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450 (2011-07) Husqvarna Chainsaw - Overview

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Chainsaw Primer Bulb – Part Number: 503936601
$30.75
In Stock
Chainsaw Primer Bulb
Part #503936601
Genuine Husqvarna replacement part, this part is sold individually. The 503939601 Air Purge does just what the part name says. It purges the air out of the carburetor. Then it forces fuel from the fuel tank and fuel line in to the carburetor.
Spark Plug – Part Number: 503235111
$11.28
In Stock
Spark Plug
Part #503235111
Compatible with over 150 models of lawn equipment, this Spark Plug has been sourced directly from the original manufacturer. It is sold individually, made of metal and ceramic components, and is not part of a kit or assembly. The spark plug is used to ignite the air-fuel mixture inside the combustion chamber. You may need to replace the Spark Plug if your 1 cylinder engine won't start, or if your more-than-1 cylinder engine runs rough. Spark Plugs will wear over time and should be inspected regularly. Customers rate this repair as Easy.
Recoil Starter Screw – Part Number: 503217321
$6.72
In Stock
Recoil Starter Screw
★★★★★
★★★★★
(1)
Part #503217321
Genuine OEM Husqvarna replacement part, this item is sold individually. This screw is used to secure the Starter Housing on the Husqvarna Chainsaws. Use a Flat head Screwdriver or a Hex Key to tighten or loosen the screw.
Chainsaw E-Ring – Part Number: 735310820
$6.72
In Stock
Chainsaw E-Ring
★★★★★
★★★★★
(1)
Part #735310820
Designed for use in various chainsaws, the E-Ring secures the pivot pin, which holds the handguard. It is an authentic OEM replacement part made of durable black metal and sold individually, not as part of a kit or assembly. When this part malfunctions, you may notice the handle or handguard is loose. At which point, it will need to be replaced. To complete this repair, you will need a pair of pliers. Customers rate this repair as Easy.
Front Handle – Part Number: 505422601
$20.85
In Stock
Front Handle
Part #505422601
This replacement front handle is a genuine OEM sourced item that is specially designed for Husqvarna chainsaws. This is the handle that provides user with a comfortable grip for the safe operation of the tool. It is made from durable black plastic and it is sold individually. Please note that the hardware to secure this front handle is sold separately.
Screw – Part Number: 503217520
$6.72
In Stock
Screw
Part #503217520
This is an authentic Husqvarna replacement screw that is commonly used on a variety of chainsaws, trimmers and brushcutters. It is a standard hardware which has multiple applications depending on your tool. Always make sure to check appropriate diagrams for correct location and use of this part. Please note, this screw has a hex socket head and it is sold individually.
Chainsaw Fuel Filter – Part Number: 591375401
$13.15
In Stock
Chainsaw Fuel Filter
Part #591375401
This is a genuine Husqvarna replacement part, it is sold individually. The Fuel Filter is inside of the fuel tank. Its purpose is to filter out dirt and other debris from contaminating the carburetor. It will at sometime become clogged and restrict the fuel getting to the carburetor,and will have to be replaced. We do have an article and video on How to Replace the Fuel Filters in Your Outdoor Power Equipment.. You can see this by going to the front page of our site and clicking on Repair Center.
Chainsaw Pump Piston – Part Number: 540057901
$10.95
In Stock
Chainsaw Pump Piston
Part #540057901
It is a high-quality OEM item which is made for Husqvarna and Jonsered chainsaws. The piston is secured inside the cylinder in order to create pressure and push the oil. Over time due to friction and heat, it may wear out or even get damaged eventually requiring a replacement to maintain a properly working oil pump. Note, never use waste oil. This results in damage to the oil pump, the bar, and the chain. It is also important to use oil of the right grade (suitable viscosity range) in accordance with the air temperature. Make sure to refer to the owners manual and the appropriate diagrams of your model for the correct installation of the new part. You will need to use appropriate tools in order to remove the chain, the bar, and the sprocket in order to perform this repair. This pump piston is made of durable materials and is sold as an individual component. Keep in mind, other parts of the oiler mechanism are all sold separately.
Trimmer Check Valve – Part Number: 530026119
$7.65
In Stock
Trimmer Check Valve
Part #530026119
This check valve, also known as a one-way valve, is a genuine OEM part that regulates the flow of fuel/oil in the equipment engine to prevent it from flowing backwards. It is made of plastic and designed for use in a variety of lawn and garden power equipment. If the valve is jammed, worn down, or contaminated with dirt and debris, it will be unable to open and close properly, thus restricting the flow of fuel and compromising the engine combustion process. You will likely notice fuel leaks around the carburetor, engine stalling, hard starting, and overall lower performance from your equipment. To remove the faulty valve, carefully disconnect any hoses or fasteners connected to it. Place the new valve in position and secure it appropriately.
Chainsaw Starter Rope – Part Number: 505305125
$12.05
In Stock
Chainsaw Starter Rope
Part #505305125
Primarily used in chainsaws, this Starter Rope is an exact replacement part for hundreds of models. It is white and sold individually, not as part of a kit or assembly. The Starter Rope will need to be replaced once you notice signs of it fraying, wearing, or it breaks off. Customers rate this repair as Easy.
Clutch Drum – Part Number: 578097901
$49.45
In Stock
Clutch Drum
Part #578097901
This item has been sourced from the original manufacturer to ensure quality. The metal clutch drum is intended to be used with chainsaws from Husqvarna and Jonsered. This item is used to house the clutch and to drive the chain. The clutch expands when the saw\\\'s engine increases RPMs and this rotates the clutch drum and the sprocket catches the chain to rotate it around the bar. This item is available as an individual replacement part.
Flange Nut – Part Number: 503220001
$6.55
In Stock
Flange Nut
Part #503220001
This M8 flange nut secures the guide bar and chain assembly in place, ensuring proper alignment and safe operation of your equipment. Designed with an integrated flange and anti-slip teeth to resist loosening from vibration, it provides a reliable, secure hold during heavy use. Made from durable, corrosion-resistant steel with an M8 thread and 1.25?mm pitch, replacing a worn or missing nut helps maintain stability and dependable performance.

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Pull rope would not return
2 of 3 people found this instruction helpful.
  • Paul from Tiffin, OH
  • Really Easy
  • 15 - 30 mins
  • Screw drivers
Removed old and
Replaced with new Spring
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