Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

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lucky1
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Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby lucky1 » Sat Dec 01, 2018 9:24 pm

Question...cub with no serial number tag. Trying to identify if it is the high horsepower model. lt has the zenith carb but hood decal is 75 and older version. Are there any other identifying methods?

received_799694737036565.jpeg

jsfarmall
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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby jsfarmall » Sat Dec 01, 2018 9:35 pm

Check out the casting number on the engine. I believe they are on the left side. Towards the bottom. There will be a casting code ex. 8-23-Y. Which is August 23 and the letter will stand for the year. That will get you close. The block was mostly the same from the beginning but on the later ones they will be close to the build date due to the lower numbers.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

Jim Becker
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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby Jim Becker » Sat Dec 01, 2018 9:39 pm

The higher horsepower engines started at engine number 312390. It should be stamped into the block near the carburetor.

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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby lucky1 » Sat Dec 01, 2018 9:54 pm

Awesome. Thanks, I will check tomorrow

inairam
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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby inairam » Sun Dec 02, 2018 8:08 am

look here to find the engine sn. http://www.tmtractor.com/id/id_003.htm.

I have a 75 that is just below SN 312390. I think when they made the changes it also got a long stripe. My guess is this tractor is before the hp increase.
When you only have 9 horsepower you need to know the names of all of the ponies!

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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby Scrivet » Sun Dec 02, 2018 9:14 am

Looks like the bolster has been changed since its paint doesn't match. Whoever did it may have pulled the old serial number tag off to avoid confusion. Since the bolster has been most likely changed, maybe the hood could of also? I wouldn't go by which decal it has alone, the numbers will be the answer. Speaking of hoods, is that two piece a modification or the welds just came apart?

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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby tst » Sun Dec 02, 2018 10:55 am

It is an earlier one, has a generator

jsfarmall
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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby jsfarmall » Mon Dec 03, 2018 10:33 am

They had a little more power in the 60s didn't they? No not as much as the long stripes but more than the t
50s?
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

inairam
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Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby inairam » Mon Dec 03, 2018 1:14 pm

There were small changes to increase hp. There were small changes to early IH carbs in the early 50s, the cam was changed in the mid 50s and the dome top pistons in '68 and another carb change in 75.

Most of the HP came from increasing the max RPM over the years. the torque remained almost the same if I remember my research correctly.
When you only have 9 horsepower you need to know the names of all of the ponies!

jsfarmall
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Tractors Owned: 1948 Cub "Trusty"
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1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)

Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby jsfarmall » Mon Dec 03, 2018 9:40 pm

Ok, I got a 65 I September so that one won't have dome top pistons?
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby staninlowerAL » Tue Dec 04, 2018 3:25 am

jsfarmall wrote:Ok, I got a 65 I September so that one won't have dome top pistons?

I wouldn't discount anything after 50+ years. :hattip:

jsfarmall
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Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)

Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby jsfarmall » Tue Dec 04, 2018 7:09 am

This is true. I was meaning from the factory though.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

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lucky1
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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby lucky1 » Tue Dec 04, 2018 9:19 am

Scrivet wrote:Looks like the bolster has been changed since its paint doesn't match. Whoever did it may have pulled the old serial number tag off to avoid confusion. Since the bolster has been most likely changed, maybe the hood could of also? I wouldn't go by which decal it has alone, the numbers will be the answer. Speaking of hoods, is that two piece a modification or the welds just came apart?


The hood was cut. None of the newer castings were there so im thinking this was before the increase. Date was 4 10 75. Not sure why it had the zenith carb

inairam
5+ Years
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Posts: 1682
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby inairam » Tue Dec 04, 2018 9:29 am

I have seen Cubs from the 40s and 50s and 60s with the Zenith.
When you only have 9 horsepower you need to know the names of all of the ponies!

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ShawnAgne
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Re: Higher Horsepower-Trying to Identify a yellow cub without a serial number tag

Postby ShawnAgne » Tue Dec 04, 2018 8:56 pm

I have a 184 motor in my 52 Cub, the HP increase is with increased RPM mainly although does have the domed pistons I believe. When I mow with it at 2400RPM 1st gear is definitely faster and 2nd is almost like a race car. I think it cuts better as the blades go faster. I will normally mow in 1st with it wide open unless I have longer stretched then I'll do 2nd gear. Also drives on the road faster. My governor was off a little and it was actually doing 2800 RPM for awhile (mentioned in older posts). Driving it on the road in 3rd gear at 2800 RPM was rather fun.

However if the grass is long and you have to slow down you can't do that with the motor wide open, but wide open is where it cuts better. However when the grass is like that, that is why I have the 300 :)
Shawn Agne


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