Jonsered 70C 用户手册
English
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MAINTENANCE
CAUTION! There is an integrated speed governor in the
ignition system that limits the maximum speed to 13600 rpm.
The maximum speed will not exceed 13600 rpm when the
high speed jet is adjusted (screwed in). When the speed
governor is activated, you will get the same sound experience
as when the chain saw 4-cycles.
ignition system that limits the maximum speed to 13600 rpm.
The maximum speed will not exceed 13600 rpm when the
high speed jet is adjusted (screwed in). When the speed
governor is activated, you will get the same sound experience
as when the chain saw 4-cycles.
To adjust the carburettor correctly you should contact a
mechanic with access to a rev counter.
mechanic with access to a rev counter.
CAUTION! As the spark is cut off, the rev counter does not
show speeds higher than 13600 rpm.
show speeds higher than 13600 rpm.
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine
accelerates without hesitation and the machine 4-cycles a
little at max speed. It is also important that the chain does not
rotate at idle. If the L-jet is set too lean it may cause starting
difficulties and poor acceleration. If the H-jet is set too lean
the machine will have less power, poor acceleration and could
suffer damage to the engine.
accelerates without hesitation and the machine 4-cycles a
little at max speed. It is also important that the chain does not
rotate at idle. If the L-jet is set too lean it may cause starting
difficulties and poor acceleration. If the H-jet is set too lean
the machine will have less power, poor acceleration and could
suffer damage to the engine.
Starter
Changing a broken or worn starter cord
•
Loosen the screws that hold the starter against the
crankcase and remove the starter.
crankcase and remove the starter.
•
Pull out the cord approx. 30 cm and hook it into the notch
in the rim of the pulley. Release the recoil spring by letting
the pulley rotate slowly backwards.
in the rim of the pulley. Release the recoil spring by letting
the pulley rotate slowly backwards.
•
Undo the screw in the centre of the pulley and remove the
pulley. Insert and fasten a new starter cord to the pulley.
Wind approx. 3 turns of the starter cord onto the pulley.
Connect the pulley to the recoil spring so that the end of
the spring engages in the pulley. Fit the screw in the
pulley. Insert and fasten a new starter cord to the pulley.
Wind approx. 3 turns of the starter cord onto the pulley.
Connect the pulley to the recoil spring so that the end of
the spring engages in the pulley. Fit the screw in the
centre of the pulley. Insert the starter cord through the
hole in the starter housing and the starter handle. Make a
secure knot in the end of the starter cord.
hole in the starter housing and the starter handle. Make a
secure knot in the end of the starter cord.
Tensioning the recoil spring
•
Hook the starter cord in the notch in the pulley and turn
the starter pulley about 2 turns clockwise.
the starter pulley about 2 turns clockwise.
CAUTION! Check that the pulley can be turned at least a
further 1/2 turn when the starter cord is pulled all the way
out.
further 1/2 turn when the starter cord is pulled all the way
out.
Changing a broken recoil spring
•
Lift off the pulley. See instructions under heading
Changing a broken or worn starter cord.
Changing a broken or worn starter cord.
•
Remove the recoil spring from inside the pulley by tapping
the pulley lightly with its inside face downwards against a
work bench or the like. If the spring pops out during fitting,
wind it up again, working from the outside in towards
centre.
the pulley lightly with its inside face downwards against a
work bench or the like. If the spring pops out during fitting,
wind it up again, working from the outside in towards
centre.
•
Lubricate the recoil spring with light oil. Fit the pulley and
tension the recoil spring.
tension the recoil spring.
!
WARNING! When the recoil spring is wound
up in the starter housing it is under tension
and can, if handled carelessly, pop out and
cause personal injury. Always be careful
when changing the recoil spring or the
starter cord. Always wear protective
goggles.
up in the starter housing it is under tension
and can, if handled carelessly, pop out and
cause personal injury. Always be careful
when changing the recoil spring or the
starter cord. Always wear protective
goggles.