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  #1  
Old 06-17-2005, 10:46 AM
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Onan Generators -ANY EXPERIENCED MECHS?

Any experienced Onan generator guru's out here? My genset shuts down after start button is released

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  #2  
Old 06-17-2005, 01:18 PM
MedMech
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Quote:
Originally Posted by TX76513
Any experienced Onan generator guru's out here? My genset shuts down after start button is released
Check the oil, do you have a auto transfer switch?
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  #3  
Old 06-17-2005, 01:19 PM
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If the oil is a tad bit low it will trip the low oil safety switch, it's fine when starting but when the engine get running the oil is lower in the crankcase and then shutsdown.
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  #4  
Old 06-17-2005, 01:49 PM
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What sort of message are they sending by naming their products Onan? Repent sinners!
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  #5  
Old 06-17-2005, 03:24 PM
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Quote:
Originally Posted by MedMech
Check the oil, do you have a auto transfer switch?
That was my first hunch oil ok and oil shutdown relay is good. Did get my hands on a schematic at lunch. Looks like if the relay board gets a bad signal from the generator it will shut down. Going to look at brushes on generator.
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  #6  
Old 06-17-2005, 03:28 PM
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Quote:
Originally Posted by TX76513
That was my first hunch oil ok and oil shutdown relay is good.

What type of fuel? If the transfer switch relay is bad you could have the problem that you are experiencing.

I must add aside from tinkering with boat generators my knowledge is very limited.
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  #7  
Old 06-17-2005, 03:29 PM
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Quote:
Originally Posted by TX76513
That was my first hunch oil ok and oil shutdown relay is good. Did get my hands on a schematic at lunch. Looks like if the relay board gets a bad signal from the generator it will shut down. Going to look at brushes on generator.
does it work with the main breaker off?
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  #8  
Old 06-17-2005, 04:20 PM
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Quote:
Originally Posted by MedMech
does it work with the main breaker off?
No off/on do difference in operation - fuel = gasoline
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  #9  
Old 06-17-2005, 04:37 PM
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OK - Bad brushes in the generator $20 for a new set and all is well. Evidently if the brushes are bad the starter control card shuts the motor down
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  #10  
Old 06-17-2005, 04:48 PM
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Wow, what a quick diagnosis...
Now back to those blue haired ladies....
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  #11  
Old 06-17-2005, 05:26 PM
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Originally Posted by H2O2
What sort of message are they sending by naming their products Onan? Repent sinners!
This post is a candidate for "How many forum members does it take to change a light bulb"
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  #12  
Old 06-17-2005, 05:50 PM
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Quote:
Originally Posted by leathermang
Wow, what a quick diagnosis...
Now back to those blue haired ladies....
I talked myself through the repair and...
YEAH first trip tonight
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Last edited by TX76513; 06-17-2005 at 06:54 PM.
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  #13  
Old 06-17-2005, 09:01 PM
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Quote:
Originally Posted by H2O2
What sort of message are they sending by naming their products Onan? Repent sinners!
I think you start'em one-handed.
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Old 06-17-2005, 11:41 PM
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Quote:
Originally Posted by Botnst
I think you start 'em one-handed.
Reciprocating single cylinder ?


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  #15  
Old 06-18-2005, 09:02 AM
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Two Stroke.

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