Kubota Serial & Model Number Guide

Every Kubota engine carries a model/serial label. Here is where to find it, what each part of the number means, and how to use it for parts, service and age.

Where to find it: the engine model and serial number stamped on the cylinder block (and on a tag near the valve cover); Kubota lists the exact spot per series. Use the model on the block — NOT the model printed on the EPA emissions label.

What the number means

Worked example — Model D1105 · Serial (7-digit from Jun 2012):

Part	Meaning	Detail
`D1105`	Engine model	Kubota engine model designation (series + displacement class).
`1st char`	Year of manufacture	First character of the serial encodes the build YEAR (rolling code).
`2nd char`	Month of manufacture	Second character encodes the build MONTH.
`rest`	Sequence	Production sequence (7-digit from Jun 2012; 6-digit before).

Using the serial number

Record BOTH the engine model and the serial from the block. Kubota is the one case here where the serial itself gives the age: on June-2012-and-later 7-digit serials the first character is the year of manufacture and the second is the month. (Don't use the model on the EPA label — use the model stamped on the block.)

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Decode rules verified against: Kubota official engine serial-number guide (engine.kubota.com). Figures are for reference; confirm against the official documentation for your exact unit.