Husqvarna 537388101 T35 Universal Trimmer Head with Line – Genuine OEM Replacement Head

Part Number: 537388101
Category: String Trimmer Heads, Spools & Cutting Line Components
Type: T35 Universal Tap Advance Trimmer Head with Line – Genuine OEM Replacement Head

The Husqvarna 537388101 T35 Universal Trimmer Head with Line is a genuine Husqvarna replacement cutting head designed for straight-shaft string trimmers and brushcutters. The T35 Universal uses Husqvarna's semi-automatic Tap'n Go / Tap Advance line-feed system, allowing the operator to advance additional cutting line by tapping the trimmer head against the ground while the equipment is running.

Product Specifications

• Part Number: 537388101
• Manufacturer: Husqvarna
• Product Type: Universal Trimmer Head
• Series: T35
• OEM Description: T35 Trimmer Head Universal
• Feed Type: Semi-Automatic Tap Advance / Tap'n Go
• Application: String Trimmer / Brushcutter
• Shaft Application: Straight-Shaft Equipment
• Arbor: 10 mm Universal / Multiple Adapters
• Recommended Engine Size: 25–35cc
• Trimmer Line Compatibility: .065", .080", .095" & .105"
• Pre-Wound Line: .095" Titanium Force™ Trimmer Line
• Line Capacity: Up to 28 ft. of .095" Line
• Spool Design: Split Spool
• Eyelet Design: Open Eyelet
• Replaceable Components: Yes
• Compatible Brands: Husqvarna / Stihl / Echo / RedMax / Shindaiwa / Poulan – Model Dependent
• Replacement Type: Genuine Husqvarna Replacement Trimmer Head
• Condition: New
• Quantity: 1 Trimmer Head with Line & Applicable Universal Adapters
• Part Number Reference: 537388101
• Alternate Number Format: 537 38 81-01
• UPC: 705788212767

Husqvarna officially lists UPC 705788212767 for SKU 537388101 and identifies the T35 Universal for 25–35cc equipment.

Features & Benefits

• Genuine Husqvarna replacement trimmer head
• Professional T35 Tap Advance design
• Universal configuration for many straight-shaft trimmers
• Semi-automatic line-feed system
• Tap the head against the ground to advance cutting line
• Line can be advanced while operating the equipment
• Easy-to-reload removable spool
• Spool comes off with the cap for convenient reloading
• Split spool design helps reduce line tangling
• Helps reduce line welding inside the spool
• Directional arrows indicate proper line winding
• Two key slots help hold line during reassembly
• Open eyelets simplify feeding line through the head
• Replaceable internal components
• Pre-wound with .095" Titanium Force™ line
• Holds up to 28 feet of .095" line
• Supports multiple cutting-line diameters
• Designed for 25–35cc applications
• Compatible with many popular trimmer brands
• Suitable for professional and property-maintenance applications

Husqvarna specifically designed the spool so it can be removed with the cap, eliminating the need to turn the trimmer upside down while reloading. The split spool and line-locking slots are designed to make winding and reassembly easier.

Universal Compatibility

One of the main advantages of 537388101 is its universal mounting configuration.

Husqvarna states that this version fits most straight-shaft trimmers from:

• Husqvarna
• Stihl
• Echo
• RedMax
• Shindaiwa
• Poulan

Husqvarna's current documentation describes 537388101 as the universal 10 mm arbor version with multiple arbors/adapters.

The universal package includes adapter configurations such as:

• M10 x 1.25 LH
• M8 x 1.25 LH
• M10 x 1.0 LH
• Spacer
• Additional applicable universal mounting hardware

The exact adapter required depends on the trimmer's output shaft and thread configuration.

Documented Husqvarna Applications

Husqvarna's current product information specifically lists the T35 Universal for models including:

• Husqvarna 130L
• Husqvarna 330LK

Husqvarna's accessory documentation also describes the universal T35 as fitting most 100–500 Series straight-shaft trimmers and brushcutters, subject to the applicable shaft/thread configuration.

Because this is a universal head, compatibility should be determined by the equipment's shaft, thread direction, arbor size, and applicable adapter—not solely by brand.

Tap Advance Line Feed

The T35 Universal uses a semi-automatic line-feed system Husqvarna calls Tap'n Go.

