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Pages: (2) [1] 2  ( Go to first unread post )

 yf 938 carb - s sa sb sc sd, which is it
yjcanibul
Posted: Oct 15 2010, 11:19 PM


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Group: Members
Posts: 856
Member No.: 118
Joined: 16-November 08



read 3b page, but how do you know which carb
you actually have installed - is it stamped or a tag ?


--------------------
57 3B : big speedo / Hurricane / YF 938 SD / IAY-4012 / T90 / D18 / 5.375 final drive / open diffs / Firestone 6ply Military NDCC / 12v Delco SI alt / Kayline Top / venting windshield / tub patched / "still fixing leaks one at a time"

89 wrangler : h/duty axles + 5spd / 200+hp 4.2L / arb locked / multiport fuel inj / warn hubs+winch / 1/4 mil km / fishing+trail riding / gets me to work
Top
oldtime
Posted: Oct 16 2010, 10:03 AM


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CARTER YF IDENTIFICATION

Specific YF numberical identification is stamped sideways upon a thin reinforcing web at side of the fuel well body.

Upon external obsevation of the Carter model YF you will note that it can be roughly divided into 3 sections.
1) The bottom cast iron (generally) section is termed the throttle body or the body flange.
This consists of the throttle bore and the throttle vavle.
This section mainly controls the air velocity and manifold vacuum.
2) The middle section is termed the fuel well body and mainly controls the fuel metering.
3) The upper section of the YF is termed the air horn assembly which mainly provides the air intake and fuel inlet.
It also provides choke function.



--------------------
1953 TRANS-VINTAGE CJ-3B / AC 4693 fuel pump / YF 938 SD / Hurricane / 9-1/4" Auburn clutch / T90-C / 2.46 ratio D-18 / Warn O.D. / 5.375 final drive / Powr Lok Front + Rear / Dualmatic drive flanges / deluxe Koenig half cab / 12 volt generator
2nd full re-build using the best from all vintages of CJ-3B

1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
Currently serving as my one and only DAILY DRIVER

St Louis
Top
yjcanibul
Posted: Oct 16 2010, 12:04 PM


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Joined: 16-November 08



thanks oldtime - a little varsol scrub and i see 938 SD stamp

a ) should a '57 have originally had the SD - i think it was the last revision model ?
b ) would a old carter SD rebuild kit most likely be correct/best bet for rebuild ?

user posted image


edit : this one

user posted image


--------------------
57 3B : big speedo / Hurricane / YF 938 SD / IAY-4012 / T90 / D18 / 5.375 final drive / open diffs / Firestone 6ply Military NDCC / 12v Delco SI alt / Kayline Top / venting windshield / tub patched / "still fixing leaks one at a time"

89 wrangler : h/duty axles + 5spd / 200+hp 4.2L / arb locked / multiport fuel inj / warn hubs+winch / 1/4 mil km / fishing+trail riding / gets me to work
Top
oldtime
Posted: Oct 16 2010, 04:05 PM


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Randy,
is that your OEM Carter Kit ?
That's an exceptionally nice kit.
You really ought to document all the parts in the kit.

In fact I'll buy it off you and send you a Jeep NOS kit if you don't need all the parts from the OEM Carter kit.

Besides minor metering changes the SC and SD use a pump discharge check needle
as opposed to the S and SA check ball and weight.


--------------------
1953 TRANS-VINTAGE CJ-3B / AC 4693 fuel pump / YF 938 SD / Hurricane / 9-1/4" Auburn clutch / T90-C / 2.46 ratio D-18 / Warn O.D. / 5.375 final drive / Powr Lok Front + Rear / Dualmatic drive flanges / deluxe Koenig half cab / 12 volt generator
2nd full re-build using the best from all vintages of CJ-3B

1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
Currently serving as my one and only DAILY DRIVER

St Louis
Top
yjcanibul
Posted: Oct 16 2010, 06:54 PM


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Group: Members
Posts: 856
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Joined: 16-November 08



the kit is avail from the turkey nos carb vendor as a buy now,
he's got alot of them - picking one up.

figure i will need it - the PO set my idle high (1000rpm on analyzer)
and i am not going to fiddle with it just yet , i ran some
really strong cleaner thru and smoothed out the idle for now

edit: oldtime if you want to see it first hand i can forward it too you
to have a look - will let you know once it arrives


