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• Adjust the chain tension by a tension screw so that the chain is not slack but it can still move
freely forward and backward on the bar. (For more details, see chapter Chain adjustment
and tensioning) (fig. 5)
• Tighten the nuts (12–15 Nm). Then test whether the chain moves freely.
Note: I
A new chain becomes longer during use. Therefore, check and adjust the chain
tension regularly. Improper chain tensioning results in increased wear of the chain and bar
friction parts and in reduced cutting performance.
HOLDING THE CHAINSAW
In spite of all the protective elements, tools and equipment, the correct way of holding
the chainsaw can be described as the most important safety element when working with
the chainsaw. ALWAYS HOLD THE CHAINSAW FIRMLY WITH BOTH HANDs with your left
hand holding the front handle and your right hand the rear handle. Never hold the chainsaw
the other way around! Left-hand option chainsaws are not produced!
Always try to hold the chainsaw in such a way that your left hand is covered by the front hand
guard. It does not only have the function of a brake, but it is also a protector that prevents
contact with the chain when it slips out. In the case of a "side" holding of the chainsaw not only
that your left hand is not protected by the guard but there is also nothing to activate the chain
brake. Therefore, in case of a kickback, there is no safety element to protect you from a contact
with the spinning chain.
WARNING! B
NEVER HOLD ANY CHAINSAW WITH ONE HAND ONLY WHILE WORKING!
FILLINGS
To run the chainsaw, it is necessary fill it with fuel and chain oil which is used to lubricate
the contact surfaces of the chain and bar. ‘Dry’ running of the chain would permanently
damage both the bar and the chain. Chain oil is driven into the bar when the engine is rotating.
This is the so-called loss lubrication because you actually spill oil in small doses directly into
the environment. Therefore, it is good to think ecologically and use biodegradable oils to
lubricate the chain.
FUEL MIXTURE
WARNING! B
Petrol is highly flammable and explosive. You can be seriously burned or injured
while refilling with it.
C The machine is equipped with a two-stroke engine and must be operated exclusively
with a mixture of petrol and oil for high-speed two-stroke engines in the ratio of
40:1. Never use just petrol!
HECHT_925_R_MANUAL_2022_EN.indd 25HECHT_925_R_MANUAL_2022_EN.indd 25 28.03.2023 11:58:0328.03.2023 11:58:03
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