Husqvarna Part Number 537338306 Trimmer Head

What It Is

The Husqvarna 537338306 is a genuine OEM replacement trimmer head for Husqvarna and compatible Jonsered/Poulan Pro gas trimmers. It’s a bump-feed, fixed-line head designed for medium-duty residential trimming.

Fitment & Compatibility

Before buying, confirm your trimmer uses a 10mm (0.394”) threaded shaft with left-hand threads—most Husqvarna 120/220/320 series models do, but check your manual. This head does not fit curved-shaft trimmers or models with a different shaft diameter (e.g., 8mm or 12mm). It replaces part numbers 537338306, 537338305, and 530071509. If you have a non-Husqvarna brand, verify shaft thread pitch (standard is 1.25mm) and note aftermarket heads may be cheaper but lack OEM fit guarantees.

Key Things to Know

• Quality: OEM build is solid, but some users report the bump-feed mechanism can jam with heavy debris or if line is loaded incorrectly.
• Installation: Moderate difficulty—you’ll need a tool (included) to hold the shaft while turning the head clockwise to tighten. Reverse threads mean “lefty-tighty, righty-loosey.”
• Line Loading: Holds 0.095” or 0.105” diameter line, about 20 feet total. Overfilling or using thicker line will cause feed issues.
• Gotcha: The head is not universal—it won’t fit straight-shaft trimmers with a different thread or larger line capacity. Check your trimmer’s model number against Husqvarna’s compatibility list.

Should You Buy It

If you own a Husqvarna or compatible trimmer and want a drop-in OEM replacement with reliable bump-feed, this is a solid choice. Skip it if you need heavy-duty commercial use, prefer a quick-load head, or have a non-standard shaft size—aftermarket options may offer better value or features.