MTD
Lawn & Garden Engine

Model #478-SU MTD engine

Here are the diagrams and repair parts for 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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For DIY troubleshooting advice and repair guides, visit our repair help section.

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Showing 10 of 111 parts

Lawn & Garden Equipment Engine Spark Plug

#45

Engine Diagram

$8.27

In Stock

Lawn & Garden Equipment Engine Fuel Filter

#NI01

All parts Diagram

$10.33 | 
14% OFF MSRP:$12.00

In Stock

Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket

#132

Engine Diagram

Lawn & garden equipment engine carburetor float bowl gasket

Part #951-11349
This item is not returnable
$4.00

In Stock

Snowblower Fuel Filter

#101

Engine Diagram

Snowblower fuel filter

Part #951-10652
This item is not returnable
$5.79 | 
15% OFF MSRP:$6.80

In Stock

Snowblower Carburetor Gasket

#66

Engine Diagram

Snowblower carburetor gasket

Part #951-11223
This item is not returnable
$3.64 | 
7% OFF MSRP:$3.90

In Stock

Snowblower Throttle Knob

#114

Engine Diagram

Snowblower throttle knob

Part #951-11224
This item is not returnable
$4.85 | 
16% OFF MSRP:$5.80

In Stock

Snowblower Engine Oil Drain Pipe and Cap

#NI12

All parts Diagram

$8.00 | 
17% OFF MSRP:$9.60

In Stock

Snowblower Recoil Starter Assembly

#31

Engine Diagram

$66.39 | 
13% OFF MSRP:$76.00

In Stock

Lawn & Garden Equipment Engine Oil Drain Plug Washer

#32

Engine Diagram

Lawn & garden equipment engine oil drain plug washer

Part #736-04440
This item is not returnable
$4.19 | 
16% OFF MSRP:$5.00

In Stock

Lawn & Garden Equipment Engine Recoil Starter Handle

#133

Engine Diagram

$8.24 | 
12% OFF MSRP:$9.40

In Stock