This flame arrestor is a replacement for original Mercury Marine 85784A1 and 805016A1 flame arrestors.
Fits 4 and 6 cylinder engines with 2-barrel carburetors
• Overall height: 2.156"
• Element height: 1.088"
• Throat diameter: 3.120"
• Overall diameter: 6.50"
• 1 PCV vent tube nipple fits 5/8" hose
• Anodized aluminum for years of trouble-free service
Heavy on the technical side...
A Flame Arrestor is a device which allows gases to pass through it, but stops the passage of a flame - in order to prevent a fire or explosion.
On carburated marine engines, flame arrestors ensure that an engine backfire does not cause the explosion of any gasoline vapors which may exist nearby, or within the engine compartment.
Typically made of thin metal tubes, gauze, or screening, flame arrestors work by rapidly conducting heat away from any flames that attempt to pass through them - cooling the flame to the point where it is extinguished.