Yes, these walk-behind trimmer heads are replacement parts designed to restore or improve performance on walk-behind string trimmers. This guide highlights five practical options, explaining who each is best for and why it can help your lawn care routine. Whether you want a quick replacement, a universal head, or a durable mow ball system, these picks aim to fit common brands and models used in residential and light-duty commercial mowing.
| Product | Best For | Why It Stands Out |
|---|---|---|
| DECKMAN Carrier Plate & Mow Ball Kit | Owners with Husqvarna or Craftsman walk-behind mowers | Comprehensive kit with carrier plate and bolt assembly; broad compatibility across several models. |
| WEED WARRIOR EZ Lock Universal Replacement Head | Users seeking fast, tool-free line replacement | EZ Lock design reduces downtime; universal fit covers many brands and line sizes. |
| WHMYZHL 311011 Trimmer Mow Ball Head | Budget-conscious buyers needing a direct 311011 replacement | Plastic mow ball head with hex center bearing for smooth operation. |
| LIZEWEI 30 Pcs Universal Walk Behind Line | Cost-conscious buyers needing extra line spares | Includes 30 feet of universal line compatible with many models. |
| YAQINGMY 311011 Trimmer Mow Ball Head | Walk-behind trimmers requiring 311011 compatible head | Hex-centered mow ball option sized for common walk-behind units. |
DECKMAN Carrier Plate & Mow Ball Kit

Part numbers include 182217 and 532182217 with a complete Mow Ball Assembly, Bolt, and Carrier Plate. The kit lists compatibility with Husqvarna HU625WT and related models and with Craftsman lawn mowers. Best for homeowners who need a full rebuild kit that aligns with multiple older and newer frames. This kit is a solid choice when a dedicated replacement part set is required to restore mowing performance after wear. Caution: verify exact model compatibility before ordering, as some listings reference broader model families.
Who it’s best for: Homeowners seeking an all-in-one repair solution for popular 21″ walk-behind mowers from Husqvarna and Craftsman. Why selected: its inclusion of all necessary components reduces the need to source separate pieces. Limitation: model-specific fit may vary, so confirm your model number first.
WEED WARRIOR EZ Lock Universal Replacement Head

EZ Lock head is designed for quick line changes and simplified operation. It fits a wide range of trimmers, including Echo, Stihl, Husqvarna, and Weed Eater brands, and supports various line diameters. Best for: users who want minimal downtime during maintenance and quick swaps between trimming tasks. Why selected: ease of installation and strong universal compatibility. Caution: some users may still need adapters for non-standard shafts or older models.
Who it’s best for: Those who value speed and convenience when refilling line. Why: the EZ Lock system reduces the need for tools during line replacement. Limitation: may require adapters for certain brands or shaft types.
WHMYZHL 311011 Trimmer Mow Ball Head

Replacement model 311011 designed for walk-behind string trimmers. This plastic mow ball head features a hex center bearing to promote smooth operation. Best for: budget-conscious buyers targeting straightforward replacements. Why selected: direct compatibility with the 311011 part number. Caution: it is a plastic head and may wear faster under heavy debris loads.
Who it’s best for: Walk-behind users needing a cost-effective 311011-compatible head. Why: straightforward fit and hex center bearing can improve drive engagement. Limitation: durability may vary with heavy-duty workloads.
LIZEWEI Universal Walk Behind Line

Contains 30 pieces of universal walk-behind trimmer line (21.25″ long, .155″ diameter). Works with S-ENIX, Earth-Quake, B-ILT, Toro 58620 and most walk-behind mowers. Best for: cost-conscious buyers who want inexpensive, ready-to-use line spares. Why selected: bulk line assortment lowers frequent replacements. Caution: line size compatibility varies; confirm diameter for your specific trimmer model.
Who it’s best for: Casual homeowners who trim small to medium lawns occasionally. Why: large quantity of line reduces refills. Limitation: universal fit may not match every shaft or feed mechanism perfectly.
YAQINGMY 311011 Trimmer Mow Ball Head

