Hatz
Hatz 1D81
D Series
Hatz 1D81 is a 0.668 L single-cylinder naturally aspirated air-cooled diesel engine. EPA annual certification records list 6 to 7 kWm at 1800 RPM under Tier 4 Final for the 1D81 S/Z/T/U configurations. Hatz documentation identifies 1D81 separately from the 1D81C.
- Electrical Output
- 7 kW
- Cylinders
- L1
- Displacement
- 0.668 L
- Rated Speed
- 1,500 RPM
Hatz 1D81 generator set context
The Hatz 1D81 is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 7 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 | Hatz |
| Model | 1D81 |
| Series | D Series |
| Configuration | L1 Naturally Aspirated |
| Cylinders | 1 |
| Displacement | 0.668 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Air-Cooled |
| Emissions Standard | U.S. EPA Final Tier 4 |
| Certifications | U.S. EPA Tier 4 Final |
| Country of Origin | Germany |
Frequently asked questions
What fuel does the Hatz 1D81 use?
The Hatz 1D81 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 1D81?
The Hatz 1D81 is an inline-1 (1-cylinder) engine with a displacement of 0.668 L.
What emissions standard does the 1D81 meet?
The Hatz 1D81 is certified to U.S. EPA Final Tier 4 emissions standards.
Is the Hatz 1D81 still in production?
Yes — the Hatz 1D81 is a current production model.
Is a datasheet available for the 1D81?
Yes — an official Hatz datasheet for the Hatz 1D81 can be downloaded from this page.
Reference
- Canonical page
- /engines/hatz-1d81
- Last database update
- 2026-07-25
- Manufacturer files
- 1 datasheet linked
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