ONAN NHE 6500LP 85 volts! Trip starts tomorrow

[Soppy]

You could measure the voltage on the brushes and see if it changes when the voltage drops from 118v to 85v. Is the frequency still 60 hz when the voltage drops ? Have you measured the voltage at the generator windings before any breakers ?
I have seen partially shorted stator windings cause low voltage problems. Dirt from the fan blasted the varnish insulation off the windings and they shorted .It's just about impossible to find with a meter. Once you pull the generator apart , you will see the damage.

[hillbilly3]

Originally Posted by LETMGROW

I agree with this assessment. When I was first looking at my MH to purchase from a friend of mine the 110 V. line to the kitchen went to low voltage. (80 - 85 V.) The coach was just sitting in a storage barn warm and dry. There was also a pungent smell of something had burned. I tested between the black wire and the white wire on a kitchen plug and got an 80 V. reading. However when I tested from the black wire to ground I got 110 V.
Tracing back to my converter I found a neutral wire which had some signs of melted insulation where the wire was attached to the neutral bar. I removed the wire from the bar, stripped it back, inserted it into another opening in the neutral bar and testing showed I had 110 V. to the plug as normal.
After I bought my coach I removed every wire one at a time, cleaned the wire, treated it to some Silicone Di-Electric compound and installed the wire back into it's respective home. I check all the wiring I have access to every spring when I pull my MH out of storage. This includes the plug from my generator which is located on the wall of my wet bay. I do not have an auto transfer switch.
Lynn

Originally Posted by THenne1713

(Know this is now 2-wks old, but?) 6500W TELLS ME If 2-hots and a neutral and ground (dual 30a/25a)? 85v in a 240vac system is typical of an OPEN/ LOOSE NEUTRAL. If the only loads were equal light bulbs on each leg, voltage would be 120vac and 120vac as it split 240vac equally, but as loads get unbalanced w/ open neutral, one side goes HIGH while other goes LOW (by same amount, so +20-vac/-20vac would give 140-vac on Leg -1 and 100-vac on leg-2). One other SWAG is Brush/ Commutator poor connection?
Not uncommon on a house is to hear of 80/160vac, where utility company lost the Neutral back at the pole/ transformer.

Not the neutral if what the op states is true, they are losing voltage on both legs.