Have Boat Questions? Ask a Boat Repair Expert.
Hello my name is ***** ***** I will assist you. Most probably the problem you have is a defective switch box. check the spark on the spark plugs, if on one side there is no spark, then surely that is the problem. Try swapping the switch boxes and the problem should move to the other side. If yes then you would need to replace the defective switch box.
If you require further assistance let me know.