Hi Team,
the scans below may be helpful to those searching for data on non current Caterpillar Industrial, Marine and Generator Set engines.
Some Serial Number prefixes are used for various size/model engines and it can be confusing to ID your particular engine --for a 9J prefix S/No it could be either a or a D17000, D13000, D11000, D8800, D7700 or even a D3400 for example all depending on the actual starting numerals of the S/No.
Hope this helps.
Cheers,
Eddie B.

Thank you very much, I was able to narrow down the age of my D8800 power unit.