Starting Engine; Carburetor; Fuel Filter - Jonsered 49 SP Manual Manual

Starting the engine
Read about "Fuel mix" and "Chain lubrication" on page
3 before filling the tanks with fuel mixture and chain
lubrication oil.
See that the ignition switch is not in the "Stop" position.
Place the saw on the ground. Make sure that no stones
or twigs are in contact with the chain.
Pull out the choke control (1) all the way. Press down the
safety catch (2) and squeeze the throttle trigger (3). Lock
the trigger in this position with the throttle catch (4).
Insert your foot in the rear handle. Pull out the starter
rope about 4 inch (10 em) until the starter pawls engage.
Pull the starter handle with a smooth, rapid stroke.
Push the choke control in as soon as the engine fires. Then
pull the starter handle again to start the engine.
When the engine starts, squeeze the throttle trigger to
release the throttle catch, and the engine runs at idle
speed.
To start a warm engine, leave the choke control pushed
in and the throttle trigger in idle position.
Carburetor
Fuel adjustment is made with three screws (H, Land T).
H=High speed fuel adjustment needle.
L =Low speed fuel adjustment needle.
T
=
Idle speed adjustment screw.
Rough adjustment. Carefully turn the fuel adjustment
needles Hand L all the way in, then back them up one
full turn (counter-clockwise).
Caution! Do not attempt to twist the needles too hard
since this could damage the needles and their seats beyond
repair.
Fine adjustment. Start the engine. Adjust to correct idle
speed by turning the idle screw (T) until the engine idles
as fast as possible without the chain moving. There must
always be a safe margin between engine idle speed and
clutch engagement speed.
If the engine falters or hesitates to accelerate when the
throttle is quickly squeezed, slowly turn the low speed
needle (L) counter-clockwise in small steps, checking the
acceleration. The setting of the high speed needle (H) also
mfects acceleration. For good idle, do not open the low
speed needl~ (L) more than necessary.
If the engine tends to race, open the high speed needle
(H) slightly (i.e. turn counter-clockwise), Smoky exhaust
gases indicate too rich a setting. After final adjustments,
the needle (H) must be at least
*
turn from. the bottom,
and the needle (L) at least I turn from the bottom. A
leaner setting results in the engine racing and possible
seizing.
Note. Always make sur.e that the air filter is clean before
carrying out carburetor adjustments.
,
Fuel filter
On the end of the gasoline hose inside the tank thet:e is a
plummet which also functions as a fuel filter. For cleaning
or replacement, pull out the plummet through the fuel
tank filler opening.