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#421915 06/10/2008 10:26 PM
Joined: Dec 2004
Posts: 322
B
'Bolter
'Bolter
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Joined: Dec 2004
Posts: 322
A couple of years ago I bought a rebuilt Carter YF 2100S and put it on my stock '57 235. It must have been an older rebuild as I had to replace the gaskets due to a little leak. All has been good until recently. When starting cold in the morning I used to be able to choke and the engine started easily and warmed up fine. Now I can only choke a little and then I have to close the choke or else it runs way too rich and rough. I have also gotten a couple of backfires after slowing for a stop sign and then trying to take off....only one little pop and then it's fine. Gas mileage is also starting to decrease as well.

What do you think....time to rebuild?

Chuck


Blue 50

1950 3100 w/57 235
Patrick’s Saginaw 4 speed and 3:55 rear end
Joined: May 2004
Posts: 45
E
New Guy
New Guy
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Joined: May 2004
Posts: 45
Originally Posted by Blue 50
What do you think....time to rebuild?

Maybe, but I'd want to rule out ignition first(especially dwell) if it were mine.


Ed Fallon
In seemlingily endless process of restoring a stock 1953 chev 3100 pickup.
Joined: Oct 2001
Posts: 3,458
4
Extreme Gabster
Extreme Gabster
4 Offline
Joined: Oct 2001
Posts: 3,458
The YF has a diaphragm accelerator pump. With the inclusion of alcohol in today's fuel, it tends to spring a leak internally after a while, I bet if you take it apart you will find a tear in the diaphragm.


Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic.
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Posts: 2,715
C
Carburetion specialist
Carburetion specialist
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Posts: 2,715
4onthefloor is right about the diaphragm and they do give problems when used with deathanol; however, as Ed suggested, I would check the ignition first.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop
Joined: Dec 2004
Posts: 322
B
'Bolter
'Bolter
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Joined: Dec 2004
Posts: 322
Thanks for the info. I have been running a pertronix in my stock distributor for awhile...wouldn't the dwell only be a problem with points?

Nothing but deathanol in these parts so I will take a look at the diaphram.


Blue 50

1950 3100 w/57 235
Patrick’s Saginaw 4 speed and 3:55 rear end
Joined: Nov 2002
Posts: 2,715
C
Carburetion specialist
Carburetion specialist
C Offline
Joined: Nov 2002
Posts: 2,715
Others make take a different view, but I would suggest re-installing a set of points and condenser to see if your problem disappears.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop

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