ORIGINAL: dick Hanson
possible -but probable?
the carb is designed for a basic swept displacement crankcase --as such -if it is reasonably well matched --the RELATIVE fuel air ratio should work throughout entire power band
In this case - I would have slightly closed choke plate to see if the mix goes rich- it should .
I don't know if there is a particular restrictive setup in the high speed discharge port - simply becuse I have never seen a problem with flow.
If someone knows a big deeply held secret aboout how this particular model carb runs lean at high speed -or was calibrated to run lean (restricted flow thru main)- speak up . I would like to know .
I guess the ones I have were sneakily modified by ZDZ?
I don't think so --
Dick---There is a thread on this very subject that is several pages long---Of the four DA50's that I've been associated with (two are mine and the other two belong to a buddy)--I could back the high end screw out completely and the engines would never go overly rich---They would only drop a couple of hundred RPM. I wonder if the reeds are too stiff, not allowing enough fuel in at high speed???
Kevin