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Checking chain lubrication
•
Check the chain lubrication each time you refuel. See
instructions under the heading Lubricating the bar tip
sprocket.
Aim the tip of the bar at a light coloured surface about
20 cm (8 inches) away. After 1 minute running at 3/4
throttle you should see a distinct line of oil on the light
surface.
If the chain lubrication is not working:
•
Check that the oil channel in the bar is not obstructed.
Clean if necessary.
•
Check that the groove in the edge of the bar is clean.
Clean if necessary.
•
Check that the bar tip sprocket turns freely and that
the lubricating hole in the tip sprocket is not blocked.
Clean and lubricate if necessary.
If the chain lubrication system is still not working after
carrying out the above checks and associated measures
you should contact your servicing dealer.
1151081-49 Rev.2 2008-02-27
GENERAL SAFETY PRECAUTIONS
Chain drive sprocket
The clutch drum is fitted with one of the following drive
sprockets:
A Spur sprocket (the chain sprocket is welded on the
drum)
B Rim sprocket (replaceable)
Regularly check the degree of wear on the drive sprocket.
Replace if wear is excessive. Replace the drive sprocket
whenever you replace the chain.
Needle bearing lubrication
Both versions of sprockets have a needle bearing on the
drive shaft, which has to be greased regularly (once a
week). CAUTION! Use only high quality bearing grease or
engine oil.
See instructions under the heading Maintenance, Needle
bearing lubrication.
Checking wear on cutting equipment
Check the chain daily for:
•
Visible cracks in rivets and links.
•
Whether the chain is stiff.
•
Whether rivets and links are badly worn.
Replace the saw chain if it exhibits any of the points
above.
We recommend you compare the existing chain with a
new chain to decide how badly the existing chain is worn.
When the length of the cutting teeth has worn down to
only 0.16 inch (4 mm) the chain must be replaced.
–
English
15
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Do you have a question about the 450 e-series and is the answer not in the manual?
Questions and answers
my Husqvarna 450 starts, revs up and dies. The carb is rebuilt, new fuel , new filter ,tank full. Carb settings L&H at 1 1/2 turns open.
Your Husqvarna 450 e-series may start, rev up, and then die due to several possible issues:
1. Carburetor Adjustment – The manual mentions that carburetor adjustment may be necessary when changing fuel types. If the carburetor is not properly tuned, the engine may not receive the correct fuel-air mixture, causing it to stall.
2. Fuel Quality – Ensure that the fuel is mixed properly and is not older than one month. Stale fuel can cause poor engine performance.
3. Air Filter Condition – A damaged or clogged air filter can restrict airflow, leading to improper combustion and engine stalling.
4. Spark Plug Issues – Ensure the spark plug (NGK BPMR 7A or Champion RCJ 7Y) is in good condition and has the correct electrode gap (0.5 mm). A faulty spark plug can cause misfires and engine shutdown.
5. Idle Speed Setting – If the idle speed is set too low (should be 2500-2700 rpm), the engine may not maintain idle and could stall.
6. Fuel Line or Vent Blockage – A blocked fuel line or tank vent could prevent proper fuel flow, leading to engine stalling.
Check these factors and adjust as needed to resolve the issue.
This answer is automatically generated