Caterpillar
Caterpillar D343 Propulsion
300 Series
Caterpillar D343 Propulsion discontinued legacy engine. Model and horsepower range cross-checked against Caterpillar parts compatibility and legacy engine listing sources; using the upper published rating as representative power.
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- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-04
- Package route
- diesel generator sets
- Electrical Output
- 410 kW
- Cylinders
- L6
- Rated Speed
- 1,500 RPM
Caterpillar D343 Propulsion generator set context
The Caterpillar D343 Propulsion is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 410 kW / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | Caterpillar |
| Model | D343 Propulsion |
| Series | 300 Series |
| Configuration | L6, marine propulsion diesel |
| Cylinders | 6 |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | United States |
Frequently asked questions
What fuel does the Caterpillar D343 Propulsion use?
The Caterpillar D343 Propulsion is a diesel generator-set engine.
What is the cylinder configuration of the D343 Propulsion?
The Caterpillar D343 Propulsion is an inline-6 (6-cylinder) engine.
Is the D343 Propulsion still in production?
No — the Caterpillar D343 Propulsion is discontinued. Its specifications and datasheets remain archived here for reference.
Is a datasheet available for the D343 Propulsion?
Yes — an official Caterpillar datasheet for the Caterpillar D343 Propulsion can be downloaded from this page.