595853 Air Filter With Pre Filter 597266 Replace BS 595853 597265 Fits BS 115P02 115P05 123P02 123P07 123P0B 123P32 125P02 125902

What It Is

This is a replacement air filter with pre-filter for Briggs & Stratton (BS) engines, designed to trap dirt and debris before they enter the carburetor. It fits BS 115P02, 115P05, 123P02, 123P07, 123P0B, 123P32, 125P02, and 125902 engines, commonly found on walk-behind mowers, pressure washers, and small utility tractors.

Fitment & Compatibility

• Check your engine model: Look for the model number (e.g., 115P02) stamped on the engine shroud or valve cover. This filter replaces BS OEM parts 595853 and 597266.
• Pre-filter included: The set includes both the main foam filter and a smaller pre-filter (597265). Some engines use only the main filter; verify your housing has two slots.
• Deck size irrelevant: Fitment depends solely on engine model, not mower deck width or brand.
• Measurements: Outer filter is roughly 4.5" x 3.5" x 1.5". If your old filter is significantly different, double-check.
• Aftermarket vs OEM: This is an aftermarket part. It matches OEM dimensions and material, but may have slightly different foam density. Works fine for most users.

Key Things to Know

• Installation is easy: No tools needed—just remove the air filter cover, swap filters, and reattach. Takes under 2 minutes.
• Pre-filter orientation: The pre-filter fits over the main filter’s inner hole. If it doesn’t seat flush, you may have the wrong side facing up.
• Oil the foam: For best performance, lightly coat the foam pre-filter with air filter oil (or even motor oil) and squeeze out excess. A dry filter lets fine dust through.
• Check for cracks: Old filter housings can warp or crack. If the cover doesn’t snap on tightly, replace the housing too—otherwise dirt bypasses the filter.

Should You Buy It

If you own a compatible Briggs engine and need a quick, cheap replacement, this is a solid choice. The high rating and low price make it a no-brainer for basic maintenance—just oil the pre-filter and verify fitment before buying. Not ideal if you require OEM certification for warranty or heavy commercial use, but for home mowers and occasional use, it works perfectly.