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How big is your flame arrestor?

fast94persuader

fast94persuader

Well-known member
How big of a flame arrestor do I need?
Mine is smaller than ten inch and probably only 2 inches tall and that seems short.
Also mine does not have any place to vent out of the valve covers so they just have filters on them.
Has anyone drilled a hole and made their own tube to vent from the valve covers?
If you guys think mine seems small I might just but a new one.
Where is a good place to order one from?
Thanks
 
The bigger the better more surface area the better they flow, stay away from the k+n everyone I have talked to says they flow like crap because of the unnecessary filter element
As far as the valve cover vents go if you already have breathers and they are working why bother changing them but if you really have too I've seen a bracket on a lot of the black motors that hangs over the flame arrestor
 
what are you putting it on?? how much does it need to flow??

as jazzy said, the bigger the better, Be sure you have the clearance!!

as far as the vents, they are designed to catch the "flamable" oil vapors out of the crankcase, and i believe (dont quote me) that they are a USCG requirement.. but lots of people just got breathers pushed in.

BUSS
 
The breathers are not working that great. They clog up pretty quick and i beleive that they are the reason the my oil pan gasket pushed out last year and caused all kinds of trouble. Thats why I wanted to try to vent it to the air cleaner. The motor is a 540 with around 700 horse and i run it to 6000 rpm.
 
Thanks.
I'm gonna measure mine and see exactly what size it is before I decide what to do. I'm pretty sure that I can make a tab to attach to the one that I have now if the measurements are similar to a new one. For some reason I thought that the tubes actually went through the screens, but all of them that I am finding just have them come right up to the screen. In that case I might be able to make something to attach a hose and use the arrestor that I have.
 
Thanks Mr. Buss I am going to price a few of those out.
Currently I am running the K&N breather mesh filters. Like people have said about their flame arrestors, do they have an unnecessary amount of mesh/filter material in them that makes them clog? Would it be a good idea to try to switch to normal, push-in, type filters? It looks like I should probably look into one of these seperators, but I was just wondering anyone's opinion on those K&N breathers.
 
OK last question I promise.
If I install one of these, and I plumb one line to the catch can, what do I do with the other side?
Plumb it to a breater?
Or would it be a good idea to plumb the other side to the air cleaner?
 
I would plumb it to the air filter. The air rushing into thee carbon will pull the oily mess into the carbon and the motor will return it rather than have it all over your motor. As some others have said it is supposed to be plumbed to the filter to be up to CG regulations. I wonder if an insurance company could use the incorrectly connected breathers to get out of a claim if the boat burned.
 
atc250r said:
I would plumb it to the air filter. The air rushing into thee carbon will pull the oily mess into the carbon and the motor will return it rather than have it all over your motor. As some others have said it is supposed to be plumbed to the filter to be up to CG regulations. I wonder if an insurance company could use the incorrectly connected breathers to get out of a claim if the boat burned.
Click to expand...
Seriously? "How big is your Flame Arrestor?"
"I gotcher Flame Arrestor right here".!:rof:

Liquor up front. Poker in the rear.
 
they seem to work better running a reg PCV valve plumbed to the carb...the 500HP from mercs did it thru the intake, but done several right off the carb and work very well...
 
sim said:
Seriously? "How big is your Flame Arrestor?"
"I gotcher Flame Arrestor right here".!:rof:

Liquor up front. Poker in the rear.
Click to expand...

:offtopic:
Ha! couldn't resist, could you, I wondered if anyone would jump on this. My self restraint was only slightly better then yours. :poke: Shame, shame on you, sim:poke:
 
karzrus said:
:offtopic:
Ha! couldn't resist, could you, wondered if anyone would jump on this. My self restraint was only slightly better then yours. :poke: Shame, shame on you, sim:poke:
Click to expand...
Don't even say it. I am so embarrassed. I can barely even look at myself this morning. :shakehead:
 
ezstriper said:
they seem to work better running a reg PCV valve plumbed to the carb...the 500HP from mercs did it thru the intake, but done several right off the carb and work very well...
Click to expand...

That is how I set mine up. Works great for me. Been running that set up for years.
 
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