the guide bar.
Never starve the bar and chain of lubricating oil. Run-
ning the saw dry or with too little oil will decrease cut-
ting efficiency, shorten saw chain life, cause rapid
dulling of chain, and lead to excessive wear of bar
from overheating. Too little oil is evidenced by smoke
or bar discoloration.
Chain Sharpening
m NOTE!: For smooth and safe operation, it is im-
portant that the chain is always sharp. The chain
should be sharpened when:
• Wood shavings are dust-like.
• You have to expend extra power sawing.
• The saw cut is not straight.
• The vibration increases.
• Fuel consumption increases.
m NOTICE
We recommend that a professional sharpen the
chain.
Instructions for sharpening a saw chain:
File diameter
Chainsaw type
91P
ca. 4.0 mm
Upper angle
Chucking rotation
angle
inclination angle
30°
depth stop
Upper tilt angle
lower angle
(55 °)
Chucking
side angle
0°
80°
Standard depth
0.64 mm
file
47 І 164