--------------------
57 3B : big speedo / Hurricane / YF 938 SD / IAY-4012 / T90 / D18 / 5.375 final drive / open diffs / Firestone 6ply Military NDCC / 12v Delco SI alt / Kayline Top / venting windshield / tub patched / "still fixing leaks one at a time"

89 wrangler : h/duty axles + 5spd / 200+hp 4.2L / arb locked / multiport fuel inj / warn hubs+winch / 1/4 mil km / fishing+trail riding / gets me to work
Top
oldtime
Posted: Oct 17 2010, 03:06 PM


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Posts: 4,396
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Joined: 12-July 08



Randy,
Thanks for the info.
I had not seen them.
I'll likely buy a kit for myself.

QUOTE
a ) should a '57 have originally had the SD - i think it was the last revision model ?

According to my limited collection of old Carter documents :
The 938 ..S begins 1953
The 938 SA begins 1954
The 938 SC begins xxxx
The 938 SD begins late 1959


--------------------
1953 TRANS-VINTAGE CJ-3B / AC 4693 fuel pump / YF 938 SD / Hurricane / 9-1/4" Auburn clutch / T90-C / 2.46 ratio D-18 / Warn O.D. / 5.375 final drive / Powr Lok Front + Rear / Dualmatic drive flanges / deluxe Koenig half cab / 12 volt generator
2nd full re-build using the best from all vintages of CJ-3B

1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
Currently serving as my one and only DAILY DRIVER

St Louis
Top
yjcanibul
Posted: Oct 27 2010, 07:47 PM


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Group: Members
Posts: 856
Member No.: 118
Joined: 16-November 08



looks like someone swapped the SD onto mine then

they ship fast from turkey - rec'd it already
its kit # 5145X and the instructions are © 1983

it lists willys 4cyl 1950 to 1967 and a few adj settings

is there something in particular i should be looking for ?



--------------------
57 3B : big speedo / Hurricane / YF 938 SD / IAY-4012 / T90 / D18 / 5.375 final drive / open diffs / Firestone 6ply Military NDCC / 12v Delco SI alt / Kayline Top / venting windshield / tub patched / "still fixing leaks one at a time"

89 wrangler : h/duty axles + 5spd / 200+hp 4.2L / arb locked / multiport fuel inj / warn hubs+winch / 1/4 mil km / fishing+trail riding / gets me to work
Top
oldtime
Posted: Oct 27 2010, 07:57 PM


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Posts: 4,396
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Joined: 12-July 08



Randy,
I never found the Carter OEM YF kits on eBay.
You have a link ?

QUOTE
looks like someone swapped the SD onto mine then

Perhaps the original carburetor was changed out.


--------------------
1953 TRANS-VINTAGE CJ-3B / AC 4693 fuel pump / YF 938 SD / Hurricane / 9-1/4" Auburn clutch / T90-C / 2.46 ratio D-18 / Warn O.D. / 5.375 final drive / Powr Lok Front + Rear / Dualmatic drive flanges / deluxe Koenig half cab / 12 volt generator
2nd full re-build using the best from all vintages of CJ-3B

1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
Currently serving as my one and only DAILY DRIVER

St Louis
Top
yjcanibul
Posted: Oct 27 2010, 09:00 PM


Member


Group: Members
Posts: 856
Member No.: 118
Joined: 16-November 08



try item # 110569237045

i will have a closer look at it tonight

i can lay them out a post a pic

and/or

measure anything of interest ...

curious how well it might work before
i open my carb up ...


--------------------
57 3B : big speedo / Hurricane / YF 938 SD / IAY-4012 / T90 / D18 / 5.375 final drive / open diffs / Firestone 6ply Military NDCC / 12v Delco SI alt / Kayline Top / venting windshield / tub patched / "still fixing leaks one at a time"

89 wrangler : h/duty axles + 5spd / 200+hp 4.2L / arb locked / multiport fuel inj / warn hubs+winch / 1/4 mil km / fishing+trail riding / gets me to work
Top
Doug
Posted: Feb 20 2011, 12:12 AM


Boise, Idaho


Group: Co-Admin
Posts: 634
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Joined: 15-October 08



Randy,

Did you ever try this zip kit? I bought one too and was wondering if yours worked out for you or not.

I have a spare 938 SD that I took apart yesterday with intentions of doing a full rebuild. The first thing the manual says to put back in is the throttle shaft seal and retainer. I didn't see either in the kit. Of course, there didn't appear to be either when I was taking the carb apart, either....

