International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tech Archives > Engine

Thread Tools Display Modes
Old 01-12-2008, 02:11 AM
JeepBountyHunter's Avatar
JeepBountyHunter JeepBountyHunter is offline
Join Date: Jul 08, 2002
Location: Cardington, Ohio 43315
Posts: 10,248
Great...just now noticed your post...this is awesome!

I'll probably print this up with some other stuff I printed over the years.
2005 Mustang Convertible...meh....

1946 Willys CJ2A, getting ready to fix up.

Too many hobbies! $$$
Reply With Quote
Old 01-12-2008, 11:06 PM
J10Joe's Avatar
J10Joe J10Joe is offline
Bleedin' Gasoline
Join Date: Oct 06, 2005
Location: UPper Michigan
Posts: 1,699
yeah, print away. this is gold
1985 J-10 LWB
4" lift, TFI, MC 2100

1988 J20-one of the last ones
8400 GVRW
TFI, Rustolium (brushed)
Fisher/Meyers plow truck
Reply With Quote
Old 01-12-2008, 11:16 PM
joe joe is offline
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 22,392
Excellent write-up Mike. Very very cool you took the time to document the rebuild...very cool indeed. Thanks.
"Don't mind me. I'm just here for the alibi"
Reply With Quote
Old 03-15-2008, 11:08 AM
Ristow Ristow is offline
Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,247
lets wrap it up.

first the accelerator pump. note the mounting hole on the throttle shaft,and the upper adjusting nut arrangment.

note the dash and mark that must align when installed.use the nut on the link to adjust.

now onto the choke adjustments.note how the choke pull-off linkage attaches to the carb and pull-off diaphragm. starting with INITIAL CHOKE PLATE CLEARANCE.

with the electric choke cap installed,rotated to the rich (closed) side,open and close the throttle to set the choke.the choke plate will snap shut,and the fast idle cam will be on the top step,meaning,the screw with the spring will be sitting on the biggest step on the black fast idle camas shown. that screw is also what sets the fast idle rpms,which you will do after the carb is on the engine.

hook a vacuum pump to the choke pull-off diaphragm.and apply full vacuum,the diaphagm will pull back,opening the choke a bit as it does..

using a drill bit or allen wrench,and the measurment given in the manual for your vehicle year,measure the choke plate lower edge clearance,between the plate and carb body. use the 1/4" screw on the back of the pull-off diaphragm to adjust this measurment. i used the '75 spec of .166",and used an allen wrench that was close in size.

next,release the vacuum.put the fast idle cam on the second step,up against the shoulder of the high step. measure the choke plate clearance again,as above,but with no vacuum apllied. this is the FAST IDLE CAM ADJUSTMENT. this will be a smaller measurment than the initial clearance.

this is the fast idle cam adjusting screw.this will adjust the choke plate clearance for this setting. again,i used the '75 spec,.147",and a allen wrench that was close in size.

next,open the throttle to set the choke. apply vacuum to simulate a running engine. bump the throttle open and closed.the fast idle cam should go from the top step to the second step.

carb is ready for install and tuning,starting with fast idle speed,regular idle speed,then idle mixture via vacuum guage.

now,if when you are done,the truck starts,then fizzles out and dies,the initial choke clearance is too great,meaning the pull-off diaphragm is pulling the choke plate open too far.use the adjusting screw to remedy it,a little at a time,untill the truck stays running after startup. likewise,if the truck blubbers and chokes on gas after start up,the choke needs to be further opened by the pull-off.
Originally Posted by Hankrod
Ristows right.................again,

Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.

Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!

→ Where the kids hang out... come for the mindless chat,stay for the hand drawn emoticons.

It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...

Last edited by Ristow : 03-15-2008 at 11:16 AM.
Reply With Quote
Old 03-15-2008, 11:30 AM
FSJ Guy FSJ Guy is offline
Join Date: Mar 20, 2005
Location: Colorado
Posts: 10,061
Even though I have long ago sworn off carbs, this is a GREAT writeup!

GREAT pictures! (I know how hard it is to get good closeup photos. Nice job.)

I think the interior dome light is a nice touch.

I hope the Mods STICKY this.
Ethan Brady
1987 Grand Wagoneer, slightly longer than stock.

Don't mess with me. I once killed a living hinge.
Reply With Quote
Old 03-15-2008, 11:57 AM
Wayne's Avatar
Wayne Wayne is offline
Master Mechanic
Join Date: Feb 16, 2008
Location: auburn Wa.
Posts: 788
Nice job
Better than any manual i've seen.
78 Wagoneer 401/T400/bw/44F&R DD 4in lift
Reply With Quote
Old 03-15-2008, 12:21 PM
trellis8's Avatar
trellis8 trellis8 is offline
Ristows' Minion
Join Date: Jan 16, 2007
Location: Milwaukee, Wisconsin
Posts: 840
Thank you Obi-Wan!
1979 Widetrack Cherokee, 1984 Grand Wagoneer, 1985 Grand Wagoneer, 1973 J4000, 1982 Mustang GT, 1999 Chevy C2500 xcab, 2001 Chevy Van, 2000 Ford Expedition, 1989 F250 plow and 1951 Desoto Deluxe
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 01:08 AM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
corner corner