BF25 losing pwr when under a load
 

My BF25 has been in and out of the Honda Repair Shop four times in the last two months. They are now guessing as to why it losses power while running perfect for say 30 mins @ 100% throttle, then out of the blue it loses power and hunts as if its starving for fuel. The problem gets even worse if it experiences more load demand (while motoring up and over ocean swells)
1) Not overheating (new impeller)
2) Rebuilt the carburetors.
3) Fresh fuel
4) Swapped fuel tanks and hoses.
5) New thermostat.
6) New spark plugs
7) Complete scheduled service.

The Honda IT repair guy wants to replace the CDI Box now...ouch$$$
I could sure use some help with this one...salmon season is passing me by
Thanks Guys,
Mike