Author Topic: Soot from Hurricane Exhaust Pipe  (Read 2961 times)

Michelle Jensen

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Soot from Hurricane Exhaust Pipe
« on: December 11, 2021, 11:49:08 PM »
We have a 1998 Patriot and are now experiencing soot blowing out of our Hurricane exhaust pipe.  This started after our motorhome was in the shop for several months.  Prior to that we had someone come out and do a regular maintenance/service job and it was working great.  We're thinking it might be a clog in the pipe or perhaps the nozzle???  Has anyone ran into this problem and if so, how did you resolve it?

Thanks for your help.
-Michelle

Fred Brooks

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Re: Soot from Hurricane Exhaust Pipe
« Reply #1 on: December 12, 2021, 01:27:54 AM »
      Michelle,
 I would start with cleaning the nozzle and changing the fuel filter on the backside of the compartment. Another thing we have discovered on coaches of that era (including mine) is where the hurricane exhaust pipe after muffler transitions into the rectangular exhaust pipe, the inside rust builds up and plugs up the pipe. Unfortunately, you can't see the restriction unless you remove the muffler to look inside. Fred
Fred & Cindy Brooks
2000 Marquis, Jasper
C-12 Wild Cat (U of A)
2014 Honda CRV
Proverbs 3: 5 & 6

Eric Maclean Co-Admin

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Re: Soot from Hurricane Exhaust Pipe
« Reply #2 on: December 12, 2021, 01:05:01 PM »
Michelle
If your getting black sooty smoke at the exhaust your unit is running rich this could be one of two things too much fuel (bad nozzle) or not enough air this could be anything from partially blocked intake ( mud robber next) to exhaust blockage as Fred mentioned or even the bower assembly getting weak.

My bet would be on a partially blocked intake or exhaust

Hope this helps
Eric
1997 Patriot Yorktown
3126-B
2009 Chevy HHR
Roadmaster falcon tow bar
Demco Air Force one tow brake.

Fred Brooks

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Re: Soot from Hurricane Exhaust Pipe
« Reply #3 on: December 12, 2021, 01:45:15 PM »
    Michelle, I think Eric's "auto spelling correction" meant to say "mud dauber nest" may have blocked the air intake which would cause a rich condition. Please advise how it turns out. Merry Christmas! Fred
Fred & Cindy Brooks
2000 Marquis, Jasper
C-12 Wild Cat (U of A)
2014 Honda CRV
Proverbs 3: 5 & 6

Michelle Jensen

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Re: Soot from Hurricane Exhaust Pipe
« Reply #4 on: December 14, 2021, 09:20:25 PM »
Hello gentlemen -just want to let you know what the issue was.  The nozzle had been cleaned when we had it serviced a couple months ago and so it was fine.  But, the fuel filter underneath the coach behind the Hurricane was filthy.  We replaced that and ran it for an hour and there was no soot.  It has since come on and off and still nothing.  So, turns out that is one more thing that can make it run rich.  Thanks so much for your help!

Michelle Jensen

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Re: Soot from Hurricane Exhaust Pipe
« Reply #5 on: December 17, 2021, 09:42:23 PM »
Well I thought I'd update you.  It was doing good but our hurricane is blowing soot again.  So it's back to the diagnostic stage again. We should have known that changing the filter would be too easy of a fix :)
 I'll let you know what it finally ends up being. 

Fred Brooks

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Re: Soot from Hurricane Exhaust Pipe
« Reply #6 on: December 18, 2021, 01:25:48 PM »
    Michelle,
 You may want to check and see if the compressor is operational or the inlet filter to the compressor may be plugged. The compressor is responsible for pressurizing the combustion chamber with air pressure for the complete burning of the atomized mist of the nozzle. Sometimes when servicing the unit, the technician doesn't tighten the cover or damages the cover seal and causes a leak so it can't pressurize properly. Fred
Fred & Cindy Brooks
2000 Marquis, Jasper
C-12 Wild Cat (U of A)
2014 Honda CRV
Proverbs 3: 5 & 6