have 92 Johnson GT200, Fished for 2 days, 1st day motor ran good but the tack needle would make a sweep across the gauge at times. 2nd day was running W/O the tack needle started sweeping the gauge and lost power. turned motor off and restarted, the motor had a miss. while powering up you could feel the motor pick up and drop the cylinders. checked after getting home and found that the bottom 2 cylinders on right side have no spark. I changed the ing coils on the 2 dead cylinders with 2 good one, same problem. I was thinking that the tack signal comes from the power pack and since it was acting funny first the problem may be the power pack. Before I replace the power pack anyone with input on the problem?