STIHL TrimCut C 42-2 Trimmer Head 40037102122 – Dual Line Replacement Head for STIHL Brushcutters

The STIHL TrimCut C 42-2 trimmer head is a heavy-duty dual line replacement head designed for STIHL string trimmers and brushcutters. Built for durability and professional performance, this trimmer head is ideal for cutting thick grass, clearing weeds, and maintaining large properties or commercial landscapes.

This is the replacement superseded model of the stihl trimcut 41-2

Designed with a quick outside line refill system, the TrimCut C 42-2 allows you to replace trimmer line without opening the housing, reducing downtime and making maintenance fast and simple. Whether you’re a homeowner maintaining a large yard or a professional landscaper, this STIHL trimmer head delivers dependable cutting power and long service life.

Dual-Line Cutting System for Maximum Cutting Power

The STIHL TrimCut C 42-2 string trimmer head uses a dual-line cutting system, allowing two pieces of trimmer line to operate simultaneously. This design provides a wider cutting swath and more aggressive cutting performance compared with single-line heads.

It is ideal for:

• Thick grass

• Overgrown lawn edges

• Weeds and dense vegetation

• Property maintenance and landscaping

The dual-line setup improves efficiency and helps you finish trimming jobs faster.

Quick Outside Line Refill – No Disassembly Required

One of the most practical features of the TrimCut C 42-2 trimmer head is the external line refill system.

Instead of opening the entire trimmer head, you can insert replacement trimmer line directly from the outside, saving valuable time during yard work or landscaping jobs.

Benefits include:

• Faster line replacement

• Reduced downtime

• Easier field maintenance

• Less frustration during trimming jobs

Large Line Capacity and Flexible Line Options

The STIHL TrimCut C 42-2 head is optimized for 0.095 inch (2.4 mm) trimmer line, which is the most common size used on professional and residential STIHL trimmers.

For tougher cutting conditions, it can also run 0.105 inch (2.7 mm) trimmer line, giving you flexibility when dealing with heavier weeds and vegetation.

Line Capacity

• Holds up to 24 ft (7.3 m) of 0.095″ trimmer line

This larger capacity allows you to trim longer before needing to reload the line.

Compatible STIHL Trimmers and Brushcutters

The STIHL TrimCut C 42-2 replacement trimmer head fits a wide range of STIHL gas and battery-powered machines.

Compatible models include:

• STIHL FS 55 / FS 55 R

• STIHL FS 56 C-E / FS 56 RC-E

• STIHL FS 70 C-E / FS 70 RC-E

• STIHL FS 91

• STIHL FS 94 C-E / FS 94 RC-E

• STIHL FS 111

• STIHL FS 131

• STIHL FS 240 C-E

• STIHL FR 131 T

• STIHL FR 460 TC-EFM

• STIHL FSA 90 / FSA 90 R

• STIHL FSA 135 / FSA 135 R

• STIHL FS-KM KombiTool attachment

This wide compatibility makes it an excellent OEM replacement trimmer head for many popular STIHL models used across the United States.

Ergonomic Design for Comfortable Operation

The TrimCut C 42-2 head is designed for both performance and ease of use.

Features include:

• Grip contours on the spool for easy handling

• Manual tightening capability for secure installation

• Low vibration operation for improved comfort

• Durable construction built for demanding trimming work

These design elements make the trimmer head easier to maintain and more comfortable to use during extended trimming sessions.

Professional Tip: Extend the Life of Your Trimmer Line

For best performance, soak new trimmer line in water for 12–24 hours before installing it in the trimmer head.

Pre-soaking helps:

• Increase line flexibility

• Reduce brittleness

• Prevent premature breakage

• Improve cutting durability

This simple step can significantly extend the life of your trimmer line.

STIHL TrimCut C 42-2 Trimmer Head – Key Features

• Heavy-duty dual-line trimmer head

• Outside refill system for fast line replacement

• Supports 0.095″ and 0.105″ trimmer line

• 24 ft line capacity with 0.095″ line

• Compatible with many STIHL gas and battery trimmers

• Durable construction for grass, weeds, and light brush

• Ergonomic spool design for easy maintenance

• Reduced vibration for greater comfort

Technical Specifications

Frequently Asked Questions

What trimmer line size works with the STIHL TrimCut C 42-2?

The recommended line size is 0.095 inch (2.4 mm). The head can also use 0.105 inch (2.7 mm) line for heavier cutting conditions.

Does the STIHL TrimCut C 42-2 require opening the head to change line?

No. The outside refill system allows trimmer line to be replaced without opening the head, making line changes quick and easy.

Is the TrimCut C 42-2 compatible with the STIHL FS 91?

Yes. The STIHL FS 91 brushcutter is fully compatible with the TrimCut C 42-2 trimmer head.

Can this trimmer head be used on battery-powered STIHL trimmers?

Yes. It is compatible with STIHL battery trimmers including the FSA 90 and FSA 135 series.