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Post Info TOPIC: 283 2 barrel ( 2GC ) accelerator pump question


A Poncho Legend!

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283 2 barrel ( 2GC ) accelerator pump question


Does anyone have experience with replacing an accelerator pump on a 2 barrel 283? I'm reading it is very important that it's ethanol resistant. I'm guessing that is the why the one on this 283 is dead. It dies right out when you try to rev it up any little bit. I found a guy on ebay selling pumps that he says are ethanol resistant. 



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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Rochester?


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Canadian Poncho Superstar!

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I think if it squirts gas into the carb it should be OK. Maybe just dried out? On my 2GC carb (that I have since replaced) I think it was the original and it worked fine although it has to be said that I tried to run only Shell fuel that had no ethanol (at the time.)

Best to get an ethanol resistant one as it's hard to find fuel without it these days.

Is the the nice low mileage 283 that came from your Strato?



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ken from northern Alberta

38 Willys pickup electric

39 Buick (327 with 700 r4)

66 Beaumont 4 door hardtop

69 Chevy CST pickup

1976 GMC 23'  motorhome

1994 Impala SS (temporary, according to my wife)



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LT1Caddy wrote:


Rochester?


 Yes, 2GC is the original Rochester on a 283.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



A Poncho Legend!

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66 Grande guy wrote:

I think if it squirts gas into the carb it should be OK. Maybe just dried out? On my 2GC carb (that I have since replaced) I think it was the original and it worked fine although it has to be said that I tried to run only Shell fuel that had no ethanol (at the time.)

Best to get an ethanol resistant one as it's hard to find fuel without it these days.

Is the the nice low mileage 283 that came from your Strato?


 No, this actually a 4 door hardtop Beaumont with even lower miles than my car, it has about 42,000!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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Oh my I think I have seen pictures of that and it is such a beauty. Of course, they all are!

Don't get power-crazy and put a 4 barrel on it!  They run just great with the 2 barrel.



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ken from northern Alberta

38 Willys pickup electric

39 Buick (327 with 700 r4)

66 Beaumont 4 door hardtop

69 Chevy CST pickup

1976 GMC 23'  motorhome

1994 Impala SS (temporary, according to my wife)



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There is no plan to convert it to a 4 barrel Ken, no worries!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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See if you can find a leather pump, they are ethanol resistant. NAPA used to list them, dont know if they still do or not- I have only worked on the 4gc though. Jon at The Carburetor Shop in Missouri makes his own leather pumps but only sells them in kits. He makes up his own kits, they are the best, he will only sell you a kit if you supply the original tag number. They are not cheap but they are specific to each carb. Check his website.

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic



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Ive got a bunch of leather ones you can try one out.

Also look up Walker 15289C  carb kit on rock auto,  its got the blue ethanol pump and the best gasket selection



-- Edited by beaumontguru on Thursday 12th of January 2023 09:38:10 AM

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Beaumontguru

MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH.  The other one has a longer roof.



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Carl.. I have this carb on my 87 Thundercraft. I bought it off the neighbor, mint condition when I moved to the lake. He had spent lots of $$ at the getting it to run properly.
I had a similar problem that you are talking about. The 2 barrel is super ez to work on. If you have had any carb apart, then you will not have a problem with this one. I run 91/94 octane and have had no problems for 3 years. I do remember that the pump was blue on mine, but I changed it to the one in the overhaul kit.
What I found was the spring collar that holds the pump umbrella on had moved and the umbrella would move up and down by itself.
If you just started the boat and idled away and down the lake, no problem. But if you jammed the throttle open, it would accelerate and then fall flat on its nose. Took me a long time to find this.
When you installed the pump, lube it first with WD40, don't put it in dry, pump it up and down a few times to make sure....
I was not aware that the blue pump was anything special...

HTH..

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A Poncho Legend!

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beaumontguru wrote:

Ive got a bunch of leather ones you can try one out.

