After all these years I know how hard it is to get proper and accurate technical info for the AW11 and its 4A-GE 16V Engine.
So,.this is my gift to you all fellow AW11 enthusiast
I do not remember were I fount it but I wish I fount it years earlier.
2200 pages original service and maintenance manual for all AW11 models made in '88 and '89 incl the AW11 Turbo [4A-GZE]
Off curse its also handy fore the previous models !
All you need is Adobe reader.
here is the link,.
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Ride on !!