If you are looking for a new Beckett 51771GU Oil Burner Ignition Transformer you might be interested to know that it weighs less and is smaller then the standard iron core Beckett transformers This type of oil burner ignition has a peak voltage output that doubles the standard Beckett iron core transformers.The Beckett 51771GU Oil Burner Ignition Transformer works in cold oil or delayed spark conditions.The Beckett 51771GU Oil Burner Ignition Transformer will work on 120 Volts @ 60Hz. The measurements are 4 inches in width and the Depth is 5 27/32 inches.

Beckett 51771GU Oil Burner Ignition Transformer
If you want to check the ignition transformer to see if it works properly, go ahead and loosen the two holding-down screws and flip the little tabs back. Once you push the reset button, you will just have to wait for the motor to start. Give it a few seconds until it fully starts. When the motor finally starts off, then pull up on the transformer a little bit and listen carefully for the spark to jump to the electrodes. Be careful that this spark is usually very hot and will jump a gap of about a quarter inches. At this point, you need to make sure that you see a bright blue/white hot spark, instead of yellow or orange color spark. Then it is a sign that you might need to replace the transformer.