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Generac
Gas Pressure Washer

Model # 9898-1 Official Generac 7.8-hp 2500-psi pressure washer

Here are the diagrams and repair parts for Official Generac 9898-1 7.8-hp 2500-psi pressure washer, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 264 parts  |
Valve 78298
#6

Pump head & cradle assy diagram

Valve

Part #78298

Replaced by #192980GS

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Manufacturer substitution
This part replaces 78298. Substitute parts can look different from the original.
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$25.18 | 
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Bushing 78299
#7

Pump head & cradle assy diagram

Bushing

Part #78299

Replaced by #192980GS

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Manufacturer substitution
This part replaces 78299. Substitute parts can look different from the original.
BEST SELLER
$25.18 | 
19% OFF Phone Price : $31.18
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Filter 78601
#11

Carburetor assembly diagram

Filter

Part #78601

Replaced by #78601GS

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Manufacturer substitution
This part replaces 78601. Substitute parts can look different from the original.
$20.18 | 
23% OFF Phone Price : $26.18
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Gasket 93645
#33

Cylinder assembly diagram

Gasket

Part #93645

Replaced by #B2668GS

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Manufacturer substitution
This part replaces 93645. Substitute parts can look different from the original.
This item is not returnable
$11.89 | 
14% OFF Phone Price : $13.89
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Connector 75187
#10

Accessories and attachments diagram

Connector

Part #75187

Replaced by #6190

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Manufacturer substitution
This part replaces 75187. Substitute parts can look different from the original.
$24.09 | 
20% OFF Phone Price : $30.09
In Stock
Quick Connct 96016
#53

Pump head & cradle assy diagram

Quick connct

Part #96016

Replaced by #6190

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Manufacturer substitution
This part replaces 96016. Substitute parts can look different from the original.
$24.09 | 
20% OFF Phone Price : $30.09
In Stock
Qkdismalehos 95456
#52

Pump head & cradle assy diagram

Qkdismalehos

Part #95456

Replaced by #6190

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Manufacturer substitution
This part replaces 95456. Substitute parts can look different from the original.
$24.09 | 
20% OFF Phone Price : $30.09
In Stock
Coupler 75188
#11

Accessories and attachments diagram

Coupler

Part #75188

Replaced by #312981GS

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Manufacturer substitution
This part replaces 75188. Substitute parts can look different from the original.
$43.27 | 
12% OFF Phone Price : $49.27
In Stock
Connector 75197
#19

Accessories and attachments diagram

Connector

Part #75197

Replaced by #312981GS

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Manufacturer substitution
This part replaces 75197. Substitute parts can look different from the original.
$43.27 | 
12% OFF Phone Price : $49.27
In Stock
Gasket 78631
#8

Carburetor assembly diagram

Gasket

Part #78631

Replaced by #G078631

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Manufacturer substitution
This part replaces 78631. Substitute parts can look different from the original.
This item is not returnable
$6.86
In Stock

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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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 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 won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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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 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 doesn't my pressure washer recoil starter work?

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

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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 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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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 check valve kit

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valv…

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Repair difficulty
Time required
 120 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 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

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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