During operation:

1. The trimmer head rotates at operating speed.
2. The operator taps the head against the ground.
3. The mechanism releases additional cutting line.
4. Centrifugal force extends the line outward.
5. The operator continues trimming without stopping to manually pull additional line.

This allows the operator to control when additional line is released without shutting down the machine or removing it from a harness.

Easy-Reload Split Spool

The T35 incorporates a split spool designed to simplify line installation.

The design provides several advantages:

• Helps reduce line tangling
• Helps reduce line welding
• Separates the two line sections
• Directional arrows indicate winding direction
• Key slots hold the line during reassembly
• Spool removes together with the cap
• Open eyelets simplify line installation

These features make routine line replacement easier compared with basic trimmer-head designs.

Trimmer Line Compatibility

The 537388101 T35 Universal accepts several common trimmer-line diameters:

• .065 inch
• .080 inch
• .095 inch
• .105 inch

The head comes factory pre-wound with .095-inch Titanium Force™ trimmer line and can hold approximately 28 feet of .095-inch line.

This allows the head to accommodate different cutting-line requirements depending on the trimmer and intended application.

Complete Replacement Head

The 537388101 is a complete trimmer-head replacement rather than just an individual spool. OEM replacement references describe the assembly as including the housing, spool, and line.

This makes the assembly suitable when the existing trimmer head has:

• Cracked housing
• Worn tap button
• Damaged spool
• Broken line-feed components
• Excessive wear
• Damaged eyelets
• Missing internal components
• Difficulty feeding line
• Severe impact damage
• Reached the end of its usable service life

Individual T35 replacement components are also available separately for routine maintenance. Husqvarna specifically offers a replacement spool pre-wound with .095" Titanium Force line.

Common Reasons for Replacement

Replacement of the 537388101 T35 Universal Trimmer Head may be appropriate if the existing head has:

• Cracked or broken housing
• Excessively worn tap surface
• Damaged spool
• Worn eyelets
• Line-feed problems
• Damaged mounting threads
• Excessive vibration
• Missing components
• Difficulty retaining cutting line
• Damage from contact with rocks, concrete, fencing, or other hard objects
• Become unsuitable for continued operation

Before replacing the complete head, inspect the trimmer's output shaft and mounting hardware for damage.

Important Notes

• Verify compatibility with your exact string trimmer or brushcutter before ordering.
• 537388101 is the T35 Universal version; do not confuse it with other T35 configurations that use different part numbers or mounting arrangements.
• Husqvarna's official designation is T35 Universal.
• The alternate formatted part number is 537 38 81-01.
• UPC is 705788212767.
• Designed primarily for compatible straight-shaft trimmers and brushcutters.
• The universal version includes adapters allowing installation on many non-Husqvarna trimmers.
• Do not assume compatibility with every trimmer from a listed brand.
• Verify shaft diameter, arbor size, thread size, and thread direction before installation.
• The T35 Universal is designed for 25–35cc applications according to Husqvarna's current specifications.
• Comes pre-wound with .095" Titanium Force™ trimmer line.
• Holds up to approximately 28 feet of .095" line.
• Compatible line sizes include .065", .080", .095", and .105".
• Use a line diameter appropriate for the specific trimmer and application.
• Do not exceed the line diameter recommended for your equipment.
• Oversized cutting line can place additional load on the engine, clutch, shaft, and cutting-head system.
• Follow the directional arrows on the spool when winding replacement line.
• Make sure both sections of line are wound correctly and evenly.
• Use the spool's retaining slots to prevent the line from unwinding while reinstalling the cap.
• Ensure the spool, spring, cap, and other internal components are correctly seated before operation.
• Make sure the trimmer head is securely attached to the output shaft.
• Use the correct included adapter for the specific equipment.
• Verify that the head rotates in the proper direction for the equipment.
• Inspect the debris shield and line-limiting blade before operation.
• Never operate a string trimmer without the required cutting guard installed.
• Replace a trimmer head that is cracked, severely worn, unbalanced, or otherwise structurally damaged.
• Shut off the engine or motor, allow the cutting head to stop completely, and disconnect the spark plug or battery where applicable before installation or service.
• This listing is for one Husqvarna 537388101 T35 Universal Trimmer Head with Line and applicable universal adapter components. Verify current package contents if a particular adapter is required.
• Match part number 537388101 and the mounting specifications with your equipment before ordering to ensure proper fitment.