Billy Goat SG1301 Series Stump Grinder, Honda GX390 11 Hp, 24" Above Grade and 16" Below Grade, Carbide Cutting Teeth

The Billy Goat SG1301 Series Walk-Behind Stump Grinder is a professional stump-removal machine designed for landscapers, tree-care contractors, property maintenance crews, and equipment rental businesses. Powered by an 11 HP Honda GX390 engine, it offers a cutting capacity of 24 in (61.0 cm) above ground and 16 in (40.6 cm) below ground. Its extended frame, adjustable handle, reinforced cutting-head guard, and eight replaceable carbide cutting teeth help operators remove stumps efficiently while maintaining control during grinding and transportation.

KEY FEATURES

• EXTENDED ANGLED-DOWN FRAME: The extended frame angles toward the cutter head to provide greater reach when grinding large or difficult-to-access stumps. Its reinforced construction supports demanding professional use while helping operators position the cutting wheel effectively.
• DUAL HANDLE WITH LONG REACH: Dual handholds and accessible engagement controls allow operators to activate the cutter head from different handle positions and cutting depths. The extended handle provides additional leverage when sweeping the cutting wheel across a stump, helping reduce physical effort.
• CHIP GUARDING: Side and rear chip curtains help contain flying wood chips during grinding. Combined with the double-welded cutter-head guard, they provide additional protection around the cutting area when the machine is operated according to its safety instructions.
• BELT SPAN & BELT GUARD: The extended belt span is designed to support dependable power transmission and reduce belt wear. A durable belt guard protects the drive components from debris and helps extend service intervals.
• EIGHT CARBIDE CUTTING TEETH: The cutting wheel is equipped with eight replaceable carbide teeth mounted in heavy-duty holders. These serviceable cutting components support effective stump removal and allow operators to replace worn teeth without replacing the complete cutting wheel.
• EMERGENCY STOP SWITCH: A conveniently accessible emergency stop switch provides a way to shut down the machine when an immediate stop is required. This additional safety control supports operator protection during demanding stump-grinding applications.
• FOOT MOUNT: The integrated foot mount provides additional leverage and stability when starting the engine. It helps operators maintain control of the machine during the starting procedure.
• BRAKE RELEASE LEVER: The brake release lever allows operators to engage or release the machine's brake when preparing for grinding or transportation. This simplifies repositioning and helps secure the stump grinder at the work site.
• LOCKING DRUM BRAKE: The locking drum brake holds the machine in position while the operator sweeps the cutting head back and forth across a stump. This provides a stable pivot point and supports controlled grinding.
• HANDLE ADJUST LEVER: The adjustable handle can be positioned to suit the operator and the cutting depth. This helps maintain leverage, stability, and comfortable control when grinding above or below ground level.
• EXTENDED VERTICAL CUTTING RANGE: The SG1301 Series can grind up to 24 in (61.0 cm) above grade and 16 in (40.6 cm) below grade. This range allows operators to tackle tall stumps and grind remaining material below the surrounding ground level.
• BALANCED WALK-BEHIND DESIGN: The machine is balanced over its axle to simplify movement and side-to-side cutting-head operation. Its push-operated design and pneumatic wheels also make it practical to load onto a suitable pickup truck or trailer using properly rated ramps.
• HONDA GX390 ENGINE: The 389 cc (23.7 cu in) Honda GX390 engine delivers a rated 11 HP for demanding stump-removal applications. Its pull-start configuration provides a straightforward starting system for professional crews and rental operators.

APPLICATIONS / USE CASES

• RESIDENTIAL STUMP REMOVAL: The SG1301 Series removes unwanted tree stumps from residential lawns and landscaped properties. Its adjustable handle and extended cutting range help operators work on stumps of different heights and sizes.
• PROFESSIONAL TREE-CARE SERVICES: Tree-service contractors can use the machine to grind remaining stumps after tree removal. Replaceable carbide teeth and a reinforced cutting system support regular use across demanding jobs.
• LANDSCAPE RENOVATION: The grinder removes stump material that interferes with new lawns, planting beds, and landscape improvements. Its ability to cut below ground level helps prepare an area for subsequent landscaping work.
• COMMERCIAL PROPERTY MAINTENANCE: Grounds-maintenance crews can