Sounds like regulator is going bad.Or you have some bad connections.You should talk to Flight Systems. They have a check list that can help check it out.Also they will talk with you.I have used them for years. Very good company with people that know what they are talking about. Not some kid reading out of a book.
I believe they sell the 300-1540 for around 200.00. Better board than Onan with a better warranty. They do have a rebuild service and can check yours. To make sure it needs repairs. They will not rip you off.
The turn around time is four days. Depending on how busy they are. If you need a manual. Go over to smokstak Onan section. Post the full model and serial number and an email address. You will get the manuals you need for free.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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