Another point of frustration with my resurrected 1951...
I spent the long buck on the deluxe high-end carburetor rebuild kit with all the jets, gaskets, packings and shafts. Supposedly the "good" kit.
The %$#@ needle won't seal. I've had the carburetor apart 4 times now.
The float height is set properly: 1-13/32" with the needle closed, and 3/16" of travel.
You can hear the float clink up and down when you turn the carburetor over in your hand gently, so it's not stuck.
The float is not taking on gas and sinking, it is dry as a bone inside.
It is a steady slow drip-drip-drip, seems to come out through the bowl gasket.
This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link: Privacy Policy
NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.
Carb drip - new needle from the good expensive kit won't sea
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.
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.
-
- 10+ Years
- Posts: 4949
- Joined: Tue Jun 08, 2004 3:04 pm
- Zip Code: 14559
- Circle of Safety: Y
- Location: Rochester, NY
-
- Team Cub Mentor
- Posts: 20378
- Joined: Fri Jul 02, 2004 9:52 pm
- Zip Code: 65051
- Circle of Safety: Y
- Location: Mo. Linn
Re: Carb drip - new needle from the good expensive kit won't
Eugene wrote:Bench test for source of the leak:Eugene wrote:Hose barb to fit carb inlet, clear plastic tubing to match the hose barb, funnel small enough to fit inside the clear plastic tubing and a bottle of rubbing alcohol from the dollar store.
Remove carburetor top, turn and block upside down on bench with hose barb, tubing and funnel attached. Funnel above carburetor, fill with alcohol. Observe needle valve area and remainder of carb top for source of leakage.
I have an excuse. CRS.
-
- 10+ Years
- Posts: 1431
- Joined: Fri Jan 25, 2008 9:02 am
- Zip Code: 00000
- Circle of Safety: Y
Re: Carb drip - new needle from the good expensive kit won't
I've had good luck with the Viton tip needle valve and new seat but you may try the old if you think that is the problem.
-
- Team Cub Mentor
- Posts: 17488
- 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: Carb drip - new needle from the good expensive kit won't
Eugene's technique may very well show you where the leak originates. If it is leaking where the carb top, gasket and needle cage meet, try a little Permatex High Performance Thread Sealant on the needle cage threads. Sometimes a little corrosion or unevenness on the carb top surfaces will prevent the gasket alone from sealing adequately. Use the sealant sparingly and let it cure at least 48 hours before introducing fuel. Let us know how it goes.
-
- 5+ Years
- Posts: 230
- Joined: Thu Jul 10, 2014 7:18 am
- Zip Code: 24551
- Circle of Safety: Y
Re: Carb drip - new needle from the good expensive kit won't
I used Permatex 1 or 2 gasket seal on the threads, but when it came time to put the new Viton tipped needle in, I reused the old all-metal needle. Don't know why, but I reasoned it didn't see much wear over the past 60 years and was still working alright. I used a small amount of polish on the needle and cage and basically lapped them so the mating surfaces were clean and smooth.
-
- 10+ Years
- Posts: 389
- Joined: Thu Jul 02, 2009 1:06 pm
- Zip Code: 70816
- Circle of Safety: Y
- Location: Baton Rouge Louisiana
Re: Carb drip - new needle from the good expensive kit won't
A trick a old motorcycle mechanic showed me was to put a wooden match in a drill. Put a drop of oil on the seat and then use the match to polish the seat. It's worked every time for me and the only hard part is finding a wooden match
"Tiger" 1974 International Cub
"Littl' Smokey" 104 Cub Cadet
"Red Light" 1952 Farmall Cub with 151 disc plow
"Lucky" 1970 International 140
"Littl' Smokey" 104 Cub Cadet
"Red Light" 1952 Farmall Cub with 151 disc plow
"Lucky" 1970 International 140
-
- Similar Topics
- Replies
- Views
- Last post
-
- 4
- 253
-
by Gary Dotson
Sat Jul 24, 2021 6:36 am
-
- 1
- 147
-
by staninlowerAL
Sun Aug 07, 2022 4:24 am
-
-
Identification of my Engine and Carb - in order to get a new Carb
by JKaechler » Tue Dec 07, 2021 9:25 pm » in Farmall Cub - 14
- 626
-
by Don McCombs
Thu Dec 09, 2021 11:42 am
-
-
- 3
- 313
-
by Magnum
Sat Apr 16, 2022 9:26 pm
-
- 10
- 377
-
by Clemsonfor
Mon Aug 01, 2022 9:05 pm
Who is online
Users browsing this forum: Gary Dotson and 6 guests