AFZE30 GX390 Air Filter w/Spark Plug for Honda GX340 11HP 13HP Engine Replace 17210-ZE3-505 17210-ZE3-010 Lawn Mower Parts Air Cleaner

What It Is

This combo kit includes an air filter and spark plug designed for Honda GX340 and GX390 engines (11HP and 13HP) commonly used on walk-behind mowers, pressure washers, and small generators. It replaces OEM air filter part numbers 17210-ZE3-505 and 17210-ZE3-010.

Fitment & Compatibility

Before buying, confirm your engine model is GX340 or GX390 (check the stamped code near the recoil starter). This kit fits Honda engines only—not clones or generic GX-style engines unless verified. Measure your existing air filter height (approx. 3.5 inches) and mounting stud spacing (2.75 inches center-to-center). The spark plug is a standard BPR6ES or equivalent—check your engine’s plug gap specification (usually 0.028-0.031 inches). Not compatible with overhead valve (OHV) or side-valve engines.

Key Things to Know

• Quality: This is a genuine Honda part, not aftermarket. Expect better fit and longer service life than generic alternatives.
• Installation: Easy—remove two wing nuts, swap the filter, replace the spark plug with a 5/8-inch socket. No special tools needed.
• Common gotcha: The foam pre-filter (if included) must be oiled lightly before use; dry foam won’t trap fine dust. Also, ensure the spark plug is torqued to 18-22 ft-lbs—overtightening can crack the ceramic.
• Service interval: Replace the air filter every 100 hours or annually, and the spark plug every 200 hours or if hard starting occurs.

Should You Buy It

If you own a genuine Honda GX340 or GX390 engine and want a guaranteed fit with OEM reliability, this is a solid, low-cost maintenance kit. It’s ideal for DIY mower owners who prefer hassle-free replacement over chasing compatibility with aftermarket parts. Skip it if you have a clone engine or need just one component (buy separately to save on shipping).