Fuel line shut off

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ajhbike
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Tractors Owned: 1957 Cub- Lorelai
1956 Lo-Boy FH- Rory
1951 Super C FH- Emily
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72" Rear Blade, Carryalls, Pallet Forks, IH 263 2 Row Cultivator, 7' Rake, Brush Hog, Horn-Draulic FEL
Location: Branford, CT

Fuel line shut off

Postby ajhbike » Mon Apr 03, 2017 12:59 pm

are there any quicker ways to shut off the fuel to the bowl rather than the 6 turns on and off? The guy I bought it off of said that if not using for 30 mins or so then shut off the fuel. Seems like there is a quicker way.

Bob McCarty
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Re: Fuel line shut off

Postby Bob McCarty » Mon Apr 03, 2017 1:22 pm

There is a "how to" that Rudi did about putting a ball valve inline: viewtopic.php?f=139&t=46815

Bob
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we need to think differently."
-Albert Einstein

Eugene
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Re: Fuel line shut off

Postby Eugene » Mon Apr 03, 2017 5:27 pm

I remove the sediment bowl and install a ball valve directly in the tractor's fuel tank. I use an in line, gravity fed, fuel filter.
I have an excuse. CRS.

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Glen
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Re: Fuel line shut off

Postby Glen » Mon Apr 03, 2017 6:40 pm

Hi,
Unless it is leaking or dripping, it should not have to have the fuel shut off after 30 minutes.
The needle and seat in the carburetor wear out after years of use, then it can drip on the ground sitting, or the float level could be wrong.
If there is nothing leaking or dripping, it doesn't need the fuel shut off so often, my opinion. :)

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John *.?-!.* cub owner
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Re: Fuel line shut off

Postby John *.?-!.* cub owner » Mon Apr 03, 2017 8:12 pm

It is not necessary to open the fuel valve all the way, There is a packing inside the nut on the shut off shaft to prevent leaks, It doe not need to be opened completely like an LP valve. Just a round or so is sufficient. If it leaks when only opne a round or so, you may need to tighten the packing nut, or put in new packing..Cotton string has been the old standby for fuel shut off valves for many years.
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Jim Becker
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Re: Fuel line shut off

Postby Jim Becker » Mon Apr 03, 2017 9:16 pm

Some have a packing (for which some have used a tiny o-ring). However, many of the originals are a back seating style. They have to be fully open to keep the stem from leaking. I have made a simple tool out of a chunk of PVC conduit 1/2" pipe that makes it easy to reach the knob and spin it either way.

viewtopic.php?f=144&t=46168

brewzalot
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Re: Fuel line shut off

Postby brewzalot » Mon Apr 03, 2017 10:25 pm

ajhbike wrote:are there any quicker ways to shut off the fuel to the bowl rather than the 6 turns on and off?

If you can work one of these from Mcmaster-Carr into your system they are really nice. Expensive, but nice.

fuel shut off.png
fuel shut off.png (14.74 KiB) Viewed 492 times



Compact Threaded On/Off Valves for Fuels

The low-profile wedge handle lets you install these valves in low-clearance fuel pipelines. They are commonly called plug valves. The handle resists accidental movement when snagged or bumped.

Pipe Size End-to-End
Lg. Max. Pressure Temperature
Range, ° F Seal
Material Valve
Type Specifications
Met Each

NPTF Female × NPTF Female

Brass Body and Plug

1/4 × 1/4 2 1/8" 15 psi @ 70° F -40° to 250° Buna-N Plug UL Listed 7910K85 $19.78
1/4 × 1/4 2 1/8" 30 psi @ 70° F -40° to 250° Buna-N Plug __ 7910K15 14.45

NPTF Female × NPTF Male

Brass Body and Plug

1/8 × 1/8 2" 30 psi @ 70° F -40° to 250° Buna-N Plug __ 7910K11 14.06
1/4 × 1/4 2 1/4" 15 psi @ 70° F -40° to 250° Buna-N Plug UL Listed 7910K82 19.12
1/4 × 1/4 2 1/4" 30 psi @ 70° F -40° to 250° Buna-N Plug __ 7910K12 14.06
3/8 × 3/8 2 7/16" 15 psi @ 70° F -40° to 250° Buna-N Plug UL Listed 7910K83 22.65
3/8 × 3/8 2 7/16" 30 psi @ 70° F -40° to 250° Buna-N Plug __ 7910K13 15.67

staninlowerAL
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Re: Fuel line shut off

