V6 Excel - no spark cyls 1,3,5

[Bevo]

All three cylinders on the 1,3,5 Bank have no spark. What is the common culprit that could cause this problem? The other bank 2,4,6 sparks fine. Grounds have tested OK. Engine was running last week.

[boats.net]

Need to check peak output voltage of low speed charge coils and CDI output voltage, should have 75 volts at cranking between brown and red charge coil leads and 58 volts between black/white and ground wires at ign. coils. Check all grounds carefully, grounds are the most common problem with that engine.

[nickof time]

I had similar problem and it was isolated down to the pulsar coils. Except my problem was only on 1 and 5. Using the manual, check resistance on the coils (pulsar) that fire those cylinders.