Steve and John I did get your injectors in the mail. I will flow test them and record all the results then clean very thoroughly, then back to flow testing plus recording those results. I will report my findings. Hopefully this is your underlying running issue that I can straighten out for your engine since the last marine repair shop in your area seemed not to follow through 100% for the complete fix.

Also do you have any diagnostic scan results / reports that I can go over as well. I should ask did anyone scan this app to even begin with ? Thank you for your business.

Revd up , I'm doing the same thing on a 540 build , have a flashed mefi 502 ecm and 3 sets of higher flow injectors and 3 different map sensors even have a peanut port intake for the Cutler system .think the orig used a accel fmu that was loaded with a floppy disc .have a stock ,and modded mpi intake for some back to back testing,if I can ever scrounge up the time and money to get back.on that one . The modded 502 mpi intake supports 650 ish in a na 540 with aftermarket heads and injectors so I expect a little more with the cutler and its dart style intake