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.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-25
- Package route
- diesel generator sets
- Mechanical Output
- 7 kW
- Cylinders
- L1
- Displacement
- 0.668 L
- Rated Speed
- 1,500 RPM
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Hatz 1D81 overhaul & repair parts
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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 information is listed for the 1D81?
This record lists U.S. EPA Final Tier 4 for the Hatz 1D81. Confirm the exact engine family, model year, configuration and applicable manufacturer certification documents before specifying it for a regulated project. A database label does not establish certification of a complete generator package.
What is the catalog status of the Hatz 1D81?
The Hatz 1D81 is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the 1D81?
This page links reference documents for the Hatz 1D81. Check each document's title, model coverage, revision and rating conditions before using it for selection.