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Antique Gas Engine Discussion

LPG valve for 6hp M.


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  #1  
Old 05-30-2005, 05:19:56 PM
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Default LPG valve for 6hp M.

Did some playing with LPG gas lately to run my 6 hp M and found out she runs fine on it. When the engine was running on kerosene, I closed the needle valve and the damper plate and put the gas hose through the
damper plate hole and she runs on LPG and got it down to 140 rpm. Today I made a new damper plate and soldered a lunkenheimer angle drip valve on it and had the possibility to adjust the gas flow. It works great that way, slowly turning the needle valve I could make 80 rpm. Like it much so will use it at shows once in a while I think.
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Old 05-30-2005, 05:47:18 PM
Harvey Teal Harvey Teal is offline
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Default Re: LPG valve for 6hp M.

Looks great, John. What gas pressure are you using? I like the Lunk angle valve, don't think I have seen one of those here.
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Old 05-30-2005, 06:10:15 PM
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Default Re: LPG valve for 6hp M.

I think 0.35 pressure, that's the most usual that these lpg valves are adjusted. They were mostly used on milking units in the field and driven by the English Wolseleys. But they are still adjustable you need a meter to check them. Here at this side of the pond there aren't many lunks, all the ones I have come from the States.
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Old 05-30-2005, 06:21:36 PM
Harvey Teal Harvey Teal is offline
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Default Re: LPG valve for 6hp M.

Thanks, John. I'll have to convert your figure to the English system, a standard service pressure for Propane here would be 10 to 11 inches water column. Considering the way modern gasoline deteriorates in storage, I am considering running my show engines on Propane/LP. Your system looks like a nice way to get the M's running slowly. I especially like the look of that Lunk valve.
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Old 05-30-2005, 06:32:56 PM
Harvey Teal Harvey Teal is offline
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Default Re: LPG valve for 6hp M.

It appears that Essex Brass have a number of sight feed oiler valves that would work well for this purpose. Along with some ornamental brass tubing, maybe it could be made to look like a factory job. Now you have me thinking.......
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Old 05-30-2005, 07:13:52 PM
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Default Re: LPG valve for 6hp M.

Is this set up constantly feeding LPG or does it only give it on demand, i want to try this on a 10 HP M with a bad fuel tank while i am getting a new one made. I must say that angle valve looks very very nice John

Mike
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Old 05-31-2005, 12:51:24 AM
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Default Re: LPG valve for 6hp M.

Mike it gives LPG on demand and I wouldn't try it myself without cause I'm a little scarery for "BOOMS".
As you can see in the picture of the LPG valve set, the Red one is for pressure and the Blue one is the demand valve.
I'm sure your Ten Horse will run nice and quietly on LPG.
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Old 05-31-2005, 06:41:56 AM
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Default Re: LPG valve for 6hp M.

Where do you pull your vacuum from?
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Old 05-31-2005, 09:32:13 AM
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Default Re: LPG valve for 6hp M.

The damper plate is almost closed and the engine sucks the gas out of the bottle. With the damper plate a little open 1/32" to 3/32" it sucks enough fresh air for a very good LPG mix. I tested the consumption and it took 0.75 lbs of LPG in two hours. I use 10 lbs bottles so one is more than enough for the weekend show.
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Old 05-31-2005, 11:21:45 AM
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Default Re: LPG valve for 6hp M.

Now i guess the next challenge is to find one of these regulator


Thanks

Mike
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Old 05-31-2005, 12:08:50 PM
Harvey Teal Harvey Teal is offline
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Default Re: LPG valve for 6hp M.

Mike, a Beam Garretson KN will do the trick. It is a zero governor, or vacuum demand regulator, commonly used on LP-powered backup generators. It must be preceded by a primary regulator. MAX inlet pressure to the KN should be 11" water column, probably 5-6" will be plenty. Check and adjust the outlet pressure from your primary regulator BEFORE connecting it to the KN.
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Old 05-31-2005, 01:18:03 PM
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Default Re: LPG valve for 6hp M.

I had very good luck running my 6 M off of LPG I was pleased with the end result. Now for my next trick I am going to build a hot tube for it and do away with the high priced Mags Joe M.
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