[SEL] old engines on Propane question

Larry Anger junkmeister2002 at yahoo.ca
Fri Nov 19 18:08:03 PST 2004


Steve - I'm very interested in propane also. Could you give me some insight as to how you constructed the "demand valve".  I would appreciate your hwlp so I could make one also. Thanks, Larry Anger, Tillsonburg, Ontario, Canada.

Steve Gray <segray at mlode.com> wrote:Hi Harry -

I also recently entered the world of propane, this being on a newly 
completed model. At first, I tried the simple approach of just piping 
the gas to the mixer (two ball valves, one air, one gas), but didn't 
like the idea of the unchecked gas flow if the engine stalled, and the 
results weren't that good as far as operation. I ended up fabricating 
a 'demand valve' which made all the difference in the world. The thing 
runs so good now I hate to tear it down to paint it! The engine is a 
Mery like those 2 that Reg recently finished. Pictures, sound and a 
video are located at the top of my main web page.

- Steve

-- 
Steve Gray
Member EDGE & TA, Br. 49 & 13
Sonora, California USA
e-mail: segray at mlode.com
Home page: http://www.oldengineshed.com



Harry Terpstra wrote:

>On the IHC Famous, we'll make a flange that will come between the mixer, and
>the manifold.
>It's about 12mm (½") thick, and we make a jet in the flange to hook up the
>propane.
>Works real good. We start on propane without much effort.
>When cold it's isn't running that great, but as soon as it warms up (after a
>couple of minutes) it runs real nice.
>
>We use it on a 4 or 5 engines. A few of them because on gasoline they are
>dripping / leaking very much.
>And our Witte headless, and the Monitor because on gasoline they get very
>dirty. Mainly because they have a (pre) combustion chamber.
>
>
>Harry Terpstra
>Sint Annaparochie
>Netherlands
>h.terpstra at wxs.nl
>http://home01.wxs.nl/~terps027/home.html
>
>
>
>----- Original Message -----
>From: 
>To: "The SEL email discussion list" 
>Sent: Thursday, November 18, 2004 12:01 AM
>Subject: Re: [SEL] old engines on Propane question
>
>
> 
>
>>>I've been following the thread on using propane. Could
>>>I ask someone to explain how this is done please? I'm
>>>guessing, but maybe just a zerk into the mixer fuel
>>>inlet fed by a gas regulator? Does running on gas
>>>require changes to any engine settings e.g. governor
>>>etc.
>>> 
>>>
>>Extremely complicated or
>>It can be as simple as sticking an orifice in the venturi
>>I have come across some field conversions that were
>>no more that copper tube necked into the mixer . One they
>>beat the tubing flat over what would appear to be a sewing needle
>>inserted into the bore of the copper tube , then withdrew it leaving a
>> 
>>
>tiny
> 
>
>>hole .
>>It is really easy to flood on gas , so they get started as Dave mentioned
>>and switched over
>>
>>My big ones , thru trial and error I learn where to mark with a scribe ,
>> 
>>
>set
> 
>
>>it thusly ,
>>and they start consistantly .
>>
>>
>>
>>Chuck
>>
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>> 
>>
>
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> 
>

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