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MTD
Lawn & Garden Engine

Model # 478-SU Official MTD engine

Here are the diagrams and repair parts for Official MTD 478-SU 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”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 111 parts  |
Lawn & Garden Equipment Engine Spark Plug 951-10292
#45

Engine diagram

Lawn & garden equipment engine spark plug

Part #951-10292

Replaced by #951-10292A

?
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
Key 731-05632

#NI02

All parts diagram

Key

Part #731-05632

Replaced by #951-10630

?
Manufacturer substitution
This part replaces 731-05632. Substitute parts can look different from the original.
BEST SELLER
$8.44 | 
11% OFF Phone Price : $9.44
In Stock
Snowblower Carburetor Gasket (replaces 751-11223) 951-11223
#66

Engine diagram

Snowblower carburetor gasket (replaces 751-11223)

Part #951-11223

This item is not returnable
$8.09 | 
11% OFF Phone Price : $9.09
In Stock
Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket 951-11349
#132

Engine 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
In Stock
Snowblower Ignition Switch (replaces 751-10637, 925-04031a) 951-10637
#34

Engine diagram

Snowblower ignition switch (replaces 751-10637, 925-04031a)

Part #951-10637

This item is not returnable
$18.67 | 
10% OFF Phone Price : $20.67
In Stock
Snowblower Throttle Knob (replaces 751-11224, 951-10757) 951-11224
#114

Engine diagram

Snowblower throttle knob (replaces 751-11224, 951-10757)

Part #951-11224

This item is not returnable
$12.09 | 
14% OFF Phone Price : $14.09
In Stock
Snowblower Carburetor 951-11193
#67

Engine diagram

Snowblower carburetor

Part #951-11193

Replaced by #951-14024A

?
Manufacturer substitution
This part replaces 951-11193. Substitute parts can look different from the original.
$98.29 | 
11% OFF Phone Price : $110.29
In Stock
Lawn & Garden Equipment Engine Flywheel Key 951-10307
#123

Engine 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
Craftsman Lawn & Garden Equipment Engine Flange Bolt 710-04974
#37

Engine diagram

Craftsman lawn & garden equipment engine flange bolt

Part #710-04974

This item is not returnable
$12.00
In Stock
Gasket 751-11348
#137

Engine diagram

Gasket

Part #751-11348

Replaced by #951-11348A

?
Manufacturer substitution
This part replaces 751-11348. Substitute parts can look different from the original.
$10.03
In Stock

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