Specifications of the Stihl 025 Chain Saw

Engine

• The 025 is powered by a one-cylinder, two-stroke gasoline engine. The piston bore (diameter) is 1.7-inches (42.0 mm), and the piston stroke is 1.26-inches (32.0 mm). The engine has an overall displacement of 2.77 cubic inches (45.4 cubic centimeters).

Ignition

• The chainsaw operates using breakerless electronic magneto ignition. The unit is factory equipped with either a Bosch WSR 6 F or NGK BPMR 7 A spark plug gapped to 0.02-inches (0.5 mm).

Oil and Fuel Capacities

• Stihl designed the 025 to operate using gasoline with a minimum octane rating of 87. The capacity of the fuel tank is 16 oz. (0.47 L). The chain oil reservoir has a capacity of 6.4 oz. (0.20 L). The gasoline-to-2-cycle oil mixing ratio is 50:1 (2 percent). A speed-controlled fully automatic plunger-type oil pump provides guide bar lubrication.

Weight, Carburetor and Air Filter

• The 025 is equipped with an all-position diaphragm carburetor fitted with an integrated fuel pump. Air filtration is provided by a washable flocked fabric filter element. Without the guide bar and chain, the dry weight (without fuel or chain oil) of the Stihl 025 is 10.1 lbs. (4.6 kg).