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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 | 
19% OFF Phone Price : $31.18
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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
In Stock
Filtter 78602
#12

Carburetor assembly diagram

Filtter

Part #78602

Replaced by #G078602

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Manufacturer substitution
This part replaces 78602. Substitute parts can look different from the original.
This item is not returnable
$2.87 | 
26% OFF Phone Price : $3.87
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Starter Pull 81671
#14

Carburetor assembly diagram

Starter pull

Part #81671

Replaced by #095268ASRV

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Manufacturer substitution
This part replaces 81671. Substitute parts can look different from the original.
$64.99 | 
8% OFF Phone Price : $70.99
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Carburetor Assembly 90876
#7

Carburetor assembly diagram

Carburetor assembly

Part #90876

Replaced by #0C1535ASRV

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Manufacturer substitution
This part replaces 90876. Substitute parts can look different from the original.
$137.55 | 
8% OFF Phone Price : $149.55
In Stock
Module Assembly 87221A
#61

Carburetor assembly diagram

Module assembly

Part #87221A

Replaced by #087221A

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Manufacturer substitution
This part replaces 87221A. Substitute parts can look different from the original.
$36.09
In Stock
Gasket 91846
#16

Carburetor assembly diagram

Gasket

Part #91846

Replaced by #G091846

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Manufacturer substitution
This part replaces 91846. Substitute parts can look different from the original.
This item is not returnable
$18.91
In Stock
Base 78607
#31

Carburetor assembly diagram

Base

Part #78607

Replaced by #G078607

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Manufacturer substitution
This part replaces 78607. Substitute parts can look different from the original.
This item is not returnable
$22.38
In Stock
Fuel Cap 90878
#5

Pump head & cradle assy diagram

Fuel cap

Part #90878

Replaced by #846987

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Manufacturer substitution
This part replaces 90878. Substitute parts can look different from the original.
$31.60
In Stock
Hose 90947
#18

Carburetor assembly diagram

Hose

Part #90947

Replaced by #090947A

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Manufacturer substitution
This part replaces 90947. Substitute parts can look different from the original.
This item is not returnable
$11.22 | 
15% OFF Phone Price : $13.22
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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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