Contains 1 x Trimmer Mow Ball/Plastic Mow Ball Head Hex Center, compatible with walk-behind string trimmer mowers. Dimensions: diameter 4″ and height about 3 3/4″. Best for: users needing a direct 311011-compatible head with standard sizing. Why selected: consistent with common 311011 replacement needs. Caution: verify exact diameter/height match to avoid fit issues.
Who it’s best for: Walk-behind trimmer owners replacing a similar 311011 head. Why: hex center design supports smooth operation. Limitation: sizing must be checked against the specific model’s requirements.
RO6G Walk Behind String Trimmer Mow Ball (2 Pack)

2-pack Mow Ball replacement for walk-behind trimmers, part number 311011. Designed for compatibility with DR and other walk-behind trimmer components. Best for: users who want two replacement heads to stock up for future maintenance. Why selected: value in multi-pack and compatibility with common DR-series walk-behind mowers. Caution: check shaft compatibility with your specific DR or AFI model before purchasing.
Who it’s best for: Homeowners who prefer stocking up and avoiding downtime from single-head replacements. Why: two-pack offers continued service between replacements. Limitation: may not fit non-DR brands without adapters.
DCNWLBB 311011 Walk Behind Mow Ball Head (2 Pack)

Two-pack Mow Ball Head with part number 311011. Marketed for walk-behind weed eaters and string trimmers, aiming at maintaining drive shaft fit and reducing slipping. Best for: buyers who want reliable performance with a common 311011 head. Why selected: dual-pack offers value and redundancy. Caution: verify the exact shaft engagement and center bearing compatibility with your unit.
Who it’s best for: Walk-behind trimmer owners seeking durable heads and a cost-efficient two-pack option. Why: ensures steady operation and easier maintenance. Limitation: plastic construction may wear with heavy debris or rough soil contact.
Buying Guide
What should you consider when buying a walk-behind trimmer head?
- Compatibility: Confirm part numbers (such as 311011) and model compatibility with Husqvarna, Craftsman, DR, and other brands.
- Head type: Choose between a full mow ball kit, a universal head, or a simple line replacement head based on your needs.
- Material and durability: Plastic mow balls are common and affordable; metal or reinforced components offer longer life in tough conditions.
- Installation effort: EZ Lock designs and complete kits reduce downtime; consider whether you prefer tool-free changes or traditional mounting.
- Maintenance frequency: Heads and lines endure debris and sun exposure. Stocking up with a two-pack can reduce downtime.
- Size and fit: Check diameter and height (for example, 4″ diameter and 3 3/4″ height) to ensure proper engagement with the drive shaft.
How do I know which head to choose?
Choose based on your mower brand, model compatibility, and how often you perform maintenance. If you want a simple, direct replacement for a known part number, a specific 311011-compatible head is a good fit. If you value speed of line changes, an EZ Lock option may be best. If you need a single kit with mounting hardware, a full carrier plate kit could be preferable.
What maintenance should accompany a new head?
Regularly inspect drive shafts for wear, monitor line length and diameter compatibility, and keep fasteners tightened to avoid slippage. For plastic heads, avoid hard impacts with rocks that could crack the ball or bearing assembly.
Are two-packs worth it?
Two-packs save time and reduce downtime by ensuring a ready replacement. They are particularly advantageous for commercial or high-use residential users who need quick swaps after heavy trimming sessions.
What is the role of the hex center bearing?
A hex center bearing helps ensure a stable engagement with the drive shaft, reducing wobble and improving power transmission during trimming tasks. This feature is common in several 311011-compatible heads.
What about universal line compatibility?
Universal line heads fit a wide range of line diameters and brands, but ensure the line size matches your trimmer’s spec. Incompatible line sizes can reduce cutting efficiency or increase wear on the head.
FAQ
- Q: Can these heads fit all walk-behind trimmers? A: Many are designed for common parts numbers like 311011 and broad brand compatibility, but always verify model compatibility with the seller.
- Q: Do I need tools to install the EZ Lock head? A: No, EZ Lock designs are intended to simplify installation with minimal tools.
- Q: Is a full kit better than a single head? A: A full kit is convenient for a complete replacement; a single head suffices if you only need to replace one worn part.
- Q: Are plastic mow balls durable? A: They offer good value and adequate durability for most residential tasks, though heavy-duty use may wear them faster than metal options.
- Q: Do two-packs always save money? A: They save time and can reduce downtime, but compare per-unit cost to single-head purchases.
- Q: How do I confirm sizing? A: Check the product dimensions (diameter and height) and compare with your mower’s shaft and housing specifications.