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Model # 4X90HU Official MTD engine

Here are the diagrams and repair parts for Official MTD 4X90HU 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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Model diagram and schematic

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Showing 10 of 147 parts  |

Lawn & Garden Equipment Engine Spark Plug 951-10292
#153

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
$5.70
15% OFF Phone Price : $6.70
In Stock
Lawn & Garden Equipment Engine Oil Filter 951-12690
#64

Crankshaft/crankcase cover diagram

Lawn & garden equipment engine oil filter

Part #951-12690

Replaced by #490-201-Y010

?
Manufacturer substitution
This part replaces 951-12690. Substitute parts can look different from the original.
BEST SELLER
$16.97
11% OFF Phone Price : $18.97
In Stock
Mtd Lawn Tractor Air Filter 937-05066
#65

Air intake diagram

Mtd lawn tractor air filter

Part #937-05066

This item is not returnable
$30.06
17% OFF Phone Price : $36.06
In Stock
Lawn & Garden Equipment Engine Nut 712-05015
Lawn & garden equipment engine nut

Part #712-05015

This item is not returnable
$10.14
16% OFF Phone Price : $12.14
In Stock
Lawn & Garden Equipment Engine Throttle Linkage Spring 951-12231
#87

Crankcase diagram

Lawn & garden equipment engine throttle linkage spring

Part #951-12231

This item is not returnable
$6.47
13% OFF Phone Price : $7.47
In Stock
Lawn & Garden Equipment Engine Mounting Screw 710-04915
Lawn & garden equipment engine mounting screw

Part #710-04915

This item is not returnable
$6.75
13% OFF Phone Price : $7.75
In Stock
Mtd Lawn & Garden Equipment Engine Carburetor Gasket 951-14947
#72

Carburetor assembly diagram

Mtd lawn & garden equipment engine carburetor gasket

Part #951-14947

This item is not returnable
$12.51
14% OFF Phone Price : $14.51
In Stock
Mtd Lawn & Garden Equipment Engine Air Filter Base Gasket 921-04745
#74

Air intake diagram

Mtd lawn & garden equipment engine air filter base gasket

Part #921-04745

This item is not returnable
In Stock
Lawn & Garden Equipment Engine Ignition Coil 994-00128
Lawn & garden equipment engine ignition coil

Part #994-00128

$109.05
10% OFF Phone Price : $121.05
In Stock
Shrd:engine 951-12205
#7

Engine shroud diagram

Shrd:engine

Part #951-12205

In Stock

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