I'm getting conflicting opinions from various fire authorities as to how much carbon collected in the carbon trap of a GP-9 (567 prime mover) is "bad." I've got one inspector that tells me that anything more than about a teaspoon of carbon particles in the bottom pipe cap is bad. Yet a Forest Service publication says that if the pipe cap is full, that is ok, but a pint or more is bad.

Can anyone reference a technical publication of these carbon traps? I'd especially like to see a diagram of what the inside arrangement is. And any discussion as to how the thing is supposed to work, and if its efficiency drops as the collecting area fills.

Thanks.

Hi.

The Calif. has a strict on the Spark Trap for internal combustion engine. But don't say the amount it the Spark Trap just the size of that exit the exhaust.

http://www.fire.ca.gov/fire_prevention/fire_prevention_wildland_terminology.php?filter=S

Stan Paulsen