MTD
Lawn & Garden Engine

Model # 4P90JUA Official MTD engine

Here are the diagrams and repair parts for Official MTD 4P90JUA engine, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 178 parts  |

Lawn & Garden Equipment Engine Air Filter 951-12260
#126

Air filter diagram

Lawn & garden equipment engine air filter

Part #951-12260

Replaced by #937-05065A

?
Manufacturer substitution
This part replaces 951-12260. Substitute parts can look different from the original.
BEST SELLER
$22.20
23% OFF MSRP : $29.00
In Stock
Lawn & Garden Equipment Engine Starter Motor 951-12207
#9

Starter diagram

Lawn & garden equipment engine starter motor

Part #951-12207

BEST SELLER
$214.67
$10.00 OFF Phone Price : $224.67
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
In Stock
Lawn & Garden Equipment Engine Stator 951-12224
#44

Flywheel/coil diagram

Lawn & garden equipment engine stator

Part #951-12224

$77.31
30% OFF MSRP : $110.00
In Stock
Lawn Tractor Engine Manifold Gasket 951-12258
#130

Air filter diagram

Lawn tractor engine manifold gasket

Part #951-12258

Replaced by #951-12258A

?
Manufacturer substitution
This part replaces 951-12258. Substitute parts can look different from the original.
This item is not returnable
$6.35
14% OFF Phone Price : $7.35
In Stock
Lawn & Garden Equipment Engine Voltage Regulator 951-12242
#85

Crankshaft/crankcase diagram

Lawn & garden equipment engine voltage regulator

Part #951-12242

$63.45
7% OFF Phone Price : $68.45
In Stock
Guide 951-12268
#150

Cylinder head diagram

Guide

Part #951-12268

This item is not returnable
In Stock
Lawn & Garden Equipment Engine Exhaust Gasket 951-12271
#160

Muffler diagram

Lawn & garden equipment engine exhaust gasket

Part #951-12271

This item is not returnable
In Stock
Lawn & Garden Equipment Engine Starter Motor Front Cover 951-12208
#13

Starter diagram

Lawn & garden equipment engine starter motor front cover

Part #951-12208

This item is not returnable
$30.06
14% OFF Phone Price : $35.06
In Stock
Lawn & Garden Equipment Engine Valve Cover Gasket 951-12267
#144

Cylinder head diagram

Lawn & garden equipment engine valve cover gasket

Part #951-12267

This item is not returnable
$14.25
12% OFF Phone Price : $16.25
In Stock

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

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.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

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