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  1. #1
    Join Date
    May 2009
    Posts
    18

    Default Convert from flame arrestor to K&N

    I just bought a 06 mobius xlv and it has the 325hp motor in it. It has the round metal type flame arrestor that sits just under the engine cover. Is there a way to convert it where it has a k&n cone style filter? If not, what k&n p/n flame arrestor do I need to just replace the one that comes standard with the boat.

  2. #2
    Join Date
    Mar 2008
    Location
    Brentwood, CA
    Posts
    210

    Default

    I've also been thinking of doing this for a while. Anyone done it yet???
    We are eternal, all this pain is an illusion.

  3. #3
    Join Date
    Mar 2003
    Location
    s.e. washington state
    Posts
    2,087

    Default

    As long as they are marine approved you won't get fined.
    1998 Mobius
    310 HP PCM

  4. #4
    Join Date
    Jun 2008
    Location
    De Pere WI
    Posts
    4,139

    Default

    got inspected sunday at the ramp.
    watercop asked me where the spark arrestor is. told him I didn't know(cause I don't). he pointed to the air intake that looks just like a k&n. asked me what brand it is. told him I didn't know, that it came with the boat. told him it was an '06 340hp catalyzed motor. he said "new enough, your good" and closed the hatch....
    figure most are that easy??
    '06 Supra Launch 20SSV-gone but never forgotten

  5. #5
    Join Date
    Mar 2003
    Location
    s.e. washington state
    Posts
    2,087

    Default

    Good comeback. They probably know K&N but don't have a clue what you said at the end. That could work for a long time.
    1998 Mobius
    310 HP PCM

  6. #6
    Join Date
    Jun 2008
    Location
    De Pere WI
    Posts
    4,139

    Default

    sad thing is I really don't know. it might be a k&n. bought boat as a skiers demo, so I doubt it, but it looks just like ones I have had on my evolutions, and I haven't ever taken it off.
    suppose one of these days I'll dig into it, but if the boat runs fine and it's not preventative maintenance, why bother it.
    '06 Supra Launch 20SSV-gone but never forgotten

  7. #7
    Join Date
    May 2009
    Location
    Carlton Oregon
    Posts
    6,008

    Default

    I got hit up by the Water patrol 2 weekends ago and when i opened the hatch he asked me to remove the plastic cover on the engine and he looked at it and said looks like a flame arrestor to me.

    I couldnt resist and said well this boat is Fuel injected so theres no carb and hince to flame arrestor.

    Hes like good to know and moved on with the inspection.

    Got my 09 safety tag on the boat.
    Malo <--- Means--Evil or Mean One. This explains a lot.
    2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
    Exile ZLD
    6 SX65M Cabins
    6 XM9 Towers
    1 XI Big 15 Woofer in a custom Fiberglass box
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    Custom 1 Off Evolution Cover

  8. #8
    Join Date
    Jun 2008
    Location
    De Pere WI
    Posts
    4,139

    Default

    yea, I have had many k&n's before, and this one looks just like one. at the end of the air intake, it's just clamped on and open to the engine compartment.
    I wouldn't have believed that it's a different filter from factory as the boat was "new" from the factory when we bought it, but it was one of the first '06 models and used in some photo shoots, so maybe the real intakes weren't done yet.

    the one thing I will never understand is the grey piece of plastic held on with velcro tabs that simulate intake runners on the top of the intake manifold.. what is the point and why did they feel necessary to put that on? seems a waste of money..
    '06 Supra Launch 20SSV-gone but never forgotten

  9. #9
    Join Date
    Apr 2008
    Location
    California
    Posts
    2,840

    Default

    All Indmar 340 CATs have the clamp on K&N Cone style air filter, Indmar stated the 340 CAT Cone setup is not compatible with the 325 ASSAULT.

    For those that want a K&N filter use Indmar part #525027 to retro a K&N to replace the flame arrestor, it will look similar to the flame arrestor and not cone shaped. In order for the cone shaped filter to work you would have to have a custom plenum or such.

    Here's the page for K&N Marine Flame Arrestors
    Last edited by Razzman; 05-21-2009 at 10:53 AM.
    2007 Mobius LSV

  10. #10
    Join Date
    May 2009
    Location
    Carlton Oregon
    Posts
    6,008

    Default

    When i remove the black plastic cover on my engine and there's a silver round, whats looks like an air cleaner, what exactly is that?

    Is it an air filter i can upgrade? Doesn't look like an air filter to me.

    08 325 assault
    Malo <--- Means--Evil or Mean One. This explains a lot.
    2013 Mojo 2.5 Skylon Tower. Bestia < Beast >
    Exile ZLD
    6 SX65M Cabins
    6 XM9 Towers
    1 XI Big 15 Woofer in a custom Fiberglass box
    1 XI 1K Harpoon
    2 XI 800.4
    1 XI 2500.1
    2 Interstate 2400U 6V Golf Cart Batterties
    Custom 1 Off Evolution Cover

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