Stihl HS 81 Product Instruction Manual - Page 22

Lubricating the Gearbox

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English Rectify problems which have caused fouling of spark plug: N Too much oil in fuel mix. N Dirty air filter. N Unfavorable running conditions, e.g. operating at part load. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. Lubricating the Gearbox Use STIHL gear lubricant for hedge trimmers (special accessory) to lubricate the blade drive gear. 1 000BA036 TR Warning! To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press spark plug boot (2) snugly onto spark plug terminal (1) of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. After about 25 hours of operation: N Remove the screw plug (1) from the gear housing on the underside of the unit. N Screw the tube of grease (2) into the filler hole. N Squeeze up to 1/4 oz (5 g) grease into the gearbox. Do not completely fill the gearbox with grease. 20 HS 81 R, HS 81 RC, HS 81 T, HS 81 TC

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HS 81 R, HS 81 RC, HS 81 T, HS 81 TC
English
20
Rectify problems which have caused
fouling of spark plug:
N
Too much oil in fuel mix.
N
Dirty air filter.
N
Unfavorable running conditions,
e.g. operating at part load.
Fit a new spark plug after approx. 100
operating hours
or earlier if the
electrodes are badly eroded.
Use STIHL gear lubricant for hedge
trimmers (special accessory) to lubricate
the blade drive gear.
After about 25 hours of operation:
N
Remove the screw plug (1) from the
gear housing on the underside of
the unit.
N
Screw the tube of grease
(2) into the
filler hole.
N
Squeeze up to 1/4 oz (5 g) grease
into the gearbox.
Warning!
To reduce the risk of fire and burn injury,
use only spark plugs authorized by
STIHL. Always press spark plug boot (2)
snugly onto spark plug terminal (1) of
the proper size. (Note: If terminal has
detachable SAE adapter nut, it must be
attached.) A loose connection between
spark plug boot and ignition wire con-
nector in the boot may create arcing that
could ignite combustible fumes and
cause a fire.
000BA036 TR
1
Lubricating the Gearbox
Do not completely fill the gearbox
with grease.