[transmitterdan]

This is good advice. I bought a twin engine gas/petrol fueled boat once with electronic ignition. Previous owner was frustrated because engines ran rough and died a lot at idle. So I closed myself in the engine room with the lights out. When running there were hundreds of blue sparks coming from the distributor and wires. Replaced all that and used higher grade wires. Boat changed its personality and ran perfectly for years after that.