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Homelite UT20780 trimmer/brushcutter Parts

Here are the diagrams and repair parts for Homelite UT20780 trimmer/brushcutter, as well as links to manuals and error code tables, if available.

Homelite UT20780 trimmer/brushcutter
By Schematic
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Browse Parts forUT20780 Line Trimmers

  • Flex Shaft for Homelite UT20780 - Part UP03031

    Flex Shaft

    Part #UP03031
    In Stock
    $36.16
    Minus Item
    Qty
    Plus Item
  • Lead for Homelite UT20780 - Part UP04690

    Lead

    Part #UP04690
    In Stock
    $25.22
    Minus Item
    Qty
    Plus Item
  • Ring for Homelite UT20780 - Part UP03838

    Engine internal diagram

    Ring

    Part #UP03838
    In Stock
    $29.08
    Minus Item
    Qty
    Plus Item
  • Washer for Homelite UT20780 - Part 638090001

    Washer

    Part #UP04275

    Replaced by #638090001

    Info Icon
    Manufacturer substitution
    This part replaces UP04275. Substitute parts can look different from the original.
    In Stock
    $25.57
    Minus Item
    Qty
    Plus Item
  • Housing,rear for Homelite UT20780 - Part 984633001

    Svc Rear H

    Part #UP02964

    Replaced by #984633001

    Info Icon
    Manufacturer substitution
    This part replaces UP02964. Substitute parts can look different from the original.
    In Stock
    $10.37
    Minus Item
    Qty
    Plus Item
  • Starter Comp for Homelite UT20780 - Part UP02962A

    Starter Assembly

    Part #UP02962

    Replaced by #UP02962A

    Info Icon
    Manufacturer substitution
    This part replaces UP02962. Substitute parts can look different from the original.
    In Stock
    $39.89
    Minus Item
    Qty
    Plus Item
  • Lead,electri for Homelite UT20780 - Part PA00387

    Lead

    Part #UP03174

    Replaced by #PA00387

    Info Icon
    Manufacturer substitution
    This part replaces UP03174. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $4.34
    Minus Item
    Qty
    Plus Item
  • Cupped Washe for Homelite UT20780 - Part 04409

    Shaft/spool/string/grass deflector diagram

    Washer

    Part #UP04129

    Replaced by #04409

    Info Icon
    Manufacturer substitution
    This part replaces UP04129. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.74
    Minus Item
    Qty
    Plus Item
  • Handle Bar C for Homelite UT20780 - Part 00422

    Shaft/spool/string/grass deflector diagram

    Clamp

    Part #UP04105

    Replaced by #00422

    Info Icon
    Manufacturer substitution
    This part replaces UP04105. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Minus Item
    Qty
    Plus Item
  • Short Block for Homelite UT20780 - Part 984561001

    Short Block

    Part #UP02995

    Replaced by #984561001

    Info Icon
    Manufacturer substitution
    This part replaces UP02995. Substitute parts can look different from the original.
    In Stock
    $91.49
    Minus Item
    Qty
    Plus Item

Most common symptoms to help you fix your line trimmers

Choose a symptom to see related grass line trimmer repairs.

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Why does my gas line trimmer run rough?

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure...

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Why won't my gas line trimmer start?

Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings...

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Why does my gas line trimmer leak gas?

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank...

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Repair guides for gas line trimmers

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

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How to replace a line trimmer fuel line

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours...

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Repair time and Difficulty

 15 minutes or less
How to replace a line trimmer carburetor

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these ...

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Repair time and Difficulty

 15 minutes or less
How to rebuild a line trimmer carburetor

How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow...

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Repair time and Difficulty

 15 minutes or less

Effective articles & videos to help repair your line trimmers

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

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Line trimmer: Preventing fuel vapor lock in hot summer conditions

Line trimmer: Preventing fuel vapor lock in hot summer conditions

Vapor lock can stop your trimmer cold in summer heat. Learn how to prevent it and keep your lawn looking sharp...

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Straight shaft vs curved shaft trimmers: What’s the difference?

Straight shaft vs curved shaft trimmers: What’s the difference?

Trying to decide between a straight shaft and curved shaft trimmer? This guide compares both designs to help you underst...

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Can you cut grass with a weed whacker?

Can you cut grass with a weed whacker?

Wondering if your weed whacker can pick up the slack for your broken lawn mower? You're not alone. In this guide, we bre...

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