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Homelite
Gas Pressure Washer

Model # UT80977 Official Homelite power washer

Here are the diagrams and repair parts for Official Homelite UT80977 power washer, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

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Showing 10 of 176 parts  |
Plasticnoz 518790009
#5

Frame assy diagram

Plasticnoz

Part #518790009

The manufacturer no longer makes this part, and there's no substitute part

Impeller 099980425087
#90

Engine assy diagram

Impeller

Part #099980425087

The manufacturer no longer makes this part, and there's no substitute part

Pressure Washer Outlet Tube Kit 308862003
#61

Frame assy diagram

Pressure washer outlet tube kit

Part #308862003

The manufacturer no longer makes this part, and there's no substitute part

Pressure Washer Inlet Tube 308861003
#60

Frame assy diagram

Pressure washer inlet tube

Part #308861003

The manufacturer no longer makes this part, and there's no substitute part

Muffler Cover 099980425100
#79

Engine assy diagram

Muffler cover

Part #099980425100

The manufacturer no longer makes this part, and there's no substitute part

Oil Seal 099980425020
#20

Engine assy diagram

Oil seal

Part #099980425020

The manufacturer no longer makes this part, and there's no substitute part

Assembly 988000350
#NI

Frame assy diagram

Assembly

Part #988000350

The manufacturer no longer makes this part, and there's no substitute part

Oil Seal 099980425026
#26

Engine assy diagram

Oil seal

Part #099980425026

The manufacturer no longer makes this part, and there's no substitute part

Rocker Val 099980425051
#51

Engine assy diagram

Rocker val

Part #099980425051

The manufacturer no longer makes this part, and there's no substitute part

Bolt 099980425083
#86

Engine assy diagram

Bolt

Part #099980425083

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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Why won't my pressure washer engine start?

Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…

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Why does my pressure washer's engine lose power?

Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…

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Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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Why is smoke coming from the pressure washer's exhaust?

Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…

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Why does water spray out of my pressure washer's pressure relief valve?

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…

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Why is the spray from my pressure washer weak?

Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…

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Why won't my pressure washer mix in the detergent?

Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…

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Why doesn't my pressure washer recoil starter work?

Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…

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Repair guides for gas pressure washers

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

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How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

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Repair difficulty
Time required
 15 minutes or less
How to install a pressure washer O-ring kit

How to install a pressure washer O-ring kit

O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…

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Repair difficulty
Time required
 45 minutes or less
How to replace a pressure washer pump

How to replace a pressure washer pump

The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the ch…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your pressure washers

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

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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