Home » Public Forums » GMCnet » 4k Onan won't start
| 4k Onan won't start [message #337158] |
Fri, 21 September 2018 06:34  |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
Trying to get a 4k Onan to run. Onan had been idle for12 years or longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and lubed starter, lubed starter solenoid, points at .020". Have spark to both plugs. I can get the Onan to run when cranking starter but I have to manually close the governor. What pulls the governor closed when first starting the Onan? Have tried different settings on the spring and adjusting nut to no use.
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337160 is a reply to message #337158] |
Fri, 21 September 2018 07:54  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Make sure you have full 12 voltage .
Choke comes on only for short instant during cranking then governor opens it up when it starts running.
Sent from my iPhone
> On Sep 21, 2018, at 6:34 AM, Bruce Hart wrote:
>
> Trying to get a 4k Onan to run. Onan had been idle for12 years or longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and lubed
> starter, lubed starter solenoid, points at .020". Have spark to both plugs. I can get the Onan to run when cranking starter but I have to manually
> close the governor. What pulls the governor closed when first starting the Onan? Have tried different settings on the spring and adjusting nut to no
> use.
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337167 is a reply to message #337160] |
Fri, 21 September 2018 13:31 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
Have 12.4 volts
On Fri, Sep 21, 2018 at 7:15 AM Jim Kanomata wrote:
> Make sure you have full 12 voltage .
> Choke comes on only for short instant during cranking then governor opens
> it up when it starts running.
>
>
> Sent from my iPhone
>
>> On Sep 21, 2018, at 6:34 AM, Bruce Hart wrote:
>>
>> Trying to get a 4k Onan to run. Onan had been idle for12 years or
> longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and
> lubed
>> starter, lubed starter solenoid, points at .020". Have spark to both
> plugs. I can get the Onan to run when cranking starter but I have to
> manually
>> close the governor. What pulls the governor closed when first starting
> the Onan? Have tried different settings on the spring and adjusting nut to
> no
>> use.
>> --
>> Bruce Hart
>> 1976 Palm Beach
>> Milliken, Co
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337168 is a reply to message #337167] |
Fri, 21 September 2018 20:53 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Should have 13.5 if it has not been running for some time.
Clean the points.
Spray starter fluid .
Plug gap .020
On Fri, Sep 21, 2018 at 11:32 AM Bruce Hart wrote:
> Have 12.4 volts
>
> On Fri, Sep 21, 2018 at 7:15 AM Jim Kanomata
> wrote:
>
>> Make sure you have full 12 voltage .
>> Choke comes on only for short instant during cranking then governor opens
>> it up when it starts running.
>>
>>
>> Sent from my iPhone
>>
>>> On Sep 21, 2018, at 6:34 AM, Bruce Hart wrote:
>>>
>>> Trying to get a 4k Onan to run. Onan had been idle for12 years or
>> longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and
>> lubed
>>> starter, lubed starter solenoid, points at .020". Have spark to both
>> plugs. I can get the Onan to run when cranking starter but I have to
>> manually
>>> close the governor. What pulls the governor closed when first starting
>> the Onan? Have tried different settings on the spring and adjusting nut
> to
>> no
>>> use.
>>> --
>>> Bruce Hart
>>> 1976 Palm Beach
>>> Milliken, Co
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337170 is a reply to message #337168] |
Fri, 21 September 2018 21:56 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
Not sure how you get 13.5 volts from 12 volt battery. Unless that is what
it should be charging rate when the generator is running.
On Fri, Sep 21, 2018 at 7:54 PM Jim Kanomata wrote:
> Should have 13.5 if it has not been running for some time.
> Clean the points.
> Spray starter fluid .
> Plug gap .020
>
> On Fri, Sep 21, 2018 at 11:32 AM Bruce Hart wrote:
>
>> Have 12.4 volts
>>
>> On Fri, Sep 21, 2018 at 7:15 AM Jim Kanomata
>> wrote:
>>
>>> Make sure you have full 12 voltage .
>>> Choke comes on only for short instant during cranking then governor
> opens
>>> it up when it starts running.
>>>
>>>
>>> Sent from my iPhone
>>>
>>>> On Sep 21, 2018, at 6:34 AM, Bruce Hart wrote:
>>>>
>>>> Trying to get a 4k Onan to run. Onan had been idle for12 years or
>>> longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned,
> and
>>> lubed
>>>> starter, lubed starter solenoid, points at .020". Have spark to both
>>> plugs. I can get the Onan to run when cranking starter but I have to
>>> manually
>>>> close the governor. What pulls the governor closed when first
> starting
>>> the Onan? Have tried different settings on the spring and adjusting
> nut
>> to
>>> no
>>>> use.
>>>> --
>>>> Bruce Hart
>>>> 1976 Palm Beach
>>>> Milliken, Co
>>>>
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>> Bruce Hart
>> 1976 Palm Beach
>> Milliken, Co
>> GMC=Got More Class
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337179 is a reply to message #337160] |
Sat, 22 September 2018 09:39 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
|
Senior Member |
|
|
Check the ground. Rust is the problem.
Gary Kosier
77PB w/500Cad
Newark, Ohio
--------------------------------------------------
From: "Jim Kanomata"
Sent: Friday, September 21, 2018 8:54 AM
To:
Subject: Re: [GMCnet] 4k Onan won't start
> Make sure you have full 12 voltage .
> Choke comes on only for short instant during cranking then governor opens
> it up when it starts running.
>
>
> Sent from my iPhone
>
>> On Sep 21, 2018, at 6:34 AM, Bruce Hart wrote:
>>
>> Trying to get a 4k Onan to run. Onan had been idle for12 years or longer.
>> Replaced the fuel pump, k-1 solenoid, control board, cleaned, and lubed
>> starter, lubed starter solenoid, points at .020". Have spark to both
>> plugs. I can get the Onan to run when cranking starter but I have to
>> manually
>> close the governor. What pulls the governor closed when first starting
>> the Onan? Have tried different settings on the spring and adjusting nut
>> to no
>> use.
>> --
>> Bruce Hart
>> 1976 Palm Beach
>> Milliken, Co
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: 4k Onan won't start [message #337184 is a reply to message #337158] |
Sat, 22 September 2018 20:52 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
You note fire at both plugs. Then it gets no gas, which would include a bad choke. Investigate more. Will it sputter if you prime it with some gas?
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337186 is a reply to message #337184] |
Sun, 23 September 2018 06:11 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
It gets gas, has spark. It will start and keep running when I manually
close the governor . Without helping the governor it just continues to
crank and the governor won't close.
I am helping a friend go through his newly acquired 23 foot Canyonland and
won't get back to it until next week..
On Sat, Sep 22, 2018 at 8:02 PM Johnny Bridges via Gmclist <
gmclist@list.gmcnet.org> wrote:
> You note fire at both plugs. Then it gets no gas, which would include a
> bad choke. Investigate more. Will it sputter if you prime it with some
> gas?
>
> --johnny
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: 4k Onan won't start [message #337188 is a reply to message #337158] |
Sun, 23 September 2018 06:40 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
I'm missing something - gov 'won't close'? Do you mean the engine doesn't throttle back as it achieves goverened speed?
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: 4k Onan won't start [message #337190 is a reply to message #337158] |
Sun, 23 September 2018 07:19 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
|
Senior Member |
|
|
Bruce Hart wrote on Fri, 21 September 2018 06:34Trying to get a 4k Onan to run. Onan had been idle for12 years or longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and lubed starter, lubed starter solenoid, points at .020". Have spark to both plugs. I can get the Onan to run when cranking starter but I have to manually close the governor. What pulls the governor closed when first starting the Onan? Have tried different settings on the spring and adjusting nut to no use.
I'm confused. You say "governor" but seem to be describing the choke operation. The governor controls the throttle linkage. If it is truly the governor then it is a much different problem to solve. The Governor, its linkage and the actual internal governor system, should be pulling the throttle open.
The choke, when cold and not running should be approximately 1/2 closed. The choke actuator has two internal components. One is the typical thermal bi metallic spring. When cold this pulls the choke half way closed. The other component is an electric solenoid. This solenoid is energized when the starter cranks and pulls the choke the rest of the way closed. With the starter not running and the engine hot the choke should be completely open.
The choke actuator is grounded through the exhause manifold. This connection frequently is, as stated earlier, rusted and will not allow the current to flow. You can clean the rust however it will rust again and cause the same problem. Best solution is to run a ground wire from the choke actuator mounting bolt to a better ground. If the choke actuator solenoid does not work all is not lost as there are some fixes that may work to correct this. I don't believe there is a choke actuator replacement available. (I replaced mine with a NOS OEM but it was pricey. I got lucky and saw it on eBay as soon as it was posted and did the "buy it now" thing.)
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337194 is a reply to message #337190] |
Sun, 23 September 2018 08:26 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
Yes it is the governor. At stop position the governor butterfly is wide
open, when Onan is running the governor butterfly is mostly closed and
positioned against a stop, adjustable by an idle screw.
On Sun, Sep 23, 2018 at 6:20 AM Steve Southworth
wrote:
> Bruce Hart wrote on Fri, 21 September 2018 06:34
>> Trying to get a 4k Onan to run. Onan had been idle for12 years or
> longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and
> lubed
>> starter, lubed starter solenoid, points at .020". Have spark to both
> plugs. I can get the Onan to run when cranking starter but I have to
> manually
>> close the governor. What pulls the governor closed when first starting
> the Onan? Have tried different settings on the spring and adjusting nut to
>> no use.
>
>
>
> I'm confused. You say "governor" but seem to be describing the choke
> operation. The governor controls the throttle linkage. If it is truly the
> governor then it is a much different problem to solve. The Governor, its
> linkage and the actual internal governor system, should be pulling the
> throttle open.
>
> The choke, when cold and not running should be approximately 1/2 closed.
> The choke actuator has two internal components. One is the typical thermal
> bi metallic spring. When cold this pulls the choke half way closed. The
> other component is an electric solenoid. This solenoid is energized when
> the starter cranks and pulls the choke the rest of the way closed. With
> the starter not running and the engine hot the choke should be completely
> open.
>
> The choke actuator is grounded through the exhause manifold. This
> connection frequently is, as stated earlier, rusted and will not allow the
> current
> to flow. You can clean the rust however it will rust again and cause the
> same problem. Best solution is to run a ground wire from the choke actuator
> mounting bolt to a better ground. If the choke actuator solenoid does not
> work all is not lost as there are some fixes that may work to correct this.
> I don't believe there is a choke actuator replacement available. (I
> replaced mine with a NOS OEM but it was pricey. I got lucky and saw it on
> eBay
> as soon as it was posted and did the "buy it now" thing.)
>
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #337202 is a reply to message #337194] |
Sun, 23 September 2018 11:59 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Governors operate in a state of balance, like a teeter totter. Mechanical
force from a centrifugal device driven by the running engine vs a spring.
When the engine is not running, the spring overwhelms the linkage, and the
throttle appears to be wide open, or in some cases, fully closed. BUT, when
the engine runs, the linkage moves the throttle to a pre-determined
position to control the voltage, AS WELL AS THE FREQUENCY, of the
generator. If you grab hold of the linkage and pull against the effort of
the governor, bad stuff is going to happen if the generator is actively
producing electricity. Some modern electronic devices really, really don't
like excessive voltage or frequency. You will let the captive smoke out of
them, and they will cease functioning. Just sayin'.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Sun, Sep 23, 2018, 6:27 AM Bruce Hart wrote:
> Yes it is the governor. At stop position the governor butterfly is wide
> open, when Onan is running the governor butterfly is mostly closed and
> positioned against a stop, adjustable by an idle screw.
>
> On Sun, Sep 23, 2018 at 6:20 AM Steve Southworth
> wrote:
>
>> Bruce Hart wrote on Fri, 21 September 2018 06:34
>>> Trying to get a 4k Onan to run. Onan had been idle for12 years or
>> longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned, and
>> lubed
>>> starter, lubed starter solenoid, points at .020". Have spark to both
>> plugs. I can get the Onan to run when cranking starter but I have to
>> manually
>>> close the governor. What pulls the governor closed when first starting
>> the Onan? Have tried different settings on the spring and adjusting nut
> to
>>> no use.
>>
>>
>>
>> I'm confused. You say "governor" but seem to be describing the choke
>> operation. The governor controls the throttle linkage. If it is truly
> the
>> governor then it is a much different problem to solve. The Governor, its
>> linkage and the actual internal governor system, should be pulling the
>> throttle open.
>>
>> The choke, when cold and not running should be approximately 1/2 closed.
>> The choke actuator has two internal components. One is the typical
> thermal
>> bi metallic spring. When cold this pulls the choke half way closed. The
>> other component is an electric solenoid. This solenoid is energized when
>> the starter cranks and pulls the choke the rest of the way closed. With
>> the starter not running and the engine hot the choke should be completely
>> open.
>>
>> The choke actuator is grounded through the exhause manifold. This
>> connection frequently is, as stated earlier, rusted and will not allow
> the
>> current
>> to flow. You can clean the rust however it will rust again and cause the
>> same problem. Best solution is to run a ground wire from the choke
> actuator
>> mounting bolt to a better ground. If the choke actuator solenoid does
> not
>> work all is not lost as there are some fixes that may work to correct
> this.
>> I don't believe there is a choke actuator replacement available. (I
>> replaced mine with a NOS OEM but it was pricey. I got lucky and saw it
> on
>> eBay
>> as soon as it was posted and did the "buy it now" thing.)
>>
>> --
>> Steve Southworth
>> 1974 Glacier TZE064V100150 (for workin on)
>> 1975 Transmode TZE365V100394 (parts & spares)
>> Palmyra WI
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
> --
> Bruce Hart
> 1976 Palm Beach
> Milliken, Co
> GMC=Got More Class
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #338112 is a reply to message #337202] |
Wed, 24 October 2018 22:45 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Locate the main fuel setting and close it gently , then back ot 3 1/2 turn.
On Sun, Sep 23, 2018 at 9:58 AM James Hupy wrote:
> Governors operate in a state of balance, like a teeter totter. Mechanical
> force from a centrifugal device driven by the running engine vs a spring.
> When the engine is not running, the spring overwhelms the linkage, and the
> throttle appears to be wide open, or in some cases, fully closed. BUT, when
> the engine runs, the linkage moves the throttle to a pre-determined
> position to control the voltage, AS WELL AS THE FREQUENCY, of the
> generator. If you grab hold of the linkage and pull against the effort of
> the governor, bad stuff is going to happen if the generator is actively
> producing electricity. Some modern electronic devices really, really don't
> like excessive voltage or frequency. You will let the captive smoke out of
> them, and they will cease functioning. Just sayin'.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Sun, Sep 23, 2018, 6:27 AM Bruce Hart wrote:
>
>> Yes it is the governor. At stop position the governor butterfly is wide
>> open, when Onan is running the governor butterfly is mostly closed and
>> positioned against a stop, adjustable by an idle screw.
>>
>> On Sun, Sep 23, 2018 at 6:20 AM Steve Southworth
>> wrote:
>>
>>> Bruce Hart wrote on Fri, 21 September 2018 06:34
>>>> Trying to get a 4k Onan to run. Onan had been idle for12 years or
>>> longer. Replaced the fuel pump, k-1 solenoid, control board, cleaned,
> and
>>> lubed
>>>> starter, lubed starter solenoid, points at .020". Have spark to both
>>> plugs. I can get the Onan to run when cranking starter but I have to
>>> manually
>>>> close the governor. What pulls the governor closed when first
> starting
>>> the Onan? Have tried different settings on the spring and adjusting
> nut
>> to
>>>> no use.
>>>
>>>
>>>
>>> I'm confused. You say "governor" but seem to be describing the choke
>>> operation. The governor controls the throttle linkage. If it is truly
>> the
>>> governor then it is a much different problem to solve. The Governor,
> its
>>> linkage and the actual internal governor system, should be pulling the
>>> throttle open.
>>>
>>> The choke, when cold and not running should be approximately 1/2
> closed.
>>> The choke actuator has two internal components. One is the typical
>> thermal
>>> bi metallic spring. When cold this pulls the choke half way closed.
> The
>>> other component is an electric solenoid. This solenoid is energized
> when
>>> the starter cranks and pulls the choke the rest of the way closed.
> With
>>> the starter not running and the engine hot the choke should be
> completely
>>> open.
>>>
>>> The choke actuator is grounded through the exhause manifold. This
>>> connection frequently is, as stated earlier, rusted and will not allow
>> the
>>> current
>>> to flow. You can clean the rust however it will rust again and cause
> the
>>> same problem. Best solution is to run a ground wire from the choke
>> actuator
>>> mounting bolt to a better ground. If the choke actuator solenoid does
>> not
>>> work all is not lost as there are some fixes that may work to correct
>> this.
>>> I don't believe there is a choke actuator replacement available. (I
>>> replaced mine with a NOS OEM but it was pricey. I got lucky and saw it
>> on
>>> eBay
>>> as soon as it was posted and did the "buy it now" thing.)
>>>
>>> --
>>> Steve Southworth
>>> 1974 Glacier TZE064V100150 (for workin on)
>>> 1975 Transmode TZE365V100394 (parts & spares)
>>> Palmyra WI
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>> --
>> Bruce Hart
>> 1976 Palm Beach
>> Milliken, Co
>> GMC=Got More Class
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: 4k Onan won't start [message #338125 is a reply to message #337158] |
Thu, 25 October 2018 21:47 |
Melbo
Messages: 144
Registered: August 2018
Location: Albuquerque NM
Karma: 0
|
Senior Member |
|
|
When I started my 6K onan that had been sleeping for 12 years I pushed the start switch and it acted like it wanted to start but when I let go it sputtered and would not keep running. I used a jumper from the positive side of the battery to the positive side of the coil and it kept running. I only had to do it for a couple of seconds. I'm not sure what caused that but then the motor kept running and I got to see if it was producing electricity. I am on to getting it a good fuel supply now BUT I thought I would pass on what worked for me.
HTH
Melbo
Albuquerque NM Bus Conversion 1978 MCI 1973 GMC
|
|
|
|
| Re: [GMCnet] 4k Onan won't start [message #338126 is a reply to message #338125] |
Thu, 25 October 2018 22:25 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
If you do not have 13.5 volt it will die.
Some of us have diconected the alternator on the generator as it is known
to produce problems.
On Thu, Oct 25, 2018 at 8:12 PM wrote:
> When I started my 6K onan that had been sleeping for 12 years I pushed the
> start switch and it acted like it wanted to start but when I let go it
> sputtered and would not keep running. I used a jumper from the positive
> side of the battery to the positive side of the coil and it kept running. I
> only had to do it for a couple of seconds. I'm not sure what caused that
> but then the motor kept running and I got to see if it was producing
> electricity. I am on to getting it a good fuel supply now BUT I thought I
> would pass on what worked for me.
>
> HTH
>
> Melbo
> --
> Albuquerque NM Bus Conversion 1978 MCI 1973 GMC
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
Goto Forum:
Current Time: Thu Mar 27 17:39:12 CDT 2025
Total time taken to generate the page: 0.01218 seconds
|
GMCforum
Search
Help
Register
Login
Home
