How come when I reply it doesn't go back to the group?  I forgot to "reply
all" so am forwarding to the group now.

---------- Forwarded message ----------
From: Alan Felder <dieseldoofus@gmail.com>
Date: Wed, Sep 9, 2009 at 7:16 PM
Subject: Re: Dometic RM182B orifice
To: David Beierl <dbeierl@attglobal.net>

Woops!  RM182A, or at least that's whats on the door.  Does have round
boiler case tho.  I would also be surprised if it had anything else in it as
well.  I used a cheap 25x pocket microscope from HF (I think), and used
daylight.  It is a dinky hole.  It took 45 minutes of holding the safety
override down to get gas from the tank thru the jet, after I installed it.
Starts great now.  In fact, I'm concerned that the flame is too hot or
somehting.  I don't have any experience with these so I have no benchmark.
I am running it again tonight, this time for two hours.  I think maybe the
thermostat sensor is not in contact with the evaporator fins inside, but how
much prob that is time will tell.  It is definately cooling.  I learned
tonight that you don't want to grab the exhaust vent thru the side vent
opening.

On Wed, Sep 9, 2009 at 6:49 PM, David Beierl <dbeierl@attglobal.net> wrote:

> At 07:19 PM 9/9/2009, Alan Felder wrote:
>
>> Anyone familiar enough with these brass fittings to say if the hole is
>> just
>> a hole, or is it supposed to have some quartz fitting inside the hole?
>> Dometic no. 24 jet.
>>
>
> I'd be pretty surprised if it did, in fact I can say categorically not.
>  I've looked at them under 40x and it's a pretty small hole but I've seen no
> sign of a ruby or anything else there.  I have some jewelers-size welding
> tips of which the smallest is ruby.  It's no tiny piece, the orifice is
> pierced in it and that's that.  Must be 1/16" across.  The stuff's cheap,
> wouldn't be worth their manufacturing effort to put the absolute minimum
> possible size in it.
>
>  Somewhere I read that the jets have some very small
>> insert of quartz or something, which would make the flame smaller I
>> suppose.
>>
>
> Actually a smaller hole would make it leaner.  If you cut air and gas down
> proportionally it would be smaller but keep the same mixture.
>
> A tip if it doesn't like to run at high altitude -- turn the gas pressure
> up a couple of inches W.C.  Dometic used to have a high-altitude jet, but no
> longer.
>
>  I have looked at mine with a microscope and don't see how there
>>
>
> Just for interest, what sort of scope and illumination?
>
> Yours,
> David
>
>

 --
Alan Felder
Austin TX
82 Diesel Westy

--
Alan Felder
Austin TX
82 Diesel Westy