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Lew Poppleton (Lewpopp)

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Posted on Thursday, June 23, 2005 - 10:35 pm:   

Every time I run my genset, I try to run it long enough to completely dry the exhaust out. No matter how hard I try it sprews the sooty black crap out either on to my awning, or on my neighbor and my coach. Shouldn't there be some sort of weep hole to let the condensation out of the system rather that blowing out the top?
John Jewett (Jayjay)

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Posted on Thursday, June 23, 2005 - 11:12 pm:   

Lew, I welded a pipe fitting in the bottom of my riser stack, and installed a 1/4" ball valve just to take care of that problem. Incidently, the moisture on start-up is the sign of a healthy engine. ...JJ
Jim Ashworth (Jimnh)

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Posted on Friday, June 24, 2005 - 7:50 am:   

A 1/4" drilled hole is all you need at the bottom of the up pipe. Just be sure it stays clear. You will get an insignificant amount of exhaust gas out of it.

Jim
gusc

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Posted on Friday, June 24, 2005 - 6:05 pm:   

Why does anyone exhaust a gen at the top of a bus??

Carbon monoxide is heavier than air so this means the exhaust falls down, maybe into the roof vents or open windows.

In addition, the longer pipe means more back pressure to the small gen engine which has a very small exh pipe to begin with.

Exhaust it as low as possible and avoid many problems.
Jack Conrad (Jackconrad)

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Posted on Friday, June 24, 2005 - 6:33 pm:   

Actually Carbon Monoxide is lighter then air with a vapor density of .87. That is why the instructions that come with the carbon monoxide detectors state that the detectors should be mounted close to the ceiling. In addtion to the carbon monoxide, exhaust gases contain other gases that are all hotter than the ambient air and will rise.
As a Paramedic, I have been on 2 carbon monoxide poisoning calls in RVs. In both cases it was the RV next to them that had a generator running (without a vertical stack) and the fumes entered the RV next door. At Bussin' 2004, we had to have a bus move because his generator exhaust (no vertical stack) was in line with the neighbors RV door. When they opened their door, enough exhaust gases entered their bus to set off the carbon monoxide detector.
If you camp next to a RV running a generator without a vertical stack, park up wind or keep your windows closed and by all means, please, install a carbon monoxide detector, it could save your life. Jack
gusc

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Posted on Friday, June 24, 2005 - 9:03 pm:   

Jack,

I stand corrected. always thought the opposite. I once looked at a single story house to rent which was about 10' lower and very close to a major street. The reason I didn't rent it was because the exhaust fumes from passing vehicles permeated the whole house when any windows were open.

I have also observed that the exhaust from diesel truck vertical stacks falls down to the road, I've never seen it rise?
John Jewett (Jayjay)

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Posted on Friday, June 24, 2005 - 10:45 pm:   

Most likely what you see of a diesel's exhaust is the unburned hydrocarbons. Sort of like a stuck choke on a gasoline engine. ...JJ
FAST FRED

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Posted on Saturday, June 25, 2005 - 5:57 am:   

"Most likely what you see of a diesel's exhaust is the unburned hydrocarbons"

BUCKY BALLS! (to a physicist)

FAST FRED
Brian (Bigbusguy)

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Posted on Saturday, June 25, 2005 - 10:56 am:   

Have you tryed to clean the exhust with a big pipe cleaner type thing? My old Peterbuilt would do the same thing until I put on the duel 8" stacks with no muffler .No raining soot and loved that sound.

Brian 4905
gusc

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Posted on Saturday, June 25, 2005 - 1:27 pm:   

Lew,


If your gen is diesel ignore the rest of this.

If your gen is gas you can never get rid of the soot. When gasoline was first changed over to unleaded I noticed all my exhaust pipes that were nice and clean before were now sooty. After some research I found that this is normal and no amount of leaning will stop it so I have accepted this fact of life.

Also, as previously posted, the water is condensation from combustion and is perfectly normal, worse in cold weather.
Lew Poppleton (Lewpopp)

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Posted on Saturday, June 25, 2005 - 10:04 pm:   

gusc

It is a diesel and it was good to hear that a lot of condensation was good. Sometimes I feel like bottling it or hiding from my neighbor when I start it.

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