RE: Non-OS engines
Oldtyme
In all fairness since tuning by the bench commitee seldom acheves much joy and just two runs on a brand new engine, One just has to ask the Obvious question and that simply is did any single one of those six realize that this was an AX engine? And that all AX's except the old .46AX utilise a completely different carburation system. This with the mid range or low range needle whatever you care to call it in a completely different location on the left side of the engine in the end of the fuel inlet cone.
I have seen bench commitees experts repetedly stick a screw driver in the end of the throttle
barrel thanking they had actually adjusted the mid/low range while in fact accompishing nothing.
John