I made my own tester today and hooked it directly to the pump. When I switch the key it quickly moves the gauge to 12psi and then drops to zero. I am assuming my issue is a screwed pump. I just want to make sure my assumption is correct before I order a new pump (Airtex 8335) on Amazon. BTW, is that part number correct for my 09 800? Machine has 3500km on it and hasn’t worked right since I got it 4 months ago. Previous owner changed plugs, wires, coil, etc and said he couldnt figure it out. When I bought it, it simply spit and sputtered on occasion and gradually developed a bog to the point where it now pretty much only bogs when throttle is applied. Should I just order the new pump?