QUOTE(pilothyer @ Apr 26 2019, 10:24 AM)
QUOTE(Ansbacher @ Apr 25 2019, 02:10 PM)
Every time I need to adjust the accelerator pumps on my Dellorto DRLA carbs, I can never remember which way to turn the nuts (clockwise or counter-clockwise) to increase the volume pumped and vice-versa. Can someone remind me? Thanks.
Ansbacher
If you are referring to the pump shaft nuts, they were never meant to be used to adjust the volume of fuel pumped. You can, however adjust the volume with either a heavier accelerator pump spring (to increase the volume) or larger pump jets or possibly larger idle jets (one size up)
To simply answer your question clockwise will yield a longer pump stroke and counter clockwise will yield a shorter one.
excellent answer,the Dellorto handbook should have quantity per/stroke which you set to.
I did my Zeniths after I rebuilt them,one was fine and the other was out a little, I found this was caused by wear on one link arm roller that runs on the throttle cam on the left carb.
With this repaired I didn't have to adjust the screws as it was close enough,I did notice some wear on both throttle cams so have a new set to fit some time.
Good luck.