Expert Glow Driver
 

I have an Expert Glow Driver thats giving me fits. I have recently installed a 2700mah battery to power the driver which is attached to a 4 stroke OS 300 twin Gemini engine. I can only get one glow plug at a time to light. Sometimes the driver will start the engine, but after a few flights it will only light one cyclinder and I am stuck because the whole engine is inside the cowl. Other than discarding the unit can someone give me a solution to this problem? Thanks, Aframe2