Postby staninlowerAL » Tue Apr 04, 2017 4:30 am

I also used a 1/8 x 1/8 quick open valve on my LoBoy.
Valve+2.JPG

ajhbike
501 Club
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Posts: 818
Joined: Thu Mar 09, 2017 4:06 pm
Zip Code: 06405
Tractors Owned: 1957 Cub- Lorelai
1956 Lo-Boy FH- Rory
1951 Super C FH- Emily
1968 JD 3020- Paris
Woods 59 CLF
54A Blade, 54-L Blade, C-22 Sickle
C-21-P Sickle Mower
72" Rear Blade, Carryalls, Pallet Forks, IH 263 2 Row Cultivator, 7' Rake, Brush Hog, Horn-Draulic FEL
Location: Branford, CT

Re: Fuel line shut off

Postby ajhbike » Mon Apr 17, 2017 5:30 pm

Thanks all. I have been watching it and there is a drip every 5 seconds when the engine is off. It is coming from a hole on the bottom...under where the choke attaches. Any ideas how to stop or is this a carburetor job with a million pieces?

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Glen
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Location: Wa.

Re: Fuel line shut off

Postby Glen » Mon Apr 17, 2017 6:51 pm

Hi,
If the cub is dripping gas on the ground sitting, it could be dirt in the needle and seat, at the float. Even a very small piece of dirt.
The needle and seat wear out after years of use, then they don't seal anymore, then they need replacing.
Or the float level could be wrong, it should be set by measuring it, like the Cub service manual says.
The Cub's IH carburetor is simple to work on, if you take it apart, pull the 2 halves straight apart, or you could break the small idle tube.
Blow out all the passages with air, wear your safety glasses when using the air.

Here is a new needle and seat at TM Tractor, if you want to see them.

http://www.tmtractor.com/new/fl/5183fp.htm

Here is a page from the Cub service manual showing the float height, the IH carb is in the upper pics. To check it, you need a measure with 32nd inch markings. Turn the upper half of the carb upside down with the needle and seat, and float assembled, and measure from the bottom of the float to the flat surface of the casting. Bend the float arm between the float and the pivot to adjust the height.
The float drop needs checking too, bend the little piece sticking up from the float arm, by the pivot to adjust it.

http://www.farmallcub.info/manuals/gss- ... 002-09.jpg

If it is the IH carb, check the top half where it seals to the bottom half with a straight edge, while it is apart, the metal can be warped. Don't tighten the screws hard that hold the halves together, it can warp the top half.
There should be a little screen in the carb inlet, by the threads, it should be clean. Here is a pic of it below from TM Tractor.
The gas should drip out the hole made on the bottom of the carb if it is flooding, or the needle and seat is not sealing. Here is a pic below from TM Tractor of the hole. :)
Attachments
Cub carb 7.jpg
Cub carb 7.jpg (12.83 KiB) Viewed 338 times
Cub carb 6.jpg

ajhbike
501 Club
501 Club
Posts: 818
Joined: Thu Mar 09, 2017 4:06 pm
Zip Code: 06405
Tractors Owned: 1957 Cub- Lorelai
1956 Lo-Boy FH- Rory
1951 Super C FH- Emily
1968 JD 3020- Paris
Woods 59 CLF
54A Blade, 54-L Blade, C-22 Sickle
C-21-P Sickle Mower
72" Rear Blade, Carryalls, Pallet Forks, IH 263 2 Row Cultivator, 7' Rake, Brush Hog, Horn-Draulic FEL
Location: Branford, CT

Re: Fuel line shut off

Postby ajhbike » Tue Apr 18, 2017 6:09 am

Thanks, I will take a pic and post it or see the make because neither of these look like mine

can
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Re: Fuel line shut off

Postby can » Thu Apr 20, 2017 9:52 am

I bought a Briggs & Stratton inline gas line shut-off and put where it's easy to get to


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