The Husqvarna L77 chainsaw was a powerful and reliable tool manufactured by Husqvarna Vapenfabriks AB. It was part of the series or assembly numbers 70, 70E, and 70F and was first introduced in 1963. With an engine displacement of 70cc (4.27 cu. in.), the L77 chainsaw was capable of delivering 4 horsepower, making it a popular choice among professionals in the forestry industry.
Constructed with die-cast magnesium, the L77 was both sturdy and lightweight, weighing 8.5 kg. It featured a rigid handlebar system, centrifugal clutch, and a direct drive type. The L77 had an automatic rewind starter type, and an automatic oil pump, making it easy to start and operate.
The chainsaw had a maximum engine RPM of 6,400 and was fueled by a 700 ml fuel tank. It used a 25:1 fuel oil ratio and regular octane fuel. The L77 chainsaw had a .404 in. chain pitch and was compatible with guide bars ranging from 33 cm (13 in.) to 45 cm (18 in.) in length.
Although the Husqvarna L77 chainsaw was a favorite of professionals in the forestry industry, it was eventually discontinued a year after its first production.
Specifications Chart
| SPECIFICATION | DETAILS |
|---|---|
| Manufactured by | Husqvarna Vapenfabriks AB |
| Series or assembly number | 70, 70E, 70F |
| Year introduced | 1963 |
| Year discontinued | 1964 |
| Engine displacement | 70cc (4.27 cu. in.) |
| Cylinder bore | 45 mm |
| Piston stroke | 44 mm |
| Cylinder type | Aluminum with chrome plated bore |
| Intake method | Piston ported |
| The manufacturer advertised H.P. | 4 hp |
| Weight | 8.5 kg |
| Handlebar system | Rigid |
| Chain brake | none |
| Clutch | Centrifugal |
| Drive Type | Direct |
| Construction | Die-cast magnesium |
| Magneto type | Bosch |
| Carburetor | Tillotson HL series |
| Air filter system | Nylon mesh cartridge |
| Starter type | Automatic rewind |
| Oil pump | Automatic |
| Maximum engine RPM | 6,400 |
| Breaker point setting | 0.4 mm (0.016 in.) |
| Flywheel/coil air gap | Position is fixed |
| Spark plug type | Bosch W 175 T1 |
| Spark plug gap | 0.5 mm (0.020 in.) |
| Crankshaft main bearings | Ball |
| Fuel tank capacity | 700 ml |
| Fuel oil ratio | 25:1 |
| Recommended fuel octane | Regular |
| Mix oil specification | Two-cycle mix oil |
| Chain pitch | .404 in. |
| Bar mount pattern | 17 link |
| Shortest guide bar supplied | 33 cm (13 in.) |
| Longest guide bar supplied | 45 cm (18 in.) |
| Color scheme | Husqvarna Orange and Black Enamel |
In conclusion, the Husqvarna L77 chainsaw was a powerful and reliable tool introduced in the early 1960s by Husqvarna Vapenfabriks AB. With a 70cc engine displacement, aluminum chrome plated bore cylinder, and automatic oil pump, this chainsaw was designed to handle heavy-duty tasks with ease. It boasted a rigid handlebar system, a direct drive type, and a centrifugal clutch, making it a popular choice among professionals and DIYers alike.
Although it was discontinued after just one year after production, the Husqvarna L77 left a lasting impression on the chainsaw industry, and its legacy lives on to this day.