Tom, I have a 751 with the Peugeot engine, so my observations on my block heater are of no use to you. But, the glow plug/ ignition key: My key does activate the glow plugs when turned to the right. A yellow light lights up for several seconds while power is applied to the glow plugs. When the light goes out, the plugs are hot and it's ready to crank. I note that the plugs are still powered up for perhaps 10 seconds after the light goes out, to presumably let the cylinders come up to some minimal temperature before the glow plugs go out. Turning my key to the left releases the hydraulic pressure to the aux connectors on the lift arms. The book says to run the engine at some nominal speed, then turn the key quickly to left and hold it until the engine comes to a stop. Works fine on mine. I leave the caution here, to not be too close to whatever is hooked up to the aux lines, as it's behavior is unpredictable when the engine is spinning down. I almost got catapulted into the air, as I was standing on my bucket when I turned the key off, and my grapple opened up wide open. That woulda been a hoot if I were standing on the grapple.... ---Bob