baja sc50 no spark Mar 10, 2009Hi to all. I have a baja sc50 eng. Qj139Qmb it has no spark. I have determined it has a harness problem. I have never heard the engine run. Does anyone have wiring diagram to wire just the engine to run. Out of eng. triple plug white, green/red, blue/white and one baja sc50 in Parts & Accessories | eBay Find baja sc50 from a vast selection of Parts & Accessories. Get great deals on eBay! Skip to main content. eBay Logo: KEY SWITCH ASSEMBLY FOR BAJA SUN CITY 50 SC50 SC50P 4 WIRE 4 PIN IGNITION MODULE. Brand New. $29. FAST 'N FREE.