Engine backfires at low RPM

[nonanajo]

"Good day. I have a Volvo Pent

"Good day. I have a Volvo Penta AQ131. Engine starts fine but when I give it gas slowly it backfires and shuts off. If i give it gas fast, RPMs increase without an issue. All help is appreciated. Thanks."

 

[el_pescador]

Looks like the accelerator pum

Looks like the accelerator pump stroke may need adjustment.