This device is designed to stop the flames that could potentially result from an engine backfire from coming into contact with fuel and starting a fire. A monthly inspection of your backfire arrestor should be performed to ensure that it remains damage-free and that it is still tightly fastened to the carburetor.
What is the purpose of backfire?
The term derives from parallel experiences with early unreliable firearms or ammunition in which the explosive force was directed out at the breech instead of the muzzle. That is the origin of the use of “backfire” to indicate producing an unintended, unexpected, and undesired result.
Which is an acceptable means of backfire flame control?
(b) The following are acceptable means of backfire flame control for gasoline engines: (1) A backfire flame arrestor complying with SAE J-1928 or UL 1111 and marked accordingly. The flame arrestor shall be suitably secured to the air intake with a flame tight connection.