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Briggs & Stratton Original Equipment 491588S Air Filter. Briggs & Stratton genuine parts are specially designed to exact OEM standards, manufactured and tested to help deliver optimum performance in Briggs & Stratton engines.

NGK spark plug. The spark plug ignites the fuel and air mixture in the cylinder to power the engine. If the spark plug is burnt, fouled or damaged the engine may not start or may run rough.

Briggs & Stratton Spark Plug (RJ19LM). If the engine does not start or runs poorly then the spark plug may be defective and will need replacement.

Small engine recoil starter assembly. This item includes the pulley and spring. The recoil starter engages the drive cup on the flywheel to start the engine when pulled.

Small engine NGK spark plug (BPR6ES). If the engine does not start, the spark plug may be defective. The spark plug should be replaced periodically during regular maintenance.

Lock nut with nylon insert.

Briggs & Stratton recoil starter kit. The recoil starter engages the drive cup on the flywheel to start the engine. If the recoil starter is defective, the engine may not start.

Nylon insert locking nut. Used as part of the shear bolt assembly, as well as other locations within the equipment.

Briggs & Stratton starter gear (also called a pinion gear), 16-tooth, plastic. The starter gear engages the flyhweel to start the engine. If the teeth on the starter gear are worn out, the engine may not start.

Extension spring, .380 x 2.500

Briggs & Stratton flywheel key. The flywheel key aligns the flywheel in the correct position on the crankshaft. If the engine stops suddenly due to hitting a hard object, the flywheel key shears in half to prevent damage to the engine. If the flywheel key is broken, the engine won't start.

Briggs & Stratton in-line fuel filter. If the fuel filter is clogged, it will restrict the flow of fuel to the carburetor. As a result, the engine may not start.

Screw, HH

Gasket-float bowl

Brake Pads
Wheel Horse tractors built a reputation for reliability, and yours can keep that streak going with the right replacement parts. Whether your machine won't start, cuts unevenly, or has lost its self-propel, we stock genuine OEM parts engineered to restore your tractor's performance. From carburetors to drive belts, our inventory covers the high-failure parts that matter.
Summer is the season you need your Wheel Horse working—not sitting idle in the garage. Order today and get back to mowing with confidence.
Find the exact Wheel Horse lawn mower parts you need by entering your model number above—we'll match you to compatible parts in seconds.
The most common culprits are a fouled spark plug, dirty carburetor, or stale fuel. If the engine turns over but won't fire, pull the spark plug and inspect the electrode gap. If it's gunked up or the gap is too wide, replacement is cheap and fast. Next, check your fuel line and carburetor for varnish buildup—especially if the mower sat unused all winter. A genuine Wheel Horse carburetor kit or complete carb swap often solves stubborn no-start issues.
Look for a metal plate or decal on the frame beneath the seat or on the rear axle housing. Wheel Horse model numbers typically start with a number (like 8, 10, 12) followed by letters or additional digits. Write down the complete number—don't guess. This single detail tells us which belts, pulleys, and engine parts will fit your specific tractor. Our parts finder will match you quickly once you enter it.
First, disengage the blades and check that both cutting edges are level and equally sharp. A bent or dull blade creates ragged grass and uneven deck discharge. Replace blades as a matched pair to maintain balance. If blades look good, the spindles underneath may be worn or the deck itself could be bent. Genuine Wheel Horse spindle assemblies and deck parts are engineered to your tractor's exact geometry.
Drain old fuel or add fuel stabilizer, change the engine oil, replace the spark plug, and clean or swap the air filter. Pull the spark plug wire before storage to prevent accidental starting. Come spring, fresh spark plugs and a new carburetor gasket kit (if your model has been sitting more than a season) make cold-start vastly easier. Stock these essentials now so you're ready the moment mowing season returns.


Ordering Wheel Horse lawn mower parts online is simple and helps you find genuine OEM parts for your unit. With same-day shipping on most in-stock items, you'll have your replacement part fast, minimizing downtime. Our model/part number lookup finds the exact OEM part for your unit, and every order is backed by our 365-day return policy and price-match guarantee. Browse our repair help section for troubleshooting tips, part testing guides, and step-by-step installation videos for your specific product.
On Wheel Horse lawn mowers, look for a metal plate or decal beneath the seat, on the rear axle housing, or along the frame below the steering column. Clean off dirt and record the complete model number, including letters, numbers, and separators. Type it into our model number lookup and the catalog narrows to parts made for your unit, across every part category. Using the full model number helps match belts, blades, engine parts, controls, and other associated parts to the whole mower. You order with confidence knowing the fit is right.

Repair Clinic's online repair resources give you a clear path to fix your Wheel Horse Lawn Mower without a service call. Symptom articles help identify the likely cause, part testing videos confirm the failed component, and step-by-step repair guides walk you through the installation with photos and video. Look up your model number to match the correct OEM part on the first try.

Repair Clinic has five ways for you to stop your lawn mower from leaking gas. Before we get to those, let's review how the gasoline you pour into the tank powers the mower.

Why does your lawn mower battery keep dying? Repair Clinic has done the research and this article will provide some answers, starting with what a battery's purpose is on a gas-powered lawn mower.

What's causing that black smoke to billow out of the engine? There are three likely reasons and they are all related to how a gas-powered lawn mower engine operates.