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MTD
Lawn & Garden Engine

Model # 690-WU Official MTD engine

Here are the diagrams and repair parts for Official MTD 690-WU engine, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 142 parts  |
Lawn & Garden Equipment Engine Spark Plug 951-10292
#14

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
$5.88
| 
15% OFF Phone Price : $6.88
Back Order
Lawn & Garden Equipment Engine Starter Key (replaces 731-05632, 751-10630) 951-10630
#126

Engine 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 Primer Bulb (replaces 951-10639) 951-10639A
#41

Engine diagram

Lawn & garden equipment engine carburetor primer bulb (replaces 951-10639)

Part #951-10639A

$26.71
| 
18% OFF Phone Price : $32.71
In Stock
Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket 951-11349
#Y

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
#40A

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
Lawn & Garden Equipment Engine Flywheel Key 951-10307
#63

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
Lawn & Garden Equipment Engine Valve Retainer 951-12080
#8

Engine 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
Piston Pin 951-11954
#53

Engine diagram

Piston pin

Part #951-11954

This item is not returnable
$16.29
In Stock
Int Valve 951-14225
#47

Engine diagram

Int valve

Part #951-14225

$27.80
In Stock
Lawn & Garden Equipment Engine Oil Seal 951-11499
#110

Engine diagram

Lawn & garden equipment engine oil seal

Part #951-11499

Replaced by #951-11499A

?
Manufacturer substitution
This part replaces 951-11499. Substitute parts can look different from the original.
$23.97
In Stock

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up...

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade...

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key...

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel...

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba...

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent...

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Repair difficulty
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15 minutes or less
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Repair difficulty
Time required
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