Twin-plug heads
Safety-wired stud nuts, cast head number, and two independent plugs per cylinder fed from separate FADEC channels.
M120
A 1,340 cc liquid/air-cooled flat-four with dual-channel FADEC and a 2.43:1 reduction drive. Designed for flight schools and first-time builders: mogas-compatible, field-serviceable, every part number priced in the open book.
- Role
- Baseline flat-four
- Status
- Shipping — serial 0341 and counting
- Spec rev
- F
- Catalogue lines
- 37
DRY MASS 62.4 KGTBO 2 000 HPOWER 120 HPFUEL MOGAS 91E10
Look closer
Captured from the same scene you can orbit above.
Induction
Machined trumpets in a cast plenum, one throttle body, hose-clamped runners into each head. Nothing to lean, nothing to ice.
Crankcase
Vertically split, through-bolted, sand-cast in Bristol. The cast part number is on the sump flank where a mechanic can read it.
Specification and price
M120 type dataSPEC REV F
- Configuration
- Flat-four, horizontally opposed
- Displacement
- 1,340 cc
- Max power
- 120 hp @ 5,500 rpm
- Cruise power (75%)
- 90 hp @ 4,900 rpm
- Reduction drive
- 2.43 : 1 helical, torsional damper
- Dry mass
- 62.4 kg
- TBO
- 2,000 h
- Fuel
- 91E10 mogas / UL91 / 100LL
- Fuel burn (75%)
- 17.1 L/h
- Cooling
- Liquid-cooled heads, air-cooled barrels
- Ignition & injection
- Dual-channel FADEC, auto altitude compensation
- Alternator
- 600 W integrated PM, dual regulators
- Propeller flange
- SAE-1 / hydraulic governor pad optional
Price, firewall-forwardEX-WORKS FILTON
$24,800
Firewall-forward, ex-works Filton
Power and torque, measured on the cellCELL DATA
PowerTorque
Installation
Firewall-forward, side elevation.
Installation drawingM120-FWF
Envelope and mount
Overall envelope 612 × 782 × 542 mm. Dynafocal mount ring, SAE-1 flange, standard cowl lines published as DXF in the installation manual. Every hose, clamp and adapter in the firewall-forward kit is a catalog line item.
Full installation drawings, mount loads and CG tables are in the Installation Manual (Rev E) — free, like all our documentation.
Get the manuals
Parts for the M120
Full parts book| Part no. | Description | Group | Price |
|---|---|---|---|
| MA-000-1101 | Crankshaft, forged EN40B, nitrided | Core | $1,840 |
| MA-000-1103 | Connecting rod, forged, matched pair | Core | $386 |
| MA-000-1106 | Piston, forged 2618 alloy, with rings & pin | Core | $214 |
| MA-000-1110 | Main bearing set, trimetal, std | Core | $172 |
| MA-000-1114 | Crankcase half, sand-cast A356-T6, left | Core | $940 |
| MA-000-1115 | Crankcase half, sand-cast A356-T6, right | Core | $940 |
| MA-000-1121 | Camshaft, billet, with followers | Core | $610 |
| MA-000-2102 | Cylinder barrel, air-cooled, plateau-honed | Cylinder & Head | $452 |
37 catalog lines fit the M120. All priced, all orderable.