Carb power piston spring [message #334281] |
Sat, 30 June 2018 21:07 |
C Boyd
Messages: 2629 Registered: April 2006
Karma: 18
|
Senior Member |
|
|
I am having trouble finding the OEM power piston spring hg for the mh. I believe it is light, around 3 hg? The Edelbrock replacement carb I am running starts and drives good but suffers from a very black tail pipe and 8 mpg. It has 5"hg springs in it and I am thinking it is going rich under cruise conditions. Anyone have any ideas or suggestions?
C. Boyd
76 Crestmont
East Tennessee
|
|
|
|
Re: Carb power piston spring [message #334375 is a reply to message #334281] |
Sun, 01 July 2018 20:12 |
Ken Burton
Messages: 10030 Registered: January 2004 Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
If I remember correctly Larry Weidner researched and ordered a bunch of them a little over 10 years ago. Try calling Larry to see if my memory is correct.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
|
|
|
[GMCnet] Re: Carb [message #367914 is a reply to message #334281] |
Thu, 09 December 2021 18:12 |
jimk
Messages: 6734 Registered: July 2006 Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Set the timing back to 10-12 degrees and SLOW the Idle to 700RPM
On Thu, Dec 9, 2021 at 4:03 PM Hanson Email wrote:
> Working on a coach , 455 newly overhauled, approx 1000 miles, owner
> complained of dieseling when shutting off and low power at altitudes. We
> had
> the carb overhauled by shop that knows what he is doing, but overhauls what
> is there. The carb is the wrong number and has been modified to fit. And
> all
> ports are direct vacuum. Mostly does not diesel when vacuum removed from
> distributor. When we retard timing back from 9 degrees, it doesn't want to
> "rev" up. Also having trouble getting the motor to warm up even tho I put
> in
> a 195 thermostat. Chasing my tail here.
>
> Any thoughts would be appreciated.
>
> Dean hanson
>
> Fremont.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
[GMCnet] Re: Carb [message #367916 is a reply to message #334281] |
Thu, 09 December 2021 18:14 |
jimk
Messages: 6734 Registered: July 2006 Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Also check the distributor mechanical is free and not binding or
dragging and the throttle vac port is hooked to the distributor.
On Thu, Dec 9, 2021 at 4:12 PM Jim Kanomata wrote:
> Set the timing back to 10-12 degrees and SLOW the Idle to 700RPM
>
> On Thu, Dec 9, 2021 at 4:03 PM Hanson Email wrote:
>
>> Working on a coach , 455 newly overhauled, approx 1000 miles, owner
>> complained of dieseling when shutting off and low power at altitudes. We
>> had
>> the carb overhauled by shop that knows what he is doing, but overhauls
>> what
>> is there. The carb is the wrong number and has been modified to fit. And
>> all
>> ports are direct vacuum. Mostly does not diesel when vacuum removed from
>> distributor. When we retard timing back from 9 degrees, it doesn't want to
>> "rev" up. Also having trouble getting the motor to warm up even tho I put
>> in
>> a 195 thermostat. Chasing my tail here.
>>
>> Any thoughts would be appreciated.
>>
>> Dean hanson
>>
>> Fremont.
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>>
>
>
> --
> Jim Kanomata ASE
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.gmcrvparts.com
> 1-800-752-7502
>
--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|