Air Filter 593260 798452 Compatible with 500EX 550EX 725EXI - 4 Pack

In this review the focus is on a practical replacement part: a 4-pack of air filters branded HQBC and listed as suitable for a wide range of small engines and lawn mower models. The bottom line: this kit is for anyone who needs an affordable, paper-element replacement for routine maintenance on compatible 500 and 600 series engines, and the single biggest reason to buy is the convenience of four ready-to-install filters that match common OEM types. For homeowners and landscapers who service their own equipment, these filters simplify upkeep without requiring precise cross-referencing of obscure part codes.

Key Features

• Four-pack convenience: Supplying four filters at once reduces downtime and means multiple seasonal changes can be handled without reordering.
• Broad engine compatibility: Designed to fit many 500, 550, 625, 675 and 725 series engines, which makes it suitable for mixed fleets of mowers and small engines.
• Paper filter element: Uses a replaceable filter paper media that traps dust and debris typical in lawn and garden use, protecting carburetors and engine intake.
• OEM-type fit: Form and dimensions are intended to match common 334404-style air filters, helping ensure a good seal and straightforward installation.
• Economical replacement: Sold as a pack of four, the set offers a cost-effective option for regular maintenance intervals.

Who It's For

This filter pack is best for homeowners, small-scale landscapers, and anyone who performs routine maintenance on lawn mowers and engines from the 500, 550, 625, 675 and 725EX/EXI families. It suits users who prefer to keep a few spare filters on hand for seasonal changes and who value a simple paper element that is easy to replace.

Those who should look elsewhere include owners of engines outside the listed compatibility group or users who need reusable foam or high-performance pleated filters; this product is a paper disposable element intended for standard maintenance rather than performance upgrades.

Pros & Cons

Pros

• Four filters in one package provide immediate spares for multiple services or machines.
• Covers a wide range of common 500/550/625/675/725 series engines, reducing the need to match many different part numbers.
• Paper element delivers reliable particulate removal for normal lawn care conditions.

Cons

• Paper disposable design is not reusable and will require periodic replacement based on operating conditions.

Specifications

Brand	HQBC
Package	4 Pack
Compatible engines	500, 500E, 500EX, 550E, 550EX, 625EX, 675EXI, 725EXI, 575EX series
Applicable engine codes	103M02, 104M02, 798339 and others listed as 09P702/09P000 types
Filter media	Filter paper
Filter type	334404-style air filter replacement

Our Verdict

For routine lawn mower maintenance the HQBC 4-pack is a pragmatic choice: it matches many common small engine models, uses standard paper media that works well for typical yard debris, and the multi-pack format is economical. Buy this if you need straightforward replacements and want spare parts on hand; seek a specialty or reusable filter if you need higher filtration efficiency or a washable element.

Frequently Asked Questions

Will these filters fit my 725EXI engine?
Yes, the listing specifies compatibility with 725EXI series engines and related 798339 engine codes, but confirm physical fit against your old filter before final installation.

Are these reusable or washable?
No, these use a paper filter element intended to be replaced periodically rather than washed and reused.

How many filter changes will the 4-pack cover?
That depends on service intervals and operating conditions, but four filters typically cover multiple seasons for a single mower or one change for several machines.