Yeah the manuals may be wrong for your Line Trimmer 354 ,the first few hundred have the needle float carby then they changed to the diaphragm carby but most likely the manuals just list the diaphragm carby.
I saw a early manual and it said revised 1983.
Victa did a similar thing , the early Rotomo 501 to 1246 used a Villiers carby but I've never seen a Victa Rotomo manual that shows adjustments and servicing for the Villiers carby.
