Kohler engines use spin-on filters that match specific engine models, and the filter part number depends on which Kohler engine you own
Kohler makes several lines of small engines — Command, Courage, Confidant, and others — and each uses its own filter. You cannot buy a generic "Kohler oil filter" the way you might buy a generic air filter. The filter you need is tied to your engine's displacement (measured in cc), horsepower, and production year. A Command 15 uses a different filter than a Command 20, even though both are Command engines.
The fastest way to find your filter is to look at your engine's model and serial number, usually stamped on the blower housing or the side of the crankcase. Write down the full model number — it will look something like "CH440" or "SV590" — and search Kohler's parts catalog or your equipment manual. The manual lists the correct filter part number in the maintenance section. If you have lost the manual, Kohler's website has downloadable PDFs for most models.
Once you have the part number, you can order it from Kohler dealers, online retailers like Amazon or eBay, or general equipment suppliers. Prices typically range from $8 to $18 depending on the model and where you buy. Spin-on filters are standard across the industry, so the part itself is straightforward — the challenge is matching it to your specific engine.
Key Takeaways
- Your Kohler engine's model number, printed on the crankcase or blower housing, determines which filter you need — there is no universal Kohler filter.
- The owner's manual or Kohler's online parts catalog lists the correct filter part number for your engine model.
- Kohler spin-on filters cost between $8 and $18 and are available from Kohler dealers, online retailers, and equipment suppliers.
- Replacing a Kohler oil filter takes 10 to 15 minutes and requires only an oil filter wrench and a drain pan to catch old oil.
- Kohler recommends changing the oil filter every time you change the oil, typically every 50 to 100 hours of engine run time depending on the model.
How to identify your Kohler engine model
The model number is your starting point. On most Kohler engines, it is stamped into the metal on the side of the crankcase or on the blower housing — the plastic or metal cover that surrounds the top of the engine. The number will be something like "CH440-3009" or "SV590-0001". Write down the entire string, including any letters and all digits after the dash.
If you cannot find the number on the engine itself, check your equipment's manual or the paperwork that came with your mower, generator, or pump. The manual will list the Kohler engine model in the specifications section. You can also check the equipment's serial number plate, which often references the engine model.
Once you have the model number, go to Kohler's website and use their parts lookup tool, or search for "[your model number] oil filter" in a search engine. Kohler's official parts pages will show you the correct filter part number and often a diagram showing where it sits on the engine.
Common Kohler engine models and their filters
Kohler's Command series, used in many commercial mowers and generators, includes models like the CH440, CH620, and CH730. Each has its own filter. The Courage series, found in residential lawn mowers, includes the SV470, SV590, and SV610. The Confidant line, less common, includes models like the PA-CH395. Knowing which series your engine belongs to narrows the search.
A CH440 Command engine, for example, uses Kohler part number 52 050 02-S. A SV590 Courage uses 52 050 02-S as well — but a SV470 uses a different part number. This is why the model number matters: two engines from the same manufacturer can look similar but need different filters. Do not assume two Kohler engines use the same filter just because they are both Kohler.
If you are shopping for a used piece of equipment and the manual is missing, take a photo of the engine's model number and email it to a Kohler dealer or post it in an equipment forum. Dealers can usually identify the correct filter in minutes.
Steps to replace a Kohler oil filter
Start with the engine cold and unplugged or with the spark plug wire disconnected. Locate the filter, which is a cylindrical canister mounted vertically or at an angle on the side of the engine. Place a drain pan underneath it to catch oil that will spill when you remove the old filter.
Use an oil filter wrench — a metal band or cup tool that grips the filter's outer edge — to turn the filter counterclockwise. Most filters come off by hand after you have loosened them with the wrench. Once the filter is free, tip it slowly into the drain pan to empty any remaining oil inside.
Wipe the filter mounting surface on the engine with a clean cloth to remove old oil and debris. Take your new filter and explore a thin coat of fresh oil to the rubber gasket (the ring at the top of the filter). Screw the new filter on by hand until the gasket touches the engine, then turn it an additional three-quarter turn. Do not use the wrench to tighten it — hand-tight is correct. Over-tightening can damage the gasket and cause leaks.
Add fresh oil to the crankcase to the level shown on the dipstick, start the engine, and let it run for a minute. Stop it, wait a few minutes, and check the oil level again. Top up if needed. The filter is now replaced.
Where to buy Kohler oil filters
Kohler dealers are the most reliable source and can confirm the part number before you buy. They stock filters for common models and can often order less common ones within a few days. Dealer prices are usually higher than online retailers but include the certainty that you have the right part.
Online retailers like Amazon, eBay, and Tractor Supply carry Kohler filters for popular engines. Read the product listing carefully to confirm the part number matches your engine model. Some listings are vague or list multiple compatible models, so verify before ordering.
Local equipment repair shops often stock filters for the engines they service and may sell them to customers who are doing their own maintenance. This is a good option if you have a shop nearby that works on your type of equipment.
Oil filter maintenance intervals for Kohler engines
Kohler recommends changing the oil filter every time you change the engine oil. For most small engines, this is every 50 to 100 hours of run time, depending on the model and the conditions. If you use your equipment in dusty or dirty environments, change the filter more often — every 25 to 50 hours.
If you are unsure of your engine's interval, check the owner's manual. The maintenance schedule is always in the back. If you have lost the manual, Kohler's website has PDFs for most models, searchable by model number.
Changing the filter at the recommended interval keeps the engine clean and extends its life. A clogged filter restricts oil flow, which can cause overheating and wear. It is one of the cheapest maintenance tasks you can do and one of the most important.
Frequently Asked Questions
Can I use an aftermarket filter instead of a Kohler filter?
Yes, if the aftermarket filter has the same part number or is listed as compatible with your specific engine model. Many manufacturers make filters that fit Kohler engines. Check the product listing or ask the seller to confirm compatibility with your model number before buying.
What if I cannot find the model number on my engine?
Check your equipment's manual or the serial number plate on the equipment itself. If neither is available, take a clear photo of the engine and email it to a Kohler dealer or post it in an online forum for your equipment type. Dealers can usually identify the model from a photo.
How much oil spills when I remove the filter?
Usually between a quarter and a half cup, depending on how much oil is in the filter at the time. Always place a drain pan underneath before you loosen the filter. Tip the filter slowly into the pan to minimize spilling.
Do I need to drain the oil before changing the filter?
No. You can change the filter alone without draining the crankcase oil. However, Kohler recommends changing both the oil and filter together at each service interval. If you are only changing the filter, top up the crankcase oil afterward to bring it back to the correct level.
What happens if I install the wrong filter?
The filter may not fit properly, may leak, or may restrict oil flow incorrectly. Always verify the part number matches your engine model before installation. If you have installed the wrong filter, remove it and install the correct one before running the engine.