SD-40 date help (1 Viewer)

[Indygbd]

Okay, calling all of you sd-40 carb dating experts. I need some help dating this one.

See photos.

 

[B y r o n]

This may help.

Or this.

 

[middlecalf]

Not an expert, but I can guess. My first guess is Oct. 1, 1959. My second guess is Sept. 18, 1966. The color of the body tells me post-64, but the S/N format is not familiar to me. And it looks almost restamped.

 

[Indygbd]

Not an expert, but I can guess. My first guess is Oct. 1, 1959. My second guess is Sept. 18, 1966. The color of the body tells me post-64, but the S/N format is not familiar to me. And it looks almost restamped.

That’s where I struggled. I purchased it from overseas. When I saw the date markings I was confused. I’m used to the 3 letter ones.

 

[jblatz]

Based on the first post in Jim C's thread, that is a pre-63 carb:

Date code carb identification

This is the first in a series of threads regarding how to identify production date of various Cruiser components. Toyota (Aisan) carburetors from ~1963-present have a date code stamped on them. It is stamped in small letters on the top front of the carb. The format is Y M DD. Y is the...

forum.ih8mud.com

treerootCO has several early examples in his thread:

Aisan SD40 Big Window Carburetor

1958 - 1966 I wanted to put all of this information in one place and add the FJ25 specific information with everyone's help. The float is 21209-60010 and still available. DO NOT dip the entire carb to get the glass window off. The Aisan window is blue on the early ones and the carb dip will...

forum.ih8mud.com

examples include:
JA8545 - 1960 FJ25, post #5
JA9186 - your's
JA9785 - post #38
H0370 - post #44

The first digit after the alpha would appear to be the year 8=1958, 9=1959, 0=1960
The next 3 digits don't seem to fit a month/day or week number format.
Perhaps the 2nd digit is the month, followed by a 2-digit lot number.

 

[Indygbd]

Based on the first post in Jim C's thread, that is a pre-63 carb:

Date code carb identification

This is the first in a series of threads regarding how to identify production date of various Cruiser components. Toyota (Aisan) carburetors from ~1963-present have a date code stamped on them. It is stamped in small letters on the top front of the carb. The format is Y M DD. Y is the...

forum.ih8mud.com

treerootCO has several early examples in his thread:

Aisan SD40 Big Window Carburetor

1958 - 1966 I wanted to put all of this information in one place and add the FJ25 specific information with everyone's help. The float is 21209-60010 and still available. DO NOT dip the entire carb to get the glass window off. The Aisan window is blue on the early ones and the carb dip will...

forum.ih8mud.com

examples include:
JA8545 - 1960 FJ25, post #5
JA9186 - your's
JA9785 - post #38
H0370 - post #44

The first digit after the alpha would appear to be the year 8=1958, 9=1959, 0=1960
The next 3 digits don't seem to fit a month/day or week number format.
Perhaps the 2nd digit is the month, followed by a 2-digit lot number.

Thanks for that information.