Home » Public Forums » GMCnet » ONAN starting (starter stays engaged after starting)
| Re: [GMCnet] ONAN starting [message #320830 is a reply to message #320825] |
Sat, 22 July 2017 07:57   |
William Shourt
Messages: 35
Registered: August 2015
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Thanks Gene, K1 is wired like the picture. It is new Onan unit from Jim K. It was doing the same thing with the old one but it is doing it more often all the time.
Sent from my iPad
> On Jul 22, 2017, at 2:49 AM, gene Fisher wrote:
>
>> On Sat, Jul 22, 2017 at 2:23 AM Ken Burton wrote:
>>
>> In the following I am assuming that when this failure occurs that the
>> engine has started and is running. If it is not running then ignore the
>> following:
>>
>> It should not be the switch because K1's power should be dropped the
>> moment the engine starts. Even if you are still holding the switch down.
>> This
>
>
> Read here
> http://gmc49ers.blogspot.com/2016/04/onan-start-relay-k1.html
>
>
>
>> is because there is a N/C K2 contact in the circuit. K2 picks up from the
>> Onan Alternator when the alternator reaches 28 + volts AC. This happens
>> within a second or so of the engine starting to run.
>>
>>
>> If the engine is not running, then you need to go look at the start and
>> stop switch(es) and cabling.
>>
>> The start circuit is simple. The start switch(es) simply ground K1 which
>> applies power to the starter and also picks K3 to supply power to the
>> ignition and fuel pump.
>>
>> I'm a little confused by the voltage readings that you posted. If K1 is
>> energized, then the coil terminal should read 0 volts (to ground). If the
>> K1
>> coil is not energized then the K1 coil terminal should read battery
>> voltage which is around +12 volts.
>>
>> The 8 volt reading that you mentioned means that you have something with a
>> partial short or a short through another component to ground.
>> --
>> Ken Burton - N9KB
>> 76 Palm Beach
>> Hebron, Indiana
>>
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>>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
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