Husqvarna
Gas Chainsaw

Model #450 Husqvarna chainsaw

Here are the diagrams and repair parts for Husqvarna 450 chainsaw, as well as links to manuals and error code tables, if available.


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Save to my profileOwner’s manual

    Showing 10 of 179 parts

    Chainsaw Primer Bulb

    #11

    Carburetor & air filter Diagram

    Chainsaw primer bulb

    Part #503936601
    $9.97 | 
    9% OFF MSRP:$11.00

    In Stock

    Chainsaw Oil Pump

    #6

    Clutch & oil pump Diagram

    Chainsaw oil pump

    Part #540057901
    This item is not returnable
    $5.11

    In Stock

    Chainsaw Recoil Starter Rope

    #8

    Starter Diagram

    Chainsaw recoil starter rope

    Part #505305125
    This item is not returnable
    $5.23

    In Stock

    Lawn & Garden Equipment Screw

    #20

    Crankcase Diagram

    Lawn & garden equipment screw

    Part #503217010
    This item is not returnable
    $2.49 | 
    17% OFF MSRP:$3.00

    In Stock

    Handle Insert

    #7

    Fuel tank Diagram

    Handle insert

    Part #504122201
    This item is not returnable
    $5.44

    In Stock

    Lock Out Spring

    #5

    Fuel tank Diagram

    Lock out spring

    Part #544099901
    This item is not returnable
    $2.49 | 
    22% OFF MSRP:$3.20

    In Stock

    Chainsaw Clutch

    #1

    Clutch & oil pump Diagram

    Chainsaw clutch

    Part #537110503
    $35.22 | 
    7% OFF MSRP:$38.00

    In Stock

    Wear Protector

    #11

    Chain brake & clutch cover Diagram

    Wear protector

    Part #544083001
    This item is not returnable
    $2.49 | 
    64% OFF MSRP:$7.00

    In Stock

    Lawn & Garden Equipment Screw

    #5

    Starter Diagram

    Lawn & garden equipment screw

    Part #503212810
    This item is not returnable
    $2.69

    In Stock

    Chainsaw Fuel Line

    #9

    Fuel tank Diagram

    Chainsaw fuel line

    Part #544128601
    $12.59

    In Stock

    Symptoms for gas chainsaws

    Choose a symptom to see related chainsaw repairs.

    Main causes: cracked fuel lines, leaky carburetor seals, damaged fuel tank cap, cracked fuel tank
    Main causes: stale gasoline, cracked fuel lines, dirty carburetor, damaged spark plug, worn piston rings
    Main causes: bad gas, engine needs tune up, cracked fuel lines, dirty carburetor

    Repair guides for gas chainsaws

    These step-by-step repair guides will help you safely fix what’s broken on your chainsaw.

    February 1, 2014
    By Lyle Weischwill
    How to rebuild a chainsaw carburetor

    If your chainsaw isn't running well, a dirty carburetor could be the problem. You can take it apart, clean it and rebuild it, using a carburetor rebuild kit. This repair guide takes you through the process.

    Repair difficulty
    Time required
     15 minutes or less
    February 1, 2014
    By Lyle Weischwill
    How to replace a chainsaw carburetor

    If the engine won't start even though there's fuel in the chainsaw, the carburetor could be the problem. Sometimes, it's easier to replace the carburetor than to clean it and rebuild it. Follow these steps to do the job yourself in about half an hour.

    Repair difficulty
    Time required
     15 minutes or less
    February 1, 2014
    By Lyle Weischwill
    How to replace chainsaw fuel lines

    The fuel line on a chainsaw becomes brittle over time and can crack. Replacing it doesn't require a lot of DYI experience. These instructions show you how.

    Repair difficulty
    Time required
     15 minutes or less

    Articles and videos for gas chainsaws

    Use the advice and tips in these articles and videos to get the most out of your chainsaw.

    June 1, 2016

    Chainsaw care and troubleshooting tips

    By Sears PartsDirect staff

    Learn the basics of taking care of your chainsaw and solving common problems.

    March 1, 2016

    How to sharpen a chainsaw

    By Jeff Day

    Find out how to sharpen a chainsaw.

    May 1, 2015

    5 tips for a hard-to-start chainsaw

    By Sears PartsDirect staff

    These tips may help you get your hard-to-start chainsaw running.