Air Filter & Pre Filter Replaces Kohler 2508301-s 2508304-s Kawasaki 11013-7020 11013-7019 Fit Hustler Exmark Scag

What It Is

This air filter and pre-filter set replaces OEM part numbers Kohler 2508301-s, 2508304-s, Kawasaki 11013-7020, and 11013-7019. It’s designed for commercial zero-turn mowers from Hustler, Exmark, and Scag that use Kohler or Kawasaki engines.

Fitment & Compatibility

• Check your engine brand and model – This filter fits Kohler Courage, Command, and Courage XT series engines (e.g., SV470-SV620) and Kawasaki FX, FS, and FH series (e.g., FX600V, FS481V). It does not fit Briggs & Stratton or Honda engines.
• Measure your existing filter – The outer filter is roughly 5.5” tall x 3.5” wide; the pre-filter is a foam sleeve. If your current filter is larger or smaller, this won’t seal properly.
• OEM vs aftermarket – This is a non-OEM replacement, but it matches the dimensions and material of the originals. If you need exact OEM specs (e.g., for warranty), stick with Kohler or Kawasaki branded parts.
• Deck size irrelevant – Fitment depends on engine, not mower deck size. Verify engine model on the valve cover or engine shroud.

Key Things to Know

• Quality is solid for the price – Many users report it lasts a full season with regular cleaning. The foam pre-filter traps larger debris, extending the paper filter’s life.
• Installation is easy – No tools needed. Remove the old cover, swap the filter and pre-filter, and re-secure the cover. Ensure the foam sleeve is fully seated over the paper filter.
• Common gotcha – The pre-filter foam can degrade if exposed to gasoline or oil. Wipe it with a dry cloth only; do not soak in solvent.
• Check for debris in the housing – Before installing, clean out any dirt or grass clippings from the air filter housing to prevent contamination.

Should You Buy It

If you have a Kohler or Kawasaki engine on a Hustler, Exmark, or Scag zero-turn and want a reliable, budget-friendly replacement that matches OEM fitment, this is a solid choice. It’s ideal for routine maintenance and works well for homeowners or light commercial use. For heavy-duty commercial operation or warranty concerns, stick with the OEM part.