Home-made spark arrester for genny?

[Iceni John]

My generator (a small portable unit which is only for occasional emergency use and for the construction phase of my bus's conversion) had a small spark arrestor with it.   It is a small condom-shaped wire-mesh thingamajig that sits inside the muffler's outlet.   Who knows if it would do any good?   It is described as meeting U.S. Forest Service requirements (whatever they may be).   If it were an Extreme Fire Danger day, I simply wouldn't use my generator at all, just to be safe.

John

[Lin]

Forgive me if I was mistaken, but I thought it was a contractor style generator, one that is designed to sit on the ground.  I believe that RV style generators, those designed to be enclosed, have different specs.