MTD
Lawn & Garden Engine

Model # 4P90JUB Official MTD engine

Here are the diagrams and repair parts for Official MTD 4P90JUB engine, 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 173 parts  |

Lawn & Garden Equipment Engine Spark Plug 951-10292
#162

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.
BEST SELLER
This item is not returnable
$5.88
15% OFF Phone Price : $6.88
In Stock
Lawn & Garden Equipment Engine Air Filter 951-12260
#126

Air intake diagram

Lawn & garden equipment engine air filter

Part #951-12260

Replaced by #937-05065A

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Manufacturer substitution
This part replaces 951-12260. Substitute parts can look different from the original.
BEST SELLER
$22.20
21% OFF Phone Price : $28.20
In Stock
Lawn & Garden Equipment Engine Carburetor (replaces 951-12771, 951-12823) 951-12771A
#131

Carburetor diagram

Lawn & garden equipment engine carburetor (replaces 951-12771, 951-12823)

Part #951-12771A

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$107.41
10% OFF Phone Price : $119.41
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Lawn & Garden Equipment Engine Ignition Coil 951-12220
#39

Ignition & electrical diagram

Lawn & garden equipment engine ignition coil

Part #951-12220

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$82.46
7% OFF Phone Price : $88.46
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Lawn & Garden Equipment Engine Pre-filter 951-12256
#124

Air intake diagram

Lawn & garden equipment engine pre-filter

Part #951-12256

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$7.99
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Lawn & Garden Equipment Engine Voltage Regulator 951-12242
#85

Crankshaft/crankcase cover diagram

Lawn & garden equipment engine voltage regulator

Part #951-12242

$63.45
9% OFF Phone Price : $69.45
In Stock
Lawn & Garden Equipment Engine Carburetor Insulator Gasket 951-12263
#138

Carburetor diagram

Lawn & garden equipment engine carburetor insulator gasket

Part #951-12263

This item is not returnable
$6.35
14% OFF Phone Price : $7.35
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Lawn & Garden Equipment Engine Fuel Shut-off Solenoid 951-14175
#AA

Carburetor diagram

Lawn & garden equipment engine fuel shut-off solenoid

Part #951-14175

$66.46
8% OFF Phone Price : $72.46
In Stock
Lawn & Garden Equipment Engine Stator 951-12224
#44

Ignition & electrical diagram

Lawn & garden equipment engine stator

Part #951-12224

$89.52
6% OFF Phone Price : $95.52
In Stock
Lawn & Garden Equipment Engine Carburetor Rebuild Kit 951-14179
#200

Carburetor diagram

Lawn & garden equipment engine carburetor rebuild kit

Part #951-14179

$60.02
9% OFF Phone Price : $66.02
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Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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

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

Main causes: broken recoil spring, damaged recoil starter…

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

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

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

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

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 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…

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…

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…

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

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

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What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…