Hello, I need to appeal to every ones good nature and knowledge. I have a 1973 Yale G83P-050-SAT-086 Serial # A271738 and i am having a hello of a time getting this thing to run. I have replaced the distributor, plugs, cap, rotor. ign. coil, and the ballast resistor. Now i believe a mouse got into the dash wiring and had a field day. Now all the wires are the same color and are so old that they crumble under your touch. After a fair bit I got it to turn over but had no spark. My distributor had so much play up and down it broke the rotor in side the cap. I replaced the distributor, cap and rotor. still no spark. I replaced the coil and ballast resistor. Now i have spark but loose voltage during crank. So I tested the voltage during crank and it was at less than 5v. So I installed a relay to apply battery voltage during crank only. Now I have spark and no fuel. It ran for two seconds after i poured an alternate fuel down the LPG mixer. Took apart the LPG regulator an it was so full of sludge that i new it couldn't allow LPG to pass through. Rebuilt it. Now I have fuel, Try again, now I have no spark again. This is driving me insane let alone the costs are elevating. I ordered a third coil t see what it will do. I have contacted my local dealer and tried contacting Yale. But I can not get a hold of them. Most dealers can't go back beyond the year 2000. They don't seem to want to go back to the archives and look in the books. Again any help would be very much appreciated. thank you in advance.
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Thank you very much for all your assistance. I'm checking all the body grounds as I'm typing this reply. After testing as follows.... across the battery = 12.72. From the battery to the block at the neg. cable= 12.69. Battery to the frame =12.69. This is the same value throughout the entire unit.
I will send what I have. For the points, check all your frame grounds for the truck. Using the positive post on your battery, measure voltage across the battery. Now move your negative lead to each frame ground and check for voltage drops. Anything over.5 volts needs to be checked. Thanks
I'm looking for a detailed wiring schematic. That shows ignition, gauges. I'll take anything you are will to see. Man if I could get a copy of the whole manual that would be amazing. Working on the thing today I found out that the points are not grounding properly. It seems when I jump the point from ground with a screwdriver I get solid spark. If I just open the points there is little to no spark.
This is about as old as you can find. I believe I have a manual the covers this year and model. What specific information are you looking for. I will see what I can still find.
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