Hoping someone can help me identify the p/n for the magneto (ignition coil) on a 12 HP B&S vertical shaft engine. Model 281707, Type 0415 01, code 89120431. It's on an old 38-inch Murray mower that's been sitting outside and rodents chewed off the spark plug wire. I'm wanting to check the engine to see if it's good for use on another mower but can't find a coil number online. If NLA is there another coil that could be substituted?