Fuel injecter broken

Hi, I have a 150Hp 2 strokes (HPDI, extra-long, 2004) that broke down, and according to my mechanic its the fuel injector electronics that burn down in 4 of the 6 cilynders (photo of the parts can be seen in this link yamaha pictures by jonifili - Photobucket).

I looking for someone with a similar problem in order to understand how this may happened, in one hand, and what was there option (repair, new engines, other).

The part has the number E7T25071 printed in the plastics. Is this the part number?

Best,
JF

[boats.net]

All the injectors I have had to replace has been from clogged filter inside injector due to bad gas, debris or trash in gas.