This rebuild might be a bit more complicated than I expected dry.gif I will probably have to start a separate thread so I can start asking questions and get this rebuild done correctly.

Here are a few pics of the kit, in case you're still interested, Ken:

user posted image

user posted image

user posted image


--------------------
1963 CJ3B - F134 Hurricane, T-90C, D-18, 5.38s, Overdrive, 938YF, 12V alternator
1969 Bronco - 302, 3sp, D-20
My YouTube Channel Photobucket
Top
jyotin
Posted: Feb 20 2011, 12:43 PM


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Group: Members
Posts: 657
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Joined: 18-October 08



Carter skipped the "SB" model and went from "SA" to "SC" directly. I suppose they skipped "SB" for obvious reasons....



--------------------
It's just my luck that something good is going to happen to me today.
54 - 3B - down on the farm
67 - cj6 - former state of Alabama vehicle
?? - cj5 T98a - made from spare parts - Ford tractor blue
Top
oldtime
Posted: Feb 20 2011, 04:55 PM


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Posts: 4,396
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Joined: 12-July 08



QUOTE
I suppose they skipped "SB" for obvious reasons....

That's right .....Ha Ha Ha !

QUOTE
I will probably have to start a separate thread so I can start asking questions and get this rebuild done correctly.

Those kits look really good !


--------------------
1953 TRANS-VINTAGE CJ-3B / AC 4693 fuel pump / YF 938 SD / Hurricane / 9-1/4" Auburn clutch / T90-C / 2.46 ratio D-18 / Warn O.D. / 5.375 final drive / Powr Lok Front + Rear / Dualmatic drive flanges / deluxe Koenig half cab / 12 volt generator
2nd full re-build using the best from all vintages of CJ-3B

1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
Currently serving as my one and only DAILY DRIVER

St Louis
Top
jeepdan
Posted: Feb 22 2011, 11:06 AM


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Group: Members
Posts: 226
Member No.: 802
Joined: 17-February 10



The YF carb on my 64 CJ3B has the number 3200S stamped into the web. Is this carburetor correct to my jeep, or is it a transplant? Also would a rebuild kit for a YF 934 SD be compatable?


--------------------
Dan Walton Jr. Wheeling, WV

1964 U.S. Army CJ3B ( pride and joy)
05 Jeep Liberty CRD (daily driver)
05 Jeep Liberty CRD (daughter's)
91 Grand Wagoneer (in storage)
two 56 Willys pickups (one, restoration started, never finished)
M416 1/4 Ton trailer
1967 Kaiser Jeep M-715 (being restored to original)
Top
oldtime
Posted: Feb 22 2011, 11:50 AM


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Posts: 4,396
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Joined: 12-July 08



Carter YF 3200 S is listed for Kaiser fleetvan with F-134 Hurricane.
The repair kit should be identicle with the 938 models.

Is this YF 3200 S a vented carburretor ?
Is there a vent hose that runs from the top of the carburetor to tha oil bath air filter ?

See: http://z4.invisionfree.com/CJ3B_Bulletin_B...=0#entry2570864


--------------------
1953 TRANS-VINTAGE CJ-3B / AC 4693 fuel pump / YF 938 SD / Hurricane / 9-1/4" Auburn clutch / T90-C / 2.46 ratio D-18 / Warn O.D. / 5.375 final drive / Powr Lok Front + Rear / Dualmatic drive flanges / deluxe Koenig half cab / 12 volt generator
2nd full re-build using the best from all vintages of CJ-3B

1962 OPTIONAL-STOCK CJ-3B / Warn O.D. / Tigertop / Transport yellow (orange)
Currently serving as my one and only DAILY DRIVER

St Louis
Top
jeepdan
Posted: Feb 22 2011, 06:56 PM


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Group: Members
Posts: 226
Member No.: 802
Joined: 17-February 10



No, there is no bowl vent. Perhaps the top was replaced with an older type.


--------------------
Dan Walton Jr. Wheeling, WV

1964 U.S. Army CJ3B ( pride and joy)
05 Jeep Liberty CRD (daily driver)
05 Jeep Liberty CRD (daughter's)
91 Grand Wagoneer (in storage)
two 56 Willys pickups (one, restoration started, never finished)
M416 1/4 Ton trailer
1967 Kaiser Jeep M-715 (being restored to original)
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