Sorry if Iím not in the appropriate area for posting this. First time.

I have a 99 santera that will idle but when give it throttle it dies or just sputters. Took to a mechanic 9 months ago and he replaced computer and wiring harness as he said they tested bad.

Ran a pressure test on fuel he said running 35 lbs which from his knowledge is the correct pressure.

Fast forward to yesterday he calls says come get the boat as he canít figure it out. It will start and idle but will once you give it throttle it will either die or just sputter.

Any ideas?