Complete specifications for the Massey Ferguson MF 12 G lawn and garden tractor, transcribed from the factory operator's manual (Form No. 1448 280 M3, dated 1/74). The MF 12 G is powered by a Tecumseh HH 120 V-twin engine of 27.66 cu. in., rated at 12 hp at 3600 rpm (SAE Code J697), driving a 42 inch, 3-blade mower deck.
Capacities
| Component | U.S. | Imperial |
|---|---|---|
| Fuel Tank | 7 qts. | 5.6 qts.1 |
| Engine Crankcase | 50 ozs. | — |
| Rear Axle | 4 pts. | 3.2 pts.1 |
Dimensions
| Length | 67 inches |
|---|---|
| Height, top of steering wheel | 41-3/4 inches |
| Width | 35-1/2 inches |
| Ground Clearance | 7 inches |
| Wheel Base | 44 inches |
| Turning Radius, outside | 7-1/2 ft. |
| Front Tread | 28 inches |
| Rear Tread | 27 or 33 inches |
| Tire Size and Pressure, Front | 4.80/4.00-8, 25 psi; 16 x 6.50-8, 10-12 psi |
| Tire Size and Pressure, Rear | 6 x 12, 10-12 psi; 23 x 8.50-12, 6-8 psi |
Engine
| Make | Tecumseh |
|---|---|
| Model | HH 120 |
| Bore | 3-1/2 inches |
| Stroke | 2-7/8 inches |
| Displacement | 27.66 cu. ins. |
| Brake Horsepower | 12 hp at 3600 rpm (SAE Code J697) |
| Governed Speed, minimum | 1650-1950 rpm |
| Governed Speed, maximum | 3350-3650 rpm |
| Battery | 12 volt, 45 amp-hr. |
Ignition (Solid State)
| Spark Plug Type | Champion J-8 |
|---|---|
| Spark Plug Gap | 0.028 inch |
Mower
| Blades | 3, 15 in. long, 3/4 in. overlap |
|---|---|
| Cutting Width | 42 inches |
| Cutting Height | 1-1/2 to 3 inches (5 inches with lift lever) |
| Blade Speed | 4160 rpm at tractor engine speed of 3400 rpm |
| Mowing Speed | 3-1/2 mph, under normal conditions |
| Weight | Approx. 135 lbs. |
Notes:
1 Reproduced as printed. Both rows convert at a flattened 0.8 ratio rather than the precise 0.8327 Imperial factor: 7 U.S. quarts is 5.8 Imperial, and 4 U.S. pints is 3.3 Imperial. The same rounding shows up throughout this batch of MF manuals.
All specifications transcribed from the specifications section of the Massey-Ferguson MF 12 G operator's manual, Form No. 1448 280 M3, dated 1/74, originally published by Massey-Ferguson. Verify against your tractor's serial number before ordering parts.
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