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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

Lawn mower deck belt. Width: 1/2 " Length: 95 1/2 ". If the blades do not rotate properly, this belt may be worn.

Briggs & Stratton exhaust push rod, steel.

Lawn mower ring cip.

Replacement Briggs & Stratton fuel line kit with clamps. 1/4 Inch inside diameter, Cut to length.

Briggs & Stratton in-line fuel filter. The filter screen is on the large side of the housing. The port on the large side goes to the fuel tank while the port on the small side of the housing goes to the carburetor.

Lawn mower front wheel flange bearing. (2) required for each wheel. It is recomended to replace both at the same time.

Carburetor gasket

Briggs & Stratton Original Equipment 696854 Extended Life Oil Filter. For optimum performance, we recommend changing the oil in your small engine after the first five hours of use. After that, change the oil on a yearly basis or after every 50 hours of use (whichever comes first).

Push rod for intake valve.

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.

Gasket set-valve

Tecumseh carburetor outlet gasket.

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.
Repair Clinic stocks genuine OEM Simplicity Lawn Mower parts that restore proper function and reliable performance. Every part is genuine OEM, ensuring correct fit and performance on your specific model. Enter your model number to find the exact Simplicity Lawn Mower part you need, with same-day shipping on most in-stock items and a 365-day return policy.
Check the frame or chassis near the engine—most Simplicity models display a stamped or adhesive label with the model and serial number. You can also check under the seat or on the deck housing. Having this number ready speeds up parts identification and ensures you order the correct parts.
Blade spindle bearing wear, bent or dull blades, and clogged deck undercarriage are common culprits. A worn spindle assembly won't grip the blade properly, causing uneven or incomplete cutting. If you hear grinding or rattling from the deck, spindle replacement is likely needed.
Stale fuel gumming the carburetor is the most frequent cause. Winter storage leaves fuel residue that hardens inside the carb passages and jets. A carburetor rebuild kit or complete carb replacement, combined with fresh fuel and a new spark plug, usually restores reliable starting.
No—Simplicity uses different carburetors depending on engine type and displacement. Always verify your specific model number before ordering carb jets, gaskets, or float needles. Mixing parts from different models can lead to poor performance or no-start conditions.


Ordering Simplicity 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.
Simplicity prints the model number on a label or stamped plate on the frame or chassis near the engine. Depending on the mower, you may also find it under the seat, on the mower deck housing, or on the engine cover. The model number identifies the entire mower, so use it rather than a part number when you need to narrow the catalog. Enter the number in our model number lookup, and the available parts will be filtered to those matched to your Simplicity mower. Check each character carefully, including letters, numbers, and any hyphens, before searching. This approach cuts through similar-looking options and helps you order with confidence knowing the fit is right.

Getting your Simplicity Lawn Mower back in working order is easier with the right online resources. Troubleshooting videos, repair help articles, part testing guides, and wiring diagrams give a clear path from symptom to solution. Once you know the failed part, look it up by model number and follow the installation video to complete the repair.

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.