MTD
Lawn & Garden Engine

Model # 478-SUC Official MTD engine

Here are the diagrams and repair parts for Official MTD 478-SUC 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 141 parts  |

Lawn & Garden Equipment Engine Spark Plug 951-10292
#148

Cylinder head 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
$5.88
15% OFF Phone Price : $6.88
Back Order
Lawn & Garden Equipment Engine Starter Key (replaces 731-05632, 751-10630) 951-10630
#6

Muffler & controls diagram

Lawn & garden equipment engine starter key (replaces 731-05632, 751-10630)

Part #951-10630

BEST SELLER
$8.44
11% OFF Phone Price : $9.44
In Stock
Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket 951-11349
#Y

Carburetor 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 Carburetor Gasket (replaces 751-11223) 951-11223
#171

Carburetor 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
Snowblower Ignition Switch (replaces 751-10637, 925-04031a) 951-10637
#5

Muffler & controls 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
Lawn & Garden Equipment Engine Carburetor Primer Bulb 951-11824
#174

Carburetor diagram

Lawn & garden equipment engine carburetor primer bulb

Part #951-11824

This item is not returnable
$17.13
10% OFF Phone Price : $19.13
In Stock
Craftsman Snowblower Recoil Starter Assembly (replaces 751-11208) 951-11208
#128

Starter/blower housing diagram

Craftsman snowblower recoil starter assembly (replaces 751-11208)

Part #951-11208

$88.72
6% OFF Phone Price : $94.72
In Stock
Lawn & Garden Equipment Engine Flywheel Key 951-10307
#90

Crankcase 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
Lawn & Garden Equipment Engine Valve Retainer 951-12080
#155

Cylinder head diagram

Lawn & garden equipment engine valve retainer

Part #951-12080

This item is not returnable
$6.47
13% OFF Phone Price : $7.47
In Stock
Lawn & Garden Equipment Engine Rocker Arm 951-11966
#159

Cylinder head diagram

Lawn & garden equipment engine rocker arm

Part #951-11966

This item is not returnable
$12.82
13% OFF Phone Price : $14.82
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.…