Finally reporting back.....
Have not had a chance to report back, too many other non-related other priority issues geting in the way of boating.... Work & Family obligations !
Anyway, got the new 'electric' fuel pump installed. Was actally and easy replacement for a DIY

Ran engine in yard on motor muffs for about 15 min w/o any issues. But then again, it ran fine on 'muff's', with old fuel pump.
Took the boat to a small lake nearby with my grandson for first test run after new fuel pump installation. Got a late start on water about 3:00pm, and weather was a lot cooler here in Central Mass on Sun about 70 deg, with a light wind. Certainly not like the warm and toastie Sat 82+
We ran the boat around the lake for a while, w/o any hesitation, coughing or stalling. I was just waiting for symptoms to appear

, but nothing seemed to happen?

Got boat up on plane from a stopped position several times, w/o any problems. Really put it under a 'load', seemed to run fine... WIth old pupm, I defintely would have noticed symptoms immediately under this test.
Only ran boat for about 30 min, stopped, dropped the anchor, had lunch, went for a swim (the water was still very warm), then headed back to boat ramp. By that time it was already 5:30pm, getting a lot cooler, and sun was
starting to drop.
Again, no problems ! I can't say 100% that probem has been solved, because I really didn't have a chance to run the engine on the water as long as I wanted to, wish I could have tested for an hour or so..... Everythingl considered though, all seemed fine. This being said, all things definitley point to a bad 'electric fuel pump' ! Unfortauanltely, spent a ot of $$$ in between, partly as a result of 2 bonehead marine techs ! Lessons learned, do my own research and analysis first !
I may take boat out again before winterizing for season ? Depends on schedule and available time... TBD?
FYI, even though boat seem to be working now, I am planning to move up to a larger, newer boat (2004-2008), next season if budget allows.
Thanks everyone for all you help, information and encouragement, much appreciated !
Bigdog