The Husqvarna 445, 445E and 450E chainsaw service and repair Starter Assembly guide will help with the repair and service of a chainsaw with a starting problem due to the starter assembly or recoil spring not working. The carburetor may just need a clean, adjustment or replacing, this guide should help with this. A Service Manual detailing the starter assembly guide as well as more complete chainsaw repair information is available to download. Also a Parts List, Operator Manual, and carburetor manual are also available to view or download as a PDF which can be read on any device or printed.
Time taken for a medium skilled person to do this is about 30 minutes to 2 hours. The repair fully Covers the following Husqvarna chainsaw models:445, 445 E and 450 E.
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- Starter assembly – removal
Fig 1
1
Undo the four bolts that fasten the starter assembly to the crankcase and lift off the starter assembly. (see figure 1)
2
Fig 2
2
1
Pull out about 30 cm of the cord and fasten it in the notch in the pulley rim. Release the tension in the return spring by letting the pulley wind backward slowly. (see figure 2)
WARNING!
If the recoil spring is still under tension when the pulley is removed it can fly out and cause injury. Wear eye protection.
3
3
Fig 3
Remove the bolt from the center of the pulley and
lift off the pulley. (see figure 3)
Cleaning and inspection
Clean the parts and check the following:
- The starter cord.
- That the pawls on the flywheel are undamaged, i.e. that they spring back towards the center and move freely.
- Lubricate the return spring with light oil.
Changing a broken or worn starter
cord
When the starter cord is worn and must be replaced, the tension on the return spring must be released.
1
Pull the cord out about 30 cm and lift it into the notch on the outside of the starter pulley. Release the tension on the return spring by allowing the starter pulley to rotate slowly backward.(see figure 2)
WARNING!
If the spring tension is activated on the starter pulley, the spring can fly out and cause personal injury. Wear protective glasses.
2
Undo the bolt in the center of the pulley and remove the pulley. (see figure 3)
3
Fit a new cord through the hole in the pulley and tie a knot to secure it. Feed the other end of the cord through the hole in the starter housing and through the starter handle, then tie a double knot in the end. Wind about 3 turns of the starter cord onto the pulley. Fit the bolt through the center of the pulley and tighten to a torque of 2–3 Nm.
Cleaning and inspection
- Clean and inspect all parts carefully. If there are any cracks or other defects replace the damaged parts with new ones. Lubricate the return spring with a little grease.
Fig 4
Tensioning the recoil spring
1
Fasten the starter cord in the notch in the pulley rim and wind the pulley about 3 turns clockwise. Check that the pulley is free to rotate at least another half turn when the starter cord is fully extended. (see figure 4)
2
Fig 5
Tension the cord with the handle. Remove the
thumb and released back the cord (see figure 5)
Replacing a worn recoil spring
WARNING!
Make sure the recoil spring does not fly out and cause injury. Wear eye protection..
1
Remove the bolt from the center of the pulley and lift off the pulley and spring cassette.
2
Replace the defective spring cassette with a new one.
3
Fit the bolt through the center of the pulley and tighten to a torque of 2–3 Nm.
Tension the recoil spring, see “Tensioning the recoil spring”.
Fig 6
Starter assembly – refitting
1
Position the starter assembly on the crankcase and tighten the bolts to a torque of 2.5–3.5 Nm.
Starter Assembly replacement and repair for Husqvarna 445 445e 450e chainsaw