That picture shows the correct screw for increasing the full load fuel delivery. That screw is the same for the 616/617 and the 601/02/03 pumps.
If you want to change fueling on a turbo then that's a different story.
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Alex.
MB Tech
Sydney, Australia
Volvo 122S
W201 190D 2.5 manual
W202 C240
W203 C32
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