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Champion Spark Plug (RC12YC). 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.

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.

Kohler Original Equipment 52 050 02-S Pro Performance 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).

Riding lawn mower blade spindle assembly. Fits 5 star blade mounting holes. Mounting holes are not pre-threaded, new self tapping mounting screw are recommended. See related parts.

Oil filter

Kawasaki 10W-40 4-Cycle Engine Oil. Kawasaki KTECH 4-cycle oil is enhanced with Anti-Foaming and Anti-Sheer agents, along with other additives.

Carburetor for four-cycle engine. If the carburetor is clogged, the engine won't get enough fuel. As a result, the engine may not start or may run rough. The carburetor can often be cleaned or rebuilt, but may sometimes need to be replaced.

Rod, push

Fuel pump.

Self Tapping Screw

Gasket, fuel bowl

Gasket, exhaust

Seal, oil

Dipstick assembly

Stud bolt
Kohler engines power everything from generators and pressure washers to snowblowers and tillers. When a Kohler engine won't start, runs rough, or loses power, the culprit is often one of a handful of common parts. Carburetors clogged by ethanol-damaged fuel, weak spark plugs, kinked fuel lines, and failed ignition coils are the top Kohler repairs — and Repair Clinic stocks OEM Kohler parts for fast, reliable fixes.
Find the exact carburetor kit, spark plug, fuel pump, or air filter for your Kohler engine model by entering your equipment model number. Kohler small engines are used across multiple brands, so using your engine's model and spec number ensures you get the right replacement part every time.
The most common reasons are a dirty carburetor (ethanol gums up the float needle), a fouled spark plug, or a cracked/collapsed fuel line. Start with spark plug replacement and fuel line inspection. If the engine cranks but won't catch, the carburetor is next — a rebuild kit often solves the problem without a full carb replacement. For sitting equipment (generators, pressure washers), drain old fuel and run fresh gas through before replacing parts.
The model and spec number are stamped or decaled on the engine block itself, usually on the side or top. They look like "CH620-3011" or "SV590-0034." Write down the full model and spec — Kohler uses spec numbers to differentiate engines used in different equipment, so both numbers are required for getting the exact OEM part. You can also look up your equipment (pressure washer, generator, snowblower) model number; we cross-reference it to the Kohler engine inside.
A rebuild kit includes new gaskets, seals, float needle, and jet pack — it fixes most carburetor issues caused by ethanol or old fuel. A full carb replacement is pre-assembled and ready to bolt on. For engines that have sat for a season or two, a rebuild kit is often enough and saves money. For severely corroded or damaged carburetors, a full replacement carb is the safer choice.
Spark plugs should be inspected annually and replaced if fouled or worn (gap widens over time). Air filters depend on the environment — dusty conditions need more frequent changes. For seasonal equipment (snowblowers, generators), replace the spark plug and air filter before storage and again before starting the season. Use the OEM Kohler spark plug type specified for your engine — heat range matters for reliable ignition.


Ordering Kohler brand-level 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.
To match parts across your Kohler equipment, first locate the engine's model and spec numbers. Kohler usually puts them on a decal or stamped label on the engine block, cooling shroud, or engine cover. Record every character, including the spec suffix, because engines used in generators, pressure washers, snowblowers, and tillers can share similar model names. Type the complete model number into the search bar to narrow the catalog to parts that fit your specific Kohler engine and its equipment. This gives you a precise starting point for ordering the correct replacement parts without sorting through unrelated results.

Repair Clinic's online repair resources give you a clear path to fix your Kohler 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.

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