1996 Jonhson 200HP spark on two cylinders only

[jiffyboat]

this motor have only two cylinder with spark.. the two on the center of each bank .. battery is full charged, and the motor turn fast.. I did disconnect the two rectifier wires , and still nothing .. compression is good ,I just got this boat and was seating for more than 5 years.. initially it was firing all the starboard bank and only the middle one on the port side bank.. but now only the two on the middle of the heads

 

[Faztbullet]

Remove all plugs and retest..if it has spark on all the starter/battery/cables have problems.....

 

[jiffyboat]

is exactly the problem that was found , the boat had a small battery 450cca , and I installed a big one 840CCA , and that motor now spins very fast., there is spark in every cylinder now.. thanks for the help