Also look up Walker 15289C  carb kit on rock auto,  its got the blue ethanol pump and the best gasket selection




 Ok great. I may be in touch for a pump. I saw that kit and was worried because it didn't look like a blue pump in the pictures although it is a bit tough to tell. Thanks!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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LT1Caddy wrote:


Carl.. I have this carb on my 87 Thundercraft. I bought it off the neighbor, mint condition when I moved to the lake. He had spent lots of $$ at the getting it to run properly.
I had a similar problem that you are talking about. The 2 barrel is super ez to work on. If you have had any carb apart, then you will not have a problem with this one. I run 91/94 octane and have had no problems for 3 years. I do remember that the pump was blue on mine, but I changed it to the one in the overhaul kit.
What I found was the spring collar that holds the pump umbrella on had moved and the umbrella would move up and down by itself.
If you just started the boat and idled away and down the lake, no problem. But if you jammed the throttle open, it would accelerate and then fall flat on its nose. Took me a long time to find this.
When you installed the pump, lube it first with WD40, don't put it in dry, pump it up and down a few times to make sure....
I was not aware that the blue pump was anything special...

HTH..


 Thanks, I may get one and try it. Right now it stalls when there's any attempt to speed up the engine, even in park.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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That number has the blue pump. There is also an airtex number I cant remember exactly the part number but it is something like 1136g. Or atleast has those numbers

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Beaumontguru

MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH.  The other one has a longer roof.



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HI CARL,

I HAVE NO LUCK WITH THE THE BLUE ONES.

CARB REPAIR SHOP T OLD THEY ARE GOOD TO 20% ETHONOL., HAD ONE IN A 62 PONTIAC 6 CYL.

REPLAED IT TWICE. WORKED GREAT WHEN INSTALLED, BOTH PUMPS SWELLED UP AFTER ABOUT 3 DAYS IN THE CARB

SAME TROUBLE WITH A 64 4GC CARB,

AND ONE PULLED RIGHT OFF AS IT SWELLED TO LARGE TO RUN IN THE BORE.

LEATHER IS THE ONLY WAY TO GO.

HARD TO FIND, YES I KNOW.

IF YOUR OLD CARB HAS ONE IN IT, OFTEN  YOU CAN SOAK IT IN GAS WITH A LITTLE OIL TO SOFTEN IT UP.

AS LONG AS IT IS TO FAR GONE.

 

 



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I came here to post, all excited because I bought a 212D Hygrade kit this afternoon and it has a blue pump in it. Now I'm not sure what to do. Shoot!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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Just a thought... If you bought a carb kit today, there has to be good chance that the manufacturer (Hygrade) has used a product that WILL be ethanol resistant. What other gas can you buy now at the local station? They ALL have a percentage of ethanol and there were no 11:1 compression cars running 2 barrels....
Something to think about and maybe puts it all in to perspective.

I rest my case.....LOL

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Oh ya,  the 212D,  thats the one!  just use it, the blue pump will be fine.   but try cleaning the bore really well with scotchbrite,  sometimes they get a worn spot or a ridge that makes the rubber stick,  i think that is the cause of most peoples problems with the rubber coming off.  and oil it good when installing



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Beaumontguru

MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH.  The other one has a longer roof.



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Oh excellent, thanks for the tips. I won't likely have time to work on it now until Monday but here's hoping this will cure it. 



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



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Update on this. I took the Rochester 2 barrel off the 283 apart last night and this is exactly the accelerator pump that greeted me. Ethanol victim? Or what causes this?

20230203_213548[1].jpg

 



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars



Canadian Poncho Superstar!

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Id say cheap quality part,  or(more plausible):  it got gummed up and stuck in the bore from sitting too long, then stepping on the gas and tore it off.



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Beaumontguru

MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH.  The other one has a longer roof.



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I was wondering about leather seals, plungers, pumps, whatever you want to call them. The old Rochester B-series 1-barrels use leather pumps and I wondered if they get damaged by ethanol, which I avoid. The sixes ran them through '67.

A while back I picked up leather seals for my old 1950 Johnson 5-horse. It leaks out the carb without it when I primed. They are supposed to be there but were near impossible to find. An old guy in the U.S. named Lloyd Lautner did them by hand, took orders in cash only, by mail with SSAE (which is fun to buy U.S. postage when in Canada).

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I just rebuilt my Rochester 2-Jet 2G last weekend. Bought the rebuild kit from The Carburetor Doctor, and it's Ethanol compatible.

https://carburetor.ca/kits/ck0022.html

 

2G-Rebuild1.jpg

2G-Rebuild2.jpg



-- Edited by ZigZag on Saturday 4th of February 2023 07:25:45 AM

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My 64 Safari build



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They all say they are ethanol compatible but Ive used leather for 20 years now, but also avoid ethanol. That may work fine but if you have any problem in future, thats what I would look at first.

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic

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