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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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Owner’s manual
Error Codes

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
$5.88 | 
63% OFF MSRP : $16.00
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
$15.52 | 
43% OFF MSRP : $27.00
In Stock
Lawn & Garden Equipment Engine Carburetor 993-00170
#73

Carburetor assembly diagram

Lawn & garden equipment engine carburetor

Part #993-00170

Replaced by #993-00170A

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Manufacturer substitution
This part replaces 993-00170. Substitute parts can look different from the original.
$89.60 | 
25% OFF MSRP : $120.00
In Stock
Lawn & Garden Equipment Engine Electric Starter 925-06300
#109

Starter assembly diagram

Lawn & garden equipment engine electric starter

Part #925-06300

$237.43 | 
21% OFF MSRP : $300.00
In Stock
Lawn & Garden Equipment Engine Flywheel Key 951-10307
#45

Crankshaft/crankcase cover diagram

Lawn & garden equipment engine flywheel key

Part #951-10307

Replaced by #751P10307A

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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
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
Lawn & Garden Equipment Engine Throttle Control Bracket 951-05249
#39

Crankcase diagram

Lawn & garden equipment engine throttle control bracket

Part #951-05249

$47.43 | 
10% OFF Phone Price : $52.43
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
Seal-oil 38 937-05067
#16

Crankcase diagram

Seal-oil 38

Part #937-05067

This item is not returnable
$24.91
In Stock
Lawn & Garden Equipment Engine Carburetor Gasket 951-14947
#72

Carburetor assembly diagram

Lawn & garden equipment engine carburetor gasket

Part #951-14947

This item is not returnable
$12.51 | 
14% OFF Phone Price : $14.51
In Stock

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