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Carb rebuild today!

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clodhopper
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Carb rebuild today!

Postby clodhopper » Sat Oct 06, 2012 7:38 pm

Took the carb off of betty lou last night, took it apart, and dropped it in the cleaning can to soak. Got up this morning, rinsed it, soda blasted, washed in hot soapy water, and then commenced to installing the complete carb rebuild kit from Steiner. Made a trip up to TSC to purchase a 4' piece of 3/16" steel rod (smooth) That allowed me to make a new throttle rod (mine was almost worn in two at the throttle shaft connection) I also made a new choke rod (didn't have one, PO used a choke cable and a stay bolted to the carb. Worked good, but not original). I also used a piece of sheet metal to make a choke lever as I installed a new choke shaft, but did not have the lever. I basically folded it over, cut a slot in it, drilled a hole at the bottom of the slit that would fit over the choke shaft, and installed a bolt/nut at the top where I had folded it ove, to tighten up the slot I cut. Worked like a champ! After all this, I have the $54 in the rebuild kit, and 2.99 in the smooth steel rod plus my time, and basically its all like new now!

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Rudi
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Re: Carb rebuild today!

Postby Rudi » Sat Oct 06, 2012 8:13 pm

Image :D Sounds like you had fun and am curious to see what you came up with for the choke lever.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


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clodhopper
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Re: Carb rebuild today! update w// pics

Postby clodhopper » Sat Oct 06, 2012 9:19 pm

Rudi wrote:Image :D Sounds like you had fun and am curious to see what you came up with for the choke lever.

Here you go Rudi. I couldnt get one of the choke clamp installed. It wouldnt take in the dark. Here is a pic of the sheetmetal I used to make the clamp.
sheetmetal.jpg

Here is a first attempt at a clamp. The hole for the shaft needs to be one drill size smaller than the shaft.
chokeclamp.jpg

Heres a picture of the original throttle shaft. Its hard to see, but it was worn pretty bad.
oldrod.jpg

Here is the new rod I made from scratch.
throttlerodnew.jpg

Here is the new choke rod I made from scratch. Used a picture from TMs website as a guide.
chokerod.jpg

And finally, here is a pic of the carb reattached. Looks great and runs like champ!
carbcomplete.jpg

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Rudi
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Re: Carb rebuild today!

Postby Rudi » Sat Oct 06, 2012 9:26 pm

The rods look great -- nicely done. The clamp is a neat piece of using what you gots handy. Necessity if the mother of invention after all. Neat solution.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship


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clodhopper
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Re: Carb rebuild today!

Postby clodhopper » Sun Dec 02, 2012 1:55 pm

Also, i forgot to note that the side of the carb where the main jet screws in was slightly goofed up, enough that the brass washer would not seal it from leaking, so to correct it I used my gasket punches to cut a washer out of an old tractor tire inner tube, and placed it between the washer and the carb body. Works great, no leaks. If you look close at the last picture you can see it.

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Re: Carb rebuild today!

Postby CapeCodCubs » Sun Dec 02, 2012 4:21 pm

Nice looking carb. Good work
Image

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Re: Carb rebuild today!

Postby Bob McCarty » Sun Dec 02, 2012 4:22 pm

Clodhopper, The main jet should have a fiber washer, not a brass one. It looks like you found a fix though.

Bob
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Bob Perry
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Re: Carb rebuild today!

Postby Bob Perry » Sun Dec 02, 2012 4:26 pm

If I were the teacher, you'd get an "A".
REMEMBER: Keep it correct or you may face the

Image

CubitisNH
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Re: Carb rebuild today!

Postby CubitisNH » Sun Dec 02, 2012 8:30 pm

Nice job on the carb and neat solution to the common"missing choke lever"problem!
Mike
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Hengy
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Re: Carb rebuild today!

Postby Hengy » Mon Dec 03, 2012 7:12 am

One note on the rubber inner tube washer... With the ethanol in today's gas, that rubber will wear out and fail if it get in contact with any gas. When we rebuilt Merlin's carb at the cubfest where I got him, we used a nitrile rubber o-ring in place of gasket on the carb. Worked great for about 3 years and then the rubber failed.
Mike (Happy as a Lark in Allison Park, PA)
Image Image

Check out my Restoration Thread (1955 Cub, Lewis)

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clodhopper
10+ Years
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Posts: 807
Joined: Sat May 07, 2011 8:20 pm
Zip Code: 27526
Tractors Owned: 1950 Cub Demo
1978 Cub Cadet 1650
cub 193 plow
cub 174 planter
cub sidedresser
cub 144 cultivator
cadet 50C deck
Circle of Safety: Y

Re: Carb rebuild today!

Postby clodhopper » Mon Dec 03, 2012 9:13 am

Hengy wrote:One note on the rubber inner tube washer... With the ethanol in today's gas, that rubber will wear out and fail if it get in contact with any gas. When we rebuilt Merlin's carb at the cubfest where I got him, we used a nitrile rubber o-ring in place of gasket on the carb. Worked great for about 3 years and then the rubber failed.

I know what you mean, but with a whole rear innertube to cut washers from, I doubt it will be much of a problem! :D

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bob in CT
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Re: Carb rebuild today!

Postby bob in CT » Thu Apr 18, 2013 5:27 am

Hengy wrote:One note on the rubber inner tube washer... With the ethanol in today's gas, that rubber will wear out and fail if it get in contact with any gas. When we rebuilt Merlin's carb at the cubfest where I got him, we used a nitrile rubber o-ring in place of gasket on the carb. Worked great for about 3 years and then the rubber failed.

According to an industry O-ring compatibility guide nitrile is compatible with both ethanol and gasoline.


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