Carburator Inlet Question

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
xraycajun
Cub Star
Cub Star
Posts: 144
Joined: Sun Aug 20, 2017 11:05 am
Zip Code: 70769

Carburator Inlet Question

Postby xraycajun » Tue Feb 05, 2019 1:07 pm

I picked up a new steel fuel line to replace the rotten rubber one that had been on the tractor. I was disappointed to find that the new correct fitting will not go into the threads of the carb top. I guess the thread was re-cut many years ago. Here is a picture of the fitting that was in there... and the new fitting. Is there a way to adapt the correct fitting into the carb top now, or am I stuck with the rubber fuel line?
Attachments
tractor-127.JPG

User avatar
Barnyard
Team Cub
Team Cub
Posts: 21576
Joined: Tue Aug 07, 2007 3:39 pm
Zip Code: 45030
Tractors Owned: At This Time
40 Farmall Cubs (Round Hood)
2 Farmall Cub (Square Hood)
2 IH Cubs (Square Hood)
5 Lo-Boys (Round Hood)
2 Lo-Boys (Square Hood)
2 Farmall 404's
1 Farmall H
1 Ferguson 20
1 Cub Cadet 125
1 Kubota B-7100
Circle of Safety: Y
Location: OH, New Haven (Hamilton County)

Re: Carburator Inlet Question

Postby Barnyard » Tue Feb 05, 2019 1:10 pm

You can helicoil the inlet.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.

Circle of Safety

User avatar
Urbish
5+ Years
5+ Years
Posts: 1712
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1958 International Cub LoBoy
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B

Cub-193 Moldboard Plow
Cub-54A Leveling and Grader Blade
Cub Loboy L-54 Leveling and Grader Blade
Unknown 5' Single Gang Disc Harrow
Circle of Safety: Y
Location: Manchester, MI

Re: Carburator Inlet Question

Postby Urbish » Tue Feb 05, 2019 1:14 pm

You'll have to figure out whether the new threads were cut for NPT, Compression, or straight SAE threads. Check out this post: http://farmallcub.com/phpBB2/viewtopic.php?f=1&t=96706&p=761699

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 23143
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: Carburator Inlet Question

Postby John *.?-!.* cub owner » Tue Feb 05, 2019 3:25 pm

Does the "correct" fitting slip into the hole? If so, it is probably too far oversized for a Helicoil, in which case I do not have a good suggestion. If it is just a matter of threads, then installing a Helicoil is a good possibility. The original is 1/2 inch bolt threads as I recall. If I am wrong I believe someone will correct me. Have you tried taking your original fitting and/or carburetor to a real auto parts store, such as NAPA, Carquest, or in many areas O'reillys? hey may be able to help with an adapter.
Last edited by John *.?-!.* cub owner on Tue Feb 05, 2019 3:27 pm, edited 1 time in total.
If you are not part of the solution,
you are part of the problem!!!

Frozenstate
Cub Star
Cub Star
Posts: 136
Joined: Sat Sep 09, 2017 6:20 am
Zip Code: 14414
Tractors Owned: F- CUB Fast hitch 1955 #191991J
Snow plow
Super Chief moldboard plow
Spring tooth harrow
Disc
York rake
Carry all
Fast hitch Mott flail mower

Ferris IS 100 61" zero turn

Re: Carburator Inlet Question

Postby Frozenstate » Tue Feb 05, 2019 3:27 pm

Would a reducing fitting work?

ScottyD'sdad
Cub Pro
Cub Pro
Posts: 6742
Joined: Thu Aug 31, 2006 7:00 pm
Zip Code: 02769
Tractors Owned: 6"F" cubs
5 lo-boys
1 154
1 184
1 IH444
1 Oliver OC3 crawler
1 AC D10
1 IH 100 manure spreader
1 IH model B corn grinder
3 power units
cub demonstrator
Circle of Safety: Y
Location: Ma. Rehoboth

Re: Carburator Inlet Question

Postby ScottyD'sdad » Tue Feb 05, 2019 3:47 pm

John *.?-!.* cub owner wrote:Does the "correct" fitting slip into the hole? If so, it is probably too far oversized for a Helicoil, in which case I do not have a good suggestion. If it is just a matter of threads, then installing a Helicoil is a good possibility. The original is 1/2 inch bolt threads as I recall. If I am wrong I believe someone will correct me. Have you tried taking your original fitting and/or carburetor to a real auto parts store, such as NAPA, Carquest, or in many areas O'reillys? hey may be able to help with an adapter.


