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Microcosm M81: compact brass steam engine
The M81 is a small model steam engine for enthusiasts who want to study a moving piston and flywheel in a compact mechanical build. It is sold as an engine only: a boiler, steam supply, fuel, burner, tubing and any required fittings are not included. Do not buy it expecting a self-contained running steam plant.
At a glance
- Engine size: approximately 47 × 29 × 46 mm
- Engine weight: approximately 66 g
- Primary material: brass
- Package: one M81 mini steam engine; no boiler or fuel
Who this model suits
Choose the M81 if you already have a suitable model steam supply or are planning a carefully matched miniature steam setup. Its tiny footprint makes the mechanism easy to display and compare with larger model engines. If you want a ready-to-run set with a boiler and burner, choose a complete steam engine kit instead.
Before you connect steam
- Confirm that your steam source, connections and operating conditions are compatible with the manufacturer’s instructions. No operating pressure is asserted here because the supplied product listing does not establish a safe system-level rating.
- Use appropriate heat-resistant tubing and secure connections. Keep hands clear of hot metal, moving parts and exhaust.
- Operate only under adult supervision in a ventilated area, away from flammable materials. Never use an improvised boiler or leave a heated steam setup unattended.
- Allow the entire system to cool before disconnecting or cleaning.
Important: Image accessories or display props are not included unless explicitly listed above. Product dimensions are approximate; check fit before purchase. For exact compatibility with your existing boiler, contact EnginesDIY before ordering.