 6kva 240v g e c generator powered by a air cooled coventy climax engine, good new is its a runner and charging ok but i would like to tune the engine up and service the oil ect, has any one got any service info on it oil grade points gap plug gap ect, infact any info at all would be very helpfull, looking at all older posts i did see a old thred about this stlye gen set but nothink on oil grades ect, thanks guys Tim.