Home » Public Forums » GMCnet » Onan Control Board Question
| Onan Control Board Question [message #213987] |
Wed, 10 July 2013 23:27  |
bhayes
Messages: 263
Registered: March 2010
Karma:
|
Senior Member |
|
|
Greetings, everyone. First, a question: Does anyone know what a modern replacement part is for the Onan control board rectifier? It looks like a transistor and is described in the Onan Operator Manual on page 37, ref. 22, part 364-0011, as "Rectifier, Gate Control (8 Amp., 30 Volt). I have a bad Dinosaur control board board that uses a 2n5061 rectifier, though that part's specs are 60 volts and 10 amp surge rating. A 2n5060 seems closer to the original at 30 volts. The rectifier on my original control board is broken, but if I can find a suitable replacement, I should be able to muster some latent soldering skills from my childhood to put a new one in place.
And why am I asking this question? After having battled with my coach's temperamental Onan for years, it recently dug in its heels and refused to even consider starting. I threw several parts at it over the years, including swapping the control board with a Dinosaur board a few years ago. But after it recently folded its arms and shook its head at me when I pleaded with it to start, I finally decided to send the carburetor off to Walbro to have it rebuilt. Fortunately, they found and corrected several problems.
So I installed the newly rebuilt carb on the beast. It apparently was pleased because it happily fired right up. I ran the Onan for several hours with the A/Cs running, and it worked perfectly. Problem solved, I thought. Cautious optimism took hold, and we began planning our next weekend adventure (only our third in three years, unfortunately).
Now this next tale in the saga may have been pure coincidence. I was running the Onan last night while replacing the old and busted rear clearance lights with new and clever LEDs, and it was happily purring like a big kitten. When I finished for the evening, I innocently switched off the marker lights, and the Onan, apparently sensing that I was finally finding some satisfaction with the GMC, immediately shut down and refused to start. Same story as many of you have had--it cranks and fires up while holding the start switch down, but immediately shuts down when the switch is released. Whether or not it's somehow related to turning off the marker lights, I can't say.
I pulled the control board cover and jumpered terminals 5 and 9. The creature stirred and briefly mocked me, but finally threw up a white flag of surrender and came back to life. I unjumpered and jumpered the terminals a few times with the same results. Bad Dinosaur board again, it appears. But in a moment of daring, I dug out my old control board, hooked it up, and found that it ran the Onan just fine. I noticed, though, that the rectifier is missing half of its outer casing, which may have contributed to the problems I had with it before.
So that's the next chapter in my continuing saga of the ornery Onan.
Bryan Hayes
'76 Eleganza II
Salt Lake City, Utah
|
|
|
|
Current Time: Sat Sep 28 08:23:49 CDT 2024
Total time taken to generate the page: 0.01208 seconds
|
GMCforum
Search
Help
Register
Login
Home
