Leaky Carburator

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Grandhose
Posts: 16
Joined: Sun Apr 19, 2015 10:26 pm
Zip Code: 41539
Tractors Owned: 1959 Cub
Location: Kimper, KY

Leaky Carburator

Postby Grandhose » Fri Oct 09, 2015 7:51 pm

Can't keep gas in the tank. Continuous drip from carb. I bought a carb rebuild kit - figure I'll just take the carb off and use the kit to "rebuild" it. New ground for me, Any suggestions?

danovercash
10+ Years
10+ Years
Posts: 3367
Joined: Mon Feb 17, 2003 8:48 pm
Zip Code: 28081
Circle of Safety: Y
Location: NC, Kannapolis

Re: Leaky Carburator

Postby danovercash » Fri Oct 09, 2015 7:58 pm

Hope it's a quality kit. Cheap ones hurt more than help. Watch out for the idle tube easy to break, expensive to replace. Get a good bowl gasket and maybe a needle and seat. Check float height and needle seal. Look up Lurker Carl's carb fixes for good information. You can do it!
"I'd rather be a mechanic in the shop"- Henry Ford

252646 & 221525. 195897 (Gone, but not forgotten)

Grandhose
Posts: 16
Joined: Sun Apr 19, 2015 10:26 pm
Zip Code: 41539
Tractors Owned: 1959 Cub
Location: Kimper, KY

Re: Leaky Carburator

Postby Grandhose » Fri Oct 09, 2015 8:57 pm

I have no idea of the quality. It is a "Mark's Carb & Magneto Service" Carburetor Repair Kit. 25 pieces in all. Couple gaskets, some brass fittings, lock washers, fine lookin' steel screws, etc. don't know what the fiber bushings/rings are for yet, but I've got three!

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Glen
5+ Years
5+ Years
Posts: 1964
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: Leaky Carburator

Postby Glen » Fri Oct 09, 2015 9:25 pm

Hi,
I agree with Dan above.
Usually if a Cub carburetor is dripping when the Cub is sitting, it is the needle and seat, at the float, or the float level is too high, or both. The needle and seat wear out after years of use. I've had the same Cub for many years, and had to replace the needle and seat several times over the years. The last one I put in has lasted much longer, don't know why, but has. All were from IH, and Case IH.
Pull the 2 halves of the carb straight apart for 3 or 4 inches, the idle tube is easy to break off if you are not careful. It is fastened onto the top half of the carb.
Blow out the passages with air when it is apart. The dirt and goop settles in the bottom of the carb, and in the little passages. Be sure the passages are open and clean. Wear your safety goggles then.
Don't over tighten the 4 screws that hold the 2 halves together, it is easy to warp the top half over where the bowl is. Check the halves where the gasket goes with a straight edge tool, and see if they are straight, and not warped. I think there are men on here that can straighten a top if it is warped.
Here are pages from the Cub parts book showing the IH carb. :)

http://www.farmallcub.info/manuals/cub_ ... 012-12.jpg

http://www.farmallcub.info/manuals/cub_ ... 012-13.jpg

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schmibm
10+ Years
10+ Years
Posts: 688
Joined: Tue Jun 06, 2006 10:37 pm
Location: Janesville, IA

Re: Leaky Carburator

Postby schmibm » Fri Oct 09, 2015 9:29 pm

Not sure how quickly it drips. Rebuilding the carb will probably help. However, you typically want to shut the gas off and let it run out of gas in the bowl first. This is my norm for shutdown on any of my tractors. Then you don't have to worry about gas going bad in the carb and causing issues. If the carb still drips, then your fuel filter base needs replaced.
1949 Project Cub
1955 Cub Lo-Boy "Jack"
1957 Cub Lo-Boy "Mac"
1957 Cub with 5' Woods Belly Mower "James"
24 other Farmalls A thru SMTA.

danovercash
10+ Years
10+ Years
Posts: 3367
Joined: Mon Feb 17, 2003 8:48 pm
Zip Code: 28081
Circle of Safety: Y
Location: NC, Kannapolis

Re: Leaky Carburator

Postby danovercash » Sat Oct 10, 2015 8:33 pm

Tisco and tractor supply are the ones you want to stay away from. If the kit originally came from the same supplier as CNH, Steiner, or Messicks, probably ok. Clean main jet with FINE wire and compressed air only. It's the hex head plug on the side of carb.
Here's the link!
http://www.cleancomputes.com/Cub/Mainte ... index.html
"I'd rather be a mechanic in the shop"- Henry Ford

252646 & 221525. 195897 (Gone, but not forgotten)


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