[SEL] Attention Aussies - Austral Question

[Brian Watts]

The way we set the timing vale is as stated in the Blackstone instruction 
instruction book,on the compression stroke with  the crankshaft at 25 
degrees bofore top dead centre the timing valve should be open .004 (4 thou) 
,a bigger gap will gause the fuel vapor to ignite early and cause pre. ign. 
smaller gap will retard and cause eng. to stop.
With crack in the lower ign. chamber we just cut the lower chanber of and 
make a new chamber out of cast iron bar and weld it to the hot bulb, this 
system has been used for the last 20 years and work well, no failures yet.
----- Original Message ----- 
From: "Arnie Fero" <fero_ah at city-net.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Cc: "'Old_Engine'" <stationary-engine at oldengine.org>
Sent: Sunday, March 11, 2007 2:11 AM
Subject: Re: [SEL] Attention Aussies - Austral Question


> G'day Patrick,
>
> Thanks for the Blackstone pic.  As always, when one has to work from
> pictures, this raises a number of additional questions.
>
> Your Blackstone is a pretty awesome restoration project BTW!!  8-))
> http://www.oldengine.org/members/pml/blackstonemain.html
>
> Can you talk me through the "and the magic happens here" bit with regard
> to that vaporizer?  Even with the sectioned view its not absolutely clear
> how things flow.  Let me describe what I think is happening and perhaps
> you can put me back on the rails when I run off?
>
> As you face the engine, the initial atomized air/kero mix enters the outer
> chamber from the left.  When the vapor valve (located on the right side)
> is operated it allows transfer from the outer chamber to the inner
> central chamber.  As we've discussed, that mix is too rich to ignite.  The
> mix moves into the head via the timing valve, mixes with more air, and
> comes back into the vaporizer again on compression via the timing valve to
> be ignited.
>
> I think the ignition coil is in the main central chamber, correct?  What
> is in that connected lower chamber (with the side rusted out)?
> http://www.oldengine.org/members/pml/myengines/blackstone/03091511.JPG
>
> On the Austral, the timing valve is located nearest to the head and is
> horizontal.  The vapor valve comes in from the top and the air/kero gets
> sucked in from the side.  Then there's what looks to be an upper and a
> lower chamber, each of which has some bits screwed in.  Rob, which is the
> ignition coil case; upper or lower (upper I think)?  And what's the other
> one?  There's also a pair of plugs screwed in to the vaporizer; one in
> the "front" and one in the "rear top" above the timing valve.  Any
> thoughts on those?
>
> Thanks!!
>
> See ya,  Arnie
>
> On Sun, 4 Mar 2007, Patrick M Livingstone wrote:
>
>> For a bit of help here is the sectioned hot-bulb off my Blackstone. They 
>> are
>> identical in design to the Austral ones:
>> http://www.oldengine.org/members/pml/myengines/blackstone/04062614.JPG
>>
>> And here's a look at the vaporizer with the outer heat shield removed.
>> http://www.oldengine.org/members/arnie/Zolfo_2007/Vaporizer.jpg
>
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