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Onan Generators

What Have You Done to Your Onan Generator Today?


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  #1851  
Old 09-20-2015, 03:10:33 AM
YellowLister YellowLister is offline
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Default Re: What have you done to your Onan generator today?

jump the solenoid and see if she cranks.. get the part number from it.. very common for people to put ford solenoids on them thinking they are the same..
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  #1852  
Old 09-20-2015, 10:57:21 AM
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Jim McIntyre Jim McIntyre is offline
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Default Re: What have you done to your Onan generator today?

Quote:
Originally Posted by len k View Post
...In another life I had to write several MTBF reports on electronic packages we sold to prime aircraft companies....
I'm familiar with those myself. They don't take into account things like the fact that in the real world, a magneciter gets burned up if the engine looses speed.

So, while the numbers from the rel prediction may look better, it doesn't always work out that way in practice. IOW just having a higher predicted reliability doesn't mean it'd have a higher reliability in actual usage.
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  #1853  
Old 09-20-2015, 11:05:17 AM
Leon N. Leon N. is online now
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Default Re: What have you done to your Onan generator today?

Jim, I will take the risk of losing RPM vs the susceptibility of the Onan electronics any day.
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  #1854  
Old 09-20-2015, 12:15:25 PM
zombierspndr zombierspndr is offline
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Default Re: What have you done to your Onan generator today?

Quote:
Originally Posted by yellowlister View Post
jump the solenoid and see if she cranks.. get the part number from it.. very common for people to put ford solenoids on them thinking they are the same..
I jumped across the two large terminals and it cranked. Evidently none of the local parts houses keep an appropriate solenoid in stock, so I've got one on order. My next step is to remove each wire and give all the terminals a good cleaning....maybe it's just a bad connection. Waiting for the rain to stop.
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  #1855  
Old 09-20-2015, 05:32:36 PM
zombierspndr zombierspndr is offline
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Default Re: What have you done to your Onan generator today?

After a few hours of removing and cleaning connections and some more continuity/voltage testing I think I might have finally found the cause of the NH6.5-3CR-16004P not cranking. The solenoid was good, and had the original part number on it. I probed for continuity between the B+ solenoid connection and the F1/F2 fuses to find that there wasn't any. Strange, the fuses were good and I have continuity between the fuse holders/ends of the fuse holders. I finally isolated it to the K1-B+ wire, which is evidently broken internally. It appears that I don't have the right size ring terminals, so time for another trip to town. Need to order some brady wire markers too.

I hope my next post is news of victory.
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  #1856  
Old 09-20-2015, 05:42:18 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Problem with MTBF calculations is they assume the circuit is designed properly.

When many non-military companies first started using IC's they frequently failed to properly consider static and over voltage protection. Semi-conductors are sensitive to that stuff. Copper wire.....not so much.....
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  #1857  
Old 09-20-2015, 06:40:30 PM
YellowLister YellowLister is offline
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Default Re: What have you done to your Onan generator today?

Went on a 200 mile round trip drive to pick up this like new ccka. Made 1 of 89.. paid 50 for it.. to bad its 3600 rpm.. but for 50 bucks couldent pass it up. cost me 40 or so in fuel in my 2015 ram hemi to get it.. has not run in 10 years or so.. the old owner got two hercules powered gennys for his property.. after I told him the ammount of fuel they use he is thinking of selling or trading me them for one of my nhs..

had to clean points to get spark.. and rebuilt the carb, got it to pop.. but not start yet.. need to get a bigger pull handle..
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Last edited by YellowLister; 09-20-2015 at 11:16:54 PM.
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  #1858  
Old 09-20-2015, 07:42:16 PM
zombierspndr zombierspndr is offline
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Default Re: What have you done to your Onan generator today?

Victory!!!! It cranks just fine now. Unfortunately, I have no spark. It appears that the condenser is bad. Everything else tests and looks good.
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  #1859  
Old 09-21-2015, 06:05:46 AM
Viking66 Viking66 is offline
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Default Re: What have you done to your Onan generator today?

I set up an exhaust for my 6.0 DJE. It is still louder than i would like and i think the Can Silencer/Muffler? may be the problem.

I also put a new Fuel Pump Gasket on and that stopped the leak I had.

Silencer/Muffler in the pic. Needed?
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  #1860  
Old 09-21-2015, 08:59:16 AM
PopsGarage PopsGarage is offline
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Default Re: What have you done to your Onan generator today?

Viking, route the exhaust outside, your generator will be almost silent


Bob
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