Lawn & Garden Engine

Model # 4P90JUD Official MTD engine

Here are the diagrams and repair parts for Official MTD 4P90JUD engine, as well as links to manuals and error code tables, if available.

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4P90JUD Engine
Lawn & Garden Equipment Engine Spark Plug 951-10292
#161

Cylinder head diagram

Lawn & garden equipment engine spark plug

Part #951-10292

Replaced by #951-10292A

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Manufacturer substitution
This part replaces 951-10292. Substitute parts can look different from the original.
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$5.81
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Lawn & Garden Equipment Engine Oil Filter 951-12690
#114

Carnkshaft/crankcase cover diagram

Lawn & garden equipment engine oil filter

Part #951-12690

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$22.60
21% OFF Phone Price : $28.60
In Stock
Lawn & Garden Equipment Engine Carburetor Gasket 951-12261
#135

Carburetor diagram

Lawn & garden equipment engine carburetor gasket

Part #951-12261

This item is not returnable
$6.35
14% OFF Phone Price : $7.35
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Lawn & Garden Equipment Engine Intake Manifold Gasket 951-12258A
#129

Carburetor diagram

Lawn & garden equipment engine intake manifold gasket

Part #951-12258A

This item is not returnable
$6.35
14% OFF Phone Price : $7.35
In Stock
Lawn Tractor Engine Sump Filter 951-12249
#100

Carnkshaft/crankcase cover diagram

Lawn tractor engine sump filter

Part #951-12249

This item is not returnable
$6.35
14% OFF Phone Price : $7.35
In Stock
Lawn & Garden Equipment Engine Oil Seal 951-11375
#118

Carnkshaft/crankcase cover diagram

Lawn & garden equipment engine oil seal

Part #951-11375

Replaced by #951-11375A

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Manufacturer substitution
This part replaces 951-11375. Substitute parts can look different from the original.
In Stock
Lawn & Garden Equipment Engine Exhaust Gasket 951-12271
#159

Muffler diagram

Lawn & garden equipment engine exhaust gasket

Part #951-12271

This item is not returnable
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Lawn & Garden Equipment Engine Valve Retainer 951-12080
#151

Cylinder head diagram

Lawn & garden equipment engine valve retainer

Part #951-12080

This item is not returnable
$6.47
13% OFF Phone Price : $7.47
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Lawn & Garden Equipment Engine Rocker Arm 951-11966
#147

Cylinder head diagram

Lawn & garden equipment engine rocker arm

Part #951-11966

This item is not returnable
$12.82
13% OFF Phone Price : $14.82
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Linkage 951-12230
#59

Crankcase diagram

Linkage

Part #951-12230

This item is not returnable
In Stock

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

Main causes: faulty unloader valve, bad pressure regulator…

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

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

Main causes: broken recoil spring, damaged recoil starter…

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

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

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

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

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

Repair guides for gas pressure washers

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

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…

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…

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…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your lawn & garden engines

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

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Top questions about Sears and Sears PartsDirect

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What are the main components of a lawn mower?

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