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Model # 4P90HUC Official MTD engine

Here are the diagrams and repair parts for Official MTD 4P90HUC engine, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Owner’s manual
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Model diagram and schematic

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Showing 10 of 127 parts  |
Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket 951-11349
#DD

Carburetor assembly diagram

Lawn & garden equipment engine carburetor float bowl gasket

Part #951-11349

Replaced by #951-11349A

?
Manufacturer substitution
This part replaces 951-11349. Substitute parts can look different from the original.
This item is not returnable
$5.64 | 
15% OFF Phone Price : $6.64
Back Order
Lawn & Garden Equipment Engine Intake Manifold Gasket 951-12258A
#26

Air intake 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 & Garden Equipment Engine Flywheel Key 951-10307
#92

Crankshaft/crankcase cover diagram

Lawn & garden equipment engine flywheel key

Part #951-10307

Replaced by #751P10307A

?
Manufacturer substitution
This part replaces 951-10307. Substitute parts can look different from the original.
This item is not returnable
$3.22 | 
24% OFF Phone Price : $4.22
In Stock
Guide 951-12268
#5

Cylinder head diagram

Guide

Part #951-12268

This item is not returnable
$12.69
In Stock
Lawn Tractor Engine Sump Filter 951-12249
#116

Crankshaft/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 Valve Cover Gasket 951-12267
#3

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
Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket 951-11970
#Y

Carburetor assembly diagram

Lawn & garden equipment engine carburetor float bowl gasket

Part #951-11970

This item is not returnable
$10.46 | 
16% OFF Phone Price : $12.46
In Stock
Lawn Tractor Engine Oil Drain Plug (replaces 710-05311) 951-11644
#99

Crankshaft/crankcase cover diagram

Lawn tractor engine oil drain plug (replaces 710-05311)

Part #951-11644

This item is not returnable
$15.69 | 
11% OFF Phone Price : $17.69
In Stock
Linkage 951-12230
#84

Crankcase diagram

Linkage

Part #951-12230

This item is not returnable
$7.06
In Stock
Lawn & Garden Equipment Engine Exhaust Gasket 951-12271
#17

Cylinder head diagram

Lawn & garden equipment engine exhaust gasket

Part #951-12271

This item is not returnable
$10.83
In Stock

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