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Where do I start

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12-24-2020 11:49:29

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Looking for some guidance.. I acquired a 6 cylinder moline power unit, 605 cubic inch engine. Itís LP, I have spark but it does not fire off. I think I have an LP issue. A friend on my suggested that I change out the complete vaporizer and the carburetor. Again, I donít hav a lot of experience with LP engines and I am only planning on mounting it to a agon running gear and taking it to our sho f display purposes but I want it to start good and operate.

Any ideas who or where I should call to get the proper vaporizer and if I need it the carburoator.

Thanks. And Merry Christmas

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12-31-2020 13:19:30

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
In order to check gas supply to carburetor(sometimes referred to as a mixer) remove 3/8 red rubber line from carburetor and put it to your mouth and pressurize it lightly. This will open the vapor diaphragm in the vaporizer/regulator. You should readily hear the flow of L.P. vapor into the carburetor. If not, you have a problem with the vaporizer/regulator or the gas supply there to. Do this procedure using vapor, not liquid.

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12-30-2020 11:25:49

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
If you could, take some close up pictures of all the LP components and post them so we can begin to to tell you what to do first. It helps tremendously if we are talking about the same part when we communicate.


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12-31-2020 12:19:52

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 Re: Where do I start in reply to MMDEL, 12-30-2020 11:25:49  
Here it what it looks like, Ensign Model R. Thanks,, Dan

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12-28-2020 07:34:03

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
Don't do anything drastic. Often times a little simple problem gets blown out of proportion and people tear down, overhaul, put on new parts, and waste a lot of time and money. You say you have spark. Where at? Is it at the end of the plug wire. If so take out the plugs, clean and gap at .015. Then make sure all cyl have good compression. No valves stuck open. If that is all good, crack the line open where LP goes into the vaporizer. Then open the VAPOR valve on the tank partially. If gas escapes there with force. everything should be OK between there and the tank. From there on we need to know what make system is on the unit.

Don't convert it to gasoline! You will destroy the originality of the unit depending how it is done might look cobbled up. There is nothing mysterious about an LP tractor or Ind engine. the cleanest fuel for an engine.

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12-28-2020 17:21:30

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 Re: Where do I start in reply to MMDEL, 12-28-2020 07:34:03  
Thanks for the tips, Sorry for my ignorance as this is the first LP I have ever worked on or owned. I have spark at the plug wires and I put in new plugs. I havenít check compression though on the cylinders.
For a source for fuel to get it started I just connected a 100lbs. Cylinder to the vaporizer with a high pressure hose. Itís an Ensign regulator and itís a Model R.
Itís starting to get cold here in Wisconsin now, so I have lots of time to get this dialed in before corn planting starts.

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01-10-2021 19:15:06

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 Re: Where do I start in reply to dnd, 12-28-2020 17:21:30  
Where in WI are you? I may be able to help you out a little if close by.

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12-27-2020 04:03:50

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
The last time I had a problem with mine it was a little dirt in the vaporizer. When the propane company filled my tank they checked for leaks and found a small leak in a pipe fitting, when they fixed it that little bit of dirt from disassembly and reassembly was enough to foul the vaporizer. Fixed it myself that time.

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12-24-2020 23:07:18

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
On any LP fueled engine start it on vapor only, Do not feed liquid to the vaporizer until the engine is warmed up and has warm water heating the vaporizer.

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12-24-2020 16:56:00

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
Well, since you say you have spark, it may not be the safest thing, but I would spray a little carb cleaner in the carburetor as it turns over and see if it fires. If it does, you know you have spark at the right time and you have compression. Then work on fuel.

Do this at your own risk, however. If a valve is open, you could have fire come out of the intake.

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12-24-2020 16:08:40

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
Generally, the carburetor is very seldom an issue. The vaporizer/regulator can need cleaning. Be ever so careful in disassembly with diaphragms and gaskets. Not available for some Ensign units.

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Whiskey Bent

12-24-2020 15:19:40

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 Re: Where do I start in reply to dnd, 12-24-2020 11:49:29  
Might be easier to put a gas carburetor on it get rid of the LP system.

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