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Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

What Have You Done to Your Onan Generator Today?


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  #511  
Old 03-05-2014, 11:00:17 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Mica sheets...... old toasters have them.
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  #512  
Old 03-06-2014, 09:08:30 PM
Xeonpony Xeonpony is offline
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Default Re: What have you done to your Onan generator today?

By new I mean brunt out heat gun. I just painted it replaced the possitive gasket and got it assembled, just fine tuning the resistence now
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  #513  
Old 03-12-2014, 09:23:30 PM
Xeonpony Xeonpony is offline
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Default Re: What have you done to your Onan generator today?

Now 4 steps from my electronic ignition conversion for my 3AJ onan! got the alu bracket made the petronics modual mounted and dry fitted it to the gen set!

Will dismantle and take lots of picturs for others to do the sale! and I'll scan the template I make for it.
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  #514  
Old 03-15-2014, 06:54:06 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Ran my 7NHM for an hour today. Had airfilter assembly off still, not finished working on it. Decided to attach it to ventilate crankcase. Noticed a bit of water dribbled out, must be condensate. It was still apart the last few times I ran it, and crankcase had not been connected to airfilter. So I made air flow thur crankcase for another 45 minutes.

When cranking starter 1-st time engine cranked but didn't catch. 2nd time engine cranked then starter sliped and spun up. 3-rd time cranking it sounded like starter gear hit ring gear like a bell, 4-th time engine cranked and started. I'll take it apart when it's warmer outside, guessing starter throwout gear assembly is bad. Anyone else run into this?

Saw some acorns on top of engine last time I ran it, so I added bunch of mothballs on top of engine to try to keep mice away.

Last edited by len k; 03-15-2014 at 08:37:07 PM. Reason: starter issues
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  #515  
Old 03-15-2014, 08:25:12 PM
Kpack
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Default Re: What have you done to your Onan generator today?

Len I had trouble with mine. That starter gear slips if the engine is to hard to turn. I guess to keep from burning it up.
I took my old starter off and clamped it to a gate and applied 12 v and it spun good but if I held the gear it wood just chatter so I got a new starter from cummins it did the same thing. When I set the valves it made it easier for the starter to turn it.
Turn your flywheel by hand to see if there's any hard spots.
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  #516  
Old 03-15-2014, 08:33:20 PM
Viking66 Viking66 is offline
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Default Re: What have you done to your Onan generator today?

I have been working on the exhaust for my 6.5NH-3CR 16004P. I have the pipe that goes down to the front. A real pain to work on actually.

I have a good muffler for it, and worked together some exhaust fittings to connect everything up.

I cannot get the main flanges to not leak. I am going to try an exhaust flange doughnut and see if that will do it.

I am also trying to work a plan for a way that 4 men can lift the unit. I need to do this because it will be loaded onto a boat and brought to my Camp. Then off loaded and installed in my Generator shed. I am looking at bolting some 4X4 under the plate, drilling some 1" holes and using some black pipe that will stick out for lifting. This can also be removed once the unit is in place.
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  #517  
Old 03-15-2014, 08:41:14 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Sounds like it has some type of slip clutch in it, don't remember seeing that in a car starter. Strange to have a slip clutch , it will heat up and wear. Sounds like some plastic part is poping out and slipping. No hard spots except for normal compression strokes. Little mechanical noise, I'll adjust valves when it's warmer out.

Last edited by len k; 03-15-2014 at 11:13:35 PM.
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  #518  
Old 03-16-2014, 08:18:32 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Was a balmy 22 degs today. So I cleaned slip rings on my 7NHM, first time since I owned it. Got a nice steady ~20 ohms between brushes all way arround. Now to let it sit ~3 months as see how high contact ohms rises. AC Reg is still out.

Last edited by len k; 03-16-2014 at 08:54:57 PM. Reason: add temp
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  #519  
Old 03-17-2014, 11:48:53 AM
vegaman vegaman is offline
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Default Re: What have you done to your Onan generator today?

Removed and rebuilt carburetor on the 6.5 NH. Runs much smoother and sounds great. Steady output. A partially clogged jet can really cause surging and is worth the time to service it right.

http://www.youtube.com/watch?v=hxBsQDFU_jk
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  #520  
Old 03-18-2014, 02:05:02 PM
JerryLee JerryLee is offline
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Default Re: What have you done to your Onan generator today?

Several things lately.....see the porn. The glass beads blast cabinet will speed up the paint prep process. The 10 HP compressor will keep up with the air demand of the blast cabinet. The high roof, sans walls, will provide parking/storage for all sorts of things that don't need to be in my garage or workshop. I will double stack the barrels. They weigh 550 pounds each.
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Last edited by JerryLee; 03-18-2014 at 07:18:46 PM.
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