I have a 1988 15HP Mariner outboard (OC115390) that gets spark to one plug but not the other. There is a green/yellow wire that goes from the switch box to one coil and a green/white wire that goes from the switch box to the other coil. If I connect the green/yellow wire to each coil (one at a time)the plug sparks. The green/white wire hooked to the coils causes no spark. Assumption: coils are good. Question: How do I check the switch box, stator and trigger? Is this - one spark only - a common problem? <br />Any information would be helpful.<br />-Harry<br />hjsabourin@cmsenergy.com 