If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
:
Remove spark plug - see "Starting /
Stopping the Engine".
:
Clean dirty spark plug.
:
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
:
Use only resistor type spark plugs
of the approved range.
Rectify problems which have caused
fouling of spark plug:
:
Too much oil in fuel mix.
:
Dirty air filter.
:
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.
FC 85
1
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 boot 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.
English / USA
Lubricating the
Gearbox
1
:
Check grease level regularly –
about every 25 hours of operation.
:
Unscrew the filler plug (1).
:
If no grease can be seen on the
inside of the filler plug, screw the
tube of grease (2) – see "Special
Accessories" – into the filler hole.
:
Squeeze up to 1/5 oz (5 g) grease
into the gear housing.
Do not not completely fill the gear
housing with grease.
:
Refit the filler plug and tighten it
down firmly.
2
25