The Engine Block Assembly,gasoline, cataloged under National Stock Number 2805-00-491-3264, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Wisconsin Motors, Llc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-491-3264 |
| Primary Part Number | AA97S31 |
| Item Name | Engine Block Assembly,gasoline |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Wisconsin Motors, Llc |
| Status | ACTIVE |
| Strokes Per Cycle | 4 |
| Closed System Hull Cooling Feature | NOT INCLUDED |
| Stroke Length | 5.000 INCHES NOMINAL IN |
| Flywheel | NOT INCLUDED |
| Cooling Method | AIR |
| Valve Arrangement for Which Designed | L |
| Crankshaft Rotation Direction | CLOCKWISE |
| Direct Raw Water Cooling Feature | NOT INCLUDED |
| Cylinder Quantity | 1 |
| Cylinder Arrangement | VERTICAL SINGLE CYLINDER |
| Supercharger Usage Feature | NOT PROVIDED |
| Bore Diameter | 2.750 INCHES NOMINAL IN |
| Flywheel Housing | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AA97S31 PRIMARY | Wisconsin Motors, Llc (USA) |
| Reference | Meaning |
|---|---|
| AA97S1 | 5/9 Secondary reference Wisconsin Motors, Llc |
| 97A81 | 5/9 Secondary reference Wisconsin Motors, Llc |
NSN 2805-00-491-3264 is a Engine Block Assembly,gasoline, manufactured by Wisconsin Motors, Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-491-3264 has 1 manufacturer part number on file: AA97S31 (Wisconsin Motors, Llc).
Key specifications for AA97S31: Strokes Per Cycle: 4; Closed System Hull Cooling Feature: NOT INCLUDED; Stroke Length: 5.000 INCHES NOMINAL IN; Flywheel: NOT INCLUDED. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.