I bought an older 28" cut Snapper RER with a Tecumseh engine on it. I have to do some carb work as it lets gas run right through to the engine, getting a kit for it. But I noticed that one of the wires coming from the engine , under the carb is burned, broken do not know. I cannot find a matching wire end anywhere on the mower. A wiring diagram if anyone has one would be great.