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Where do I start

D

dnd

Member
Looking for some guidance.. I acquired a 6 cylinder moline power unit, 605 cubic inch engine. It’s 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 don’t 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
 
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.
 
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.
 
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.
 
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.
 
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.
 
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 haven’t 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.
It’s an Ensign regulator and it’s a Model R.
It’s starting to get cold here in Wisconsin now, so I have lots of time to get this dialed in before corn planting starts.
 
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.

MMDEL
 
Here it what it looks like, Ensign Model R. Thanks,, Dan
cvphoto69489.jpg
 
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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