Doosan Serial & Model Number Guide
Every Doosan 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.
What the number means
Worked example — AD136TI:
| Part | Meaning | Detail |
|---|---|---|
AD | Application | Marine/genset AUXILIARY engine — Doosan's own marine diesel catalog lists the identical base blocks twice, once under "Marine Propulsion Engines" (L/V prefixes) and once under "Marine Auxiliary Engines" (AD prefix); AD is the genset-use line. |
136 | Engine family number | Identifies the engine block family — NOT a literal displacement figure: Doosan's own spec table shows AD136 and AD086TI share the identical 8.1 L displacement, so don't assume the number scales directly to liters. |
TI | Aspiration | No suffix = naturally aspirated; T = turbocharged; TI = turbocharged + intercooled — confirmed row-by-row against Doosan's own "Aspiration" column. |
Using the serial number
Quote the full model designation for parts and service. "C185", also seen in our corpus, is a Doosan Portable Power towable air COMPRESSOR model (185 = its cfm rating) — not an engine displacement code, and unrelated to the AD-series scheme above. No public serial-to-build-date formula was found.
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Decode rules verified against: Doosan Infracore "Marine Diesel Engines" catalog (shipserv.com); Doosan Portable Power C185 spec sheet for the compressor-model clarification. Figures are for reference; confirm against the official documentation for your exact unit.