That's 1/2 inch NF bolt thread. (Fine thread), John.

Ed
Image
Member of Chapter 18, and National
Circle of Safety

User avatar
Ken (48 Cub)
10+ Years
10+ Years
Posts: 900
Joined: Mon Feb 03, 2003 11:10 am
Zip Code: 40023
Tractors Owned: 1948 FCub
Circle of Safety: Y
Location: KY, Fisherville

Re: Carburator Inlet Question

Postby Ken (48 Cub) » Tue Feb 05, 2019 3:53 pm

Mine was the same way. That barbed fitting for rubber hose has over sized the carb inlet. It can be helicoiled...Rick Prentice did mine.
Ken, Annie the '48 Cub & Marie the '57 Loboy.

I think we gotter if'n she don't kick, Andy Griffith.

xraycajun
Cub Star
Cub Star
Posts: 144
Joined: Sun Aug 20, 2017 11:05 am
Zip Code: 70769

Re: Carburator Inlet Question

Postby xraycajun » Tue Feb 05, 2019 4:02 pm

The correct fitting fits in... with lots of play. I think the inlet was drilled and re-threaded when the original fuel line was replaced. I will look for an adapter.... but hoping you guys had other suggestions as well.

xraycajun
Cub Star
Cub Star
Posts: 144
Joined: Sun Aug 20, 2017 11:05 am
Zip Code: 70769

Re: Carburator Inlet Question

Postby xraycajun » Tue Feb 05, 2019 4:09 pm

OK... so I read the post about all the fittings and such.. That's far out of my area of understanding. Does anyone have a pictoral guide outlining the procedure to adapt the fittings? I will see if I can determine the thread size inside the inlet...

User avatar
Barnyard
Team Cub
Team Cub
Posts: 21576
Joined: Tue Aug 07, 2007 3:39 pm
Zip Code: 45030
Tractors Owned: At This Time
40 Farmall Cubs (Round Hood)
2 Farmall Cub (Square Hood)
2 IH Cubs (Square Hood)
5 Lo-Boys (Round Hood)
2 Lo-Boys (Square Hood)
2 Farmall 404's
1 Farmall H
1 Ferguson 20
1 Cub Cadet 125
1 Kubota B-7100
Circle of Safety: Y
Location: OH, New Haven (Hamilton County)

Re: Carburator Inlet Question

Postby Barnyard » Tue Feb 05, 2019 4:22 pm

Yours is probably 1/8” pipe thread. Many po’s would force that fitting into the inlet causing the inlet threads to strip.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.

Circle of Safety

User avatar
Don McCombs
Team Cub Mentor
Team Cub Mentor
Posts: 13710
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: Carburator Inlet Question

Postby Don McCombs » Tue Feb 05, 2019 4:37 pm

If time is not critical, I know you could get it resolved at Buddy's cubfest in late March.
Don McCombs
MD, Deep Creek Lake

Image
Proud Member of Maryland Chapter 39

User avatar
Glen
5+ Years
5+ Years
Posts: 3268
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Carburator Inlet Question

Postby Glen » Tue Feb 05, 2019 8:07 pm

Hi,
I'm not sure if your carburetor in the pic is fastened onto the manifold in the normal position, but the choke rod is not in the right position. It shouldn't be rubbing on the Touch Control tubes, the engine vibration can wear the rod into the tubes over time.
The rod should be above the tubes. Below is a pic showing how it should be.

The lever on the carb usually has to point straight down, when the choke valve is fully open.
Below is a pic from TM tractor showing that. You can change the position of the lever on the shaft, if needed.

The rod may need bending to make it the right shape. If it does not go above the tubes, it may need more bend where the bend is in the pic.
There is another bend in the rod about 3 or 4" in from the dash, so the loop on the end of the rod is level with the ground. :)
Attachments
Cub.jpg
Cub carb.jpg

xraycajun
Cub Star
Cub Star
Posts: 144
Joined: Sun Aug 20, 2017 11:05 am
Zip Code: 70769

Re: Carburator Inlet Question

Postby xraycajun » Wed Feb 06, 2019 12:30 pm

Good catch on the choke rod.... Its always been that way as long as I remember. I'll have a look at that too...


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: No registered users and 5 guests