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Model # 099 Official MTD gas lawn mower
Here are the diagrams and repair parts for Official MTD 099 gas lawn mower, as well as links to manuals and error code tables, if available.
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Browse Parts for
099 Walk-Behind Mowers
#32
Mower diagram
Bell support
Part #736-0524A
Replaced by #736-0524B-1
?
Manufacturer substitution
This part replaces 736-0524A. Substitute parts can look different from the original.
Get free shipping with Automatic Reorder
$6.78 |
13% OFF Phone Price : $7.78
Back Order
#6
Mower diagram
Knob wing nut
Part #720-0284
Replaced by #720-04072A
?
Manufacturer substitution
This part replaces 720-0284. Substitute parts can look different from the original.
$9.33 |
10% OFF Phone Price : $10.33
In Stock
#34
Mower diagram
Hinge pin
Part #747-0710
Replaced by #747-0710A
?
Manufacturer substitution
This part replaces 747-0710. Substitute parts can look different from the original.
This item is not returnable
$4.76 |
17% OFF Phone Price : $5.76
Back Order
#24
Mower diagram
Yard machines lawn mower wheel
Part #734-1987
$26.80 |
18% OFF Phone Price : $32.80
In Stock
#8
Mower diagram
Handle
Part #749-1093B
Replaced by #749-04037
?
Manufacturer substitution
This part replaces 749-1093B. Substitute parts can look different from the original.
$66.59 |
8% OFF Phone Price : $72.59
In Stock
#19
Mower diagram
Lawn mower height adjuster lever (replaces 687-02051)
Part #732-1026
This item is not returnable
$10.14 |
16% OFF Phone Price : $12.14
In Stock
#27
Mower diagram
Yard machines lawn & garden equipment cupped washer
Part #736-0270
This item is not returnable
$5.10 |
16% OFF Phone Price : $6.10
In Stock
#9
Mower diagram
Lawn & garden equipment cable tie
Part #725-0157
Replaced by #726-0178
?
Manufacturer substitution
This part replaces 725-0157. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
#41
Mower diagram
Yard-man lawn mower clipping deflector (replaces 731-1034, 731-1034b, 731-2230, 931-1034)
Part #931-1034B
$87.75 |
6% OFF Phone Price : $93.75
In Stock
#29
Mower diagram
Lawn mower wheel (replaces 734-04086)
Part #734-1988
This item is not returnable
$23.27 |
20% OFF Phone Price : $29.27
In Stock
Symptoms for gas walk-behind mowers
Choose a symptom to see related walk-behind mower repairs.
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…
Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…
Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…
Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…
Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…
Repair guides for gas walk-behind mowers
These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.
![How to rebuild a lawn mower carburetor](https://images.ctfassets.net/fpe0ec7r30ix/2fw6myzlKksH8PXPpR0bSP/02d2c746482d6359beb3710d95ed53a2/RG-LM-Rebuild-a-Walk-Behind-Lawn-Mower-Carburetor-Intro-Image.jpg?fm=png&w=270&h=270)
How to rebuild a lawn mower carburetor
The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…
Repair difficulty
Time required
60 minutes or less
![How to replace a lawn mower recoil starter on an OHV engine](https://images.ctfassets.net/fpe0ec7r30ix/5U5YHG3btYuY1YNx25W8Fa/d42840239e612933a8fffba6730fcf1d/RG-LM-Replace-a-Walk-Behind-Lawn-Mower-OHV-Engine-Recoil-Starter-Intro-Image.png?fm=png&w=270&h=270)
How to replace a lawn mower recoil starter on an OHV engine
Replace the recoil starter if it doesn't move when you pull the starter rope.…
Repair difficulty
Time required
15 minutes or less
![How to replace a lawn mower wheel](https://images.ctfassets.net/fpe0ec7r30ix/6eSWx6dbkR2zzcAnO16BJL/748a200b2d5629c36c27ea51390f08b9/RG-LM-Replace-a-Walk-Behind-Lawn-Mower-Wheel-Intro-Image.jpg?fm=png&w=270&h=270)
How to replace a lawn mower wheel
Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…
Repair difficulty
Time required
15 minutes or less
Effective articles & videos to help repair your walk-behind mowers
Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.
![How to enjoy all the online benefits we offer on our Sears PartsDirect website](https://images.ctfassets.net/fpe0ec7r30ix/1khJyw1eeQGvYKSbulrYWd/69493382c31bbf8d70b67fe7545f5e60/SPD_website_features.png?fm=png&w=270&h=270)
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
![Top questions about Sears and Sears PartsDirect](https://images.ctfassets.net/fpe0ec7r30ix/71r4g5Qhkmxm0giaIpcktG/e37c53ab5e6190ca17767b9872422fb8/Sears_PartsDirect_questions.png?fm=png&w=270&h=270)
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
![Types of walk-behind mower blades video](https://images.ctfassets.net/fpe0ec7r30ix/3cgsQVkIVSVgZqzWd8ZTQt/5a5b30c202154b41e06eeff937c05fdf/ART-walk-behind-mower-blade-types.jpeg?fm=png&w=270&h=270)
Learn about the different kinds of mower blades and how to maintain them.…