GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.
Home » Public Forums » GMCnet » Battery Boost Solenoid # (GMCMI Has it Wrong!)
Battery Boost Solenoid # [message #110859] Tue, 04 January 2011 22:58 Go to next message
LEdmcconnell is currently offline  LEdmcconnell   United States
Messages: 12
Registered: November 2004
Location: Bridgeton, MO
Karma: 0
Junior Member
Does anyone know the correct part number for the battery boost solenoid? The GMCMI Parts Interchange (Issue 91, page4)list it as NAPA ECH ST247, but my auto parts man & the NAPA web site show it as:

http://www.napaonline.com/Search/Detail.aspx?R=ECHST247_0169976288


This is what I'm looking for:

http://www.gmcws.org/Tech/BOOST_SWITCH_GMCWS.pdf

The one that I'm replacing is different yet. It has all 4
terminals on the end.

My "new" coach is an early model 1976 Birchaven titled as
a '77.

Luther McConnell
'76 Birchaven
Bridgeton, MO

Report message to a moderator

Re: [GMCnet] Battery Boost Solenoid # [message #110862 is a reply to message #110859] Tue, 04 January 2011 23:39 Go to previous messageGo to next message
powerjon is currently offline  powerjon   United States
Messages: 2446
Registered: January 2004
Karma: 5
Senior Member
You want the Napa ST80SB or ST80 solenoid switch as a replacement.
The part you listed (ST247) is a starter solenoid and not what you want.

JR Wright

On Jan 4, 2011, at 11:58 PM, LEdmcconnell wrote:

>
>
> Does anyone know the correct part number for the battery boost
> solenoid? The GMCMI Parts Interchange (Issue 91, page4)list it as
> NAPA ECH ST247, but my auto parts man & the NAPA web site show it as:
>
> http://www.napaonline.com/Search/Detail.aspx?R=ECHST247_0169976288
>
>
> This is what I'm looking for:
>
> http://www.gmcws.org/Tech/BOOST_SWITCH_GMCWS.pdf
>
> The one that I'm replacing is different yet. It has all 4
> terminals on the end.
>
> My "new" coach is an early model 1976 Birchaven titled as
> a '77.
>
>
> --
> Luther McConnell
> '77 Birchaven
> Bridgeton, MO
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan

Report message to a moderator

Re: [GMCnet] Battery Boost Solenoid # [message #110895 is a reply to message #110859] Wed, 05 January 2011 08:06 Go to previous messageGo to next message
Richard Denney is currently offline  Richard Denney   United States
Messages: 920
Registered: April 2010
Karma: 9
Senior Member
On Tue, Jan 4, 2011 at 11:58 PM, LEdmcconnell <LEdmcconnell@aol.com> wrote:

> The one that I'm replacing is different yet. It has all 4
> terminals on the end.
>

This is a common configuration for high-amperage contactors that would work
fine in this situation. Yandina sold off some surplus 200-amp contactors a
few years ago, and I managed to snag one of them for really cheap. It has a
much higher continuous current rating than a typical solenoid, and it also
had the required 100% duty cycle. Here's a picture of mine:

http://www.gmcmhphotos.com/photos/showphoto.php?photo=26980&title=chassic-wiring-center-2c&cat=3677

Any solenoid relay switch or contactor will work. It needs a 12-volt control
circuit (case ground is acceptable), a current rating sufficient for engine
starting (the crank rating of the battery for a few seconds), and a 100%
duty cycle rating. Most starter solenoids are fine except they have a 25%
duty cycle rating and their coils will overheat if left energized.

Rick "who has never actually needed a boost since owning the coach" Denney

--
'73 230 "Jaws"
Northern Virginia
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Report message to a moderator

Re: [GMCnet] Battery Boost Solenoid # [message #110929 is a reply to message #110895] Wed, 05 January 2011 13:51 Go to previous messageGo to next message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
""Rick "who has never actually needed a boost since owning the coach" Denney
""

Will the redhead confirm that?

Bob de Kruyff
78 Eleganza
Chandler, AZ

Report message to a moderator

Re: [GMCnet] Battery Boost Solenoid # [message #110936 is a reply to message #110929] Wed, 05 January 2011 16:05 Go to previous messageGo to next message
Richard Denney is currently offline  Richard Denney   United States
Messages: 920
Registered: April 2010
Karma: 9
Senior Member
On Wed, Jan 5, 2011 at 2:51 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:

>
>
> ""Rick "who has never actually needed a boost since owning the coach"
> Denney
> ""
>
> Will the redhead confirm that?
>

Okay, okay, okay, smarty-pants.

Rick "who has never actually needed a BATTERY boost since owning the coach"
Denney

--
'73 230 "Jaws"
Northern Virginia
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Report message to a moderator

Re: [GMCnet] Battery Boost Solenoid # [message #110943 is a reply to message #110936] Wed, 05 January 2011 16:48 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
Senior Member
I have an old one that I took from our GMC due to some messed up threads. My plan is to rethread it and use as a hidden shutoff to keep GMCers from stealing my bug at rallies.
dan

3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer

Report message to a moderator

Re: [GMCnet] Battery Boost Solenoid # [message #111000 is a reply to message #110862] Wed, 05 January 2011 22:41 Go to previous message
jimk is currently offline  jimk   United States
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
Senior Member
On Tue, Jan 4, 2011 at 9:39 PM, John Wright <powerjon@chartermi.net> wrote:
> You want the Napa ST80SB or ST80 solenoid switch as a replacement.
> The part you listed (ST247) is a starter solenoid and not what you want.
>
> JR Wright
>
> On Jan 4, 2011, at 11:58 PM, LEdmcconnell wrote:
>
>>
>>
>> Does anyone know the correct part number for the battery boost
>> solenoid?  The GMCMI Parts Interchange (Issue 91, page4)list it as
>> NAPA ECH ST247, but my auto parts man & the NAPA web site show it as:
>>
>> http://www.napaonline.com/Search/Detail.aspx?R=ECHST247_0169976288
>>
>>
>> This is what I'm looking for:
>>
>> http://www.gmcws.org/Tech/BOOST_SWITCH_GMCWS.pdf
>>
>> The one that I'm replacing is different yet.  It has all 4
>> terminals on the end.
>>
>> My "new" coach is an early model 1976 Birchaven titled as
>> a '77.
>>
>>
>> --
>> Luther McConnell
>> '77 Birchaven
>> Bridgeton, MO
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502

Report message to a moderator

Previous Topic: New album on the GMC Photo Site
Next Topic: Mid winter rummage
Goto Forum:
  


Current Time: Fri Jun 28 06:19:30 CDT 2024

Total time taken to generate the page: 0.01583 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.1.1.
Copyright ©2001-2021 FUDforum Bulletin Board Software