Tecumseh Compressor Serial Number Nomenclature

Tecumseh Compressor Serial Number Nomenclature Rating: 7,2/10 9882 reviews

Copeland Date Codes

Copeland is owned by Emerson Climate Technologies.

The first two (2) digits in the serial number are the year of manufacture, and a third alphabetical character shows the month of manufacture, according to the following code:

Copeland Month Codes
Code Month
A January
B February
C March
D April
E May
F June
G July
H August
I September
J October
K November
L December

For Example, Copeland Model No.: ZR40KC-PFV-230 with
SN: 01D1020HL was Manufactured in April 2001 (F06-008).

Bristol Date Codes

Bristol is a division of York International

Reciprocating Compressors

The breakdown of the serial number for a Bristol Reciprocating Compressor is:
Digits 1-3: Julian Date of Manufacture
Digits 3-4: Year Manufactured
Digit 6: Mfg Location - 0 or 2 = Bristol
Digits 7-11: Sequence # During Week

For Bristol Stroll Compressors, See Scroll Technologies Compressors.


For Example, the Bristol Compressor with SN: 19597011199-S
was Manufactured the 195 Day of the Year in 1997 (AC05-02).

Tecumseh Date Codes

The breakdown of Tecumseh Serial Number is:
First letter is the Month according to the table:
The next two numbers: Day of the Month
The next two numbers: year

Tecumseh Month Codes
Code Month
A January
B February
C March
D April
E May
F June
G July
H August
I September
J October
K November
L December

For Example, the Tecumseh Compressor with Date Code,
H2995, was Manufactured on August 29, 1995 (F06-019).

Scroll Technologies Compressors

Stroll Technologies was a joint venture between Carlyle Compressors (a division of Carrier) and Bristol Compressors, and the compressors were sold exclusively through these partners as the 'Millenium' for Carlye and the 'Infinity for Bristol. In September 2006, Danfoss, a Danish company purchased Stroll Technologies from Carlyle and Bristol.

The breakdown of the serial number is
Digit 1: S for Scroll Technologies
Digits 2-3: Week Manufactured
Digits 4-5: Year Manufactured
Digits 6: State (K for Arkansas)
Digits 7-11: Sequence # During Week


For Example, the Millenium Compressor with SN S3497K05252,
was Manufactured in week 34 of 1997 (F07-019).

I think we all have been fed the story once or twice that Tecumseh had no engine records and thus there is no way to accurately date a Tecumseh engine. I have been asked to give the year on a Tecumseh dozens of times. I had to answer the question again tonight and realized that I did not have the information that I do have written in a nice way. I decided to go ahead and make it easy to follow it in hopes of being able to help some folks out.

First of all, these instructions only apply to engines using a five digit serial number code. That would be a code with four numbers followed by a one letter suffix.

If it is an early engine (and I do not know when the cutoff is) it will have a long serial number, up to 8 or 9 digits. These instructions do not apply. That style would have been certainly used in the early days of the Lauson/Power Products swap to Tecumseh, up until at least the mid 1960's. There is no hidden code there. What ever we know would have to go by factory records that may or may not exist.

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If it is a post 2004 engine, the instructions will be in the next post on this thread.

We are going to find out the age of an engine using a five digit serial number code. Lets take a Tecumseh engine I have sitting on a tractor out back. It is a OH160-160039B 9289E.

We know that the OH160 is the basic model family, and 160039B is the spec number that I always need to find specific parts like carburetors, crankshafts, and similar things.

The serial number is 9289E.

The first digit is the last digit of the year of manufacture. That would be 9 in my example. That could mean 1969, 1979, 1989 or (possibly depending on when Tecumseh officially dropped this style of code) 1999. To go farther, you have to have some general knowledge of the Tecumseh engine line and model years to know the decade. If you know about when the tractor was made and know that the engine is right for the tractor, you can probably narrow that down easily. On my engine, it is a replacement on a Massey Ferguson so I'm almost out of luck. But, since I can estimate fairly accurately going by the decal style and carburetor style, I am going to take a wild guess at my OH160's year as being a 1979.

Auto loot hack rf online quest. The next three numbers is the calender date of the year. Since 1979 is not a leap year, date #289 is October 16th.

That means my engine was made on October 16th, 1979.

The letter suffix according to Tecumseh will tell you what line and shift the engine was made on. However, from what an old factory supervisor told me that letter was the production number for that day. The assembly line was small engine that they would never make more than 26 engines of a certain model and spec in a day. Assuming that is true, that means my OH160 was the 5th engine made on October 16th, 1979.

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