Wisconsin vg4d starting problems

Hi folks first time to this site. I have a wiscosin vg4d running a Kohler genset. I purchased this from a guy for 500. He told me it was taken out of a nursing home when they upgraded to another generator. This unit runs on lp. I can get the generator to turn over but I had no spark. I put a new magneto in it and now I get spark. I think my problem now is with the propane supply. Currently, I have the unit being feed with propane from a 20 lb tank ( like from a gas grill). I don’t have any regulator in the line from the tank to the supply line and I just open the tank full. Now on the generator itself there is a Eaton electric “g-lp valve” NC-1014-31E which is marked with the following on it:12vdc .9amps, .6 psi. next it has a short run of pipe and then connects to a Maxitrol valve with the following markings on it RV52 class I and II po 3-6”. Then is goes to what appears to be another valve connected to the carb with the following markings:Impco caldo A-256243. It is my understanding that the Eaton valve is used to stop or allow the follow of propane when it senses a drop in vaccum or a need for fuel? And the Maxitrol is used to drop the propane pressure down to a point where the carb can use it? My question is what should I do next? Do I need to use a valve like from a propane grill right off of the tank??? I don’t know I am stuck at this point any help would sure be appreciated. I can add pictures if you guys need them. Thanx in advance Jamie.

I would convert it to gasoline.

Normally LP is supplied at 14 inches water column pressure (.5 psi) to the generator. You would need a regulator at the LP tank to drop tank pressure to 14". Hopefully the only problem you have is the Eaton valve would not open under full tank pressure (which can be as high as 250 psi). A 20lb tank can not supply enough volume to run the generator, but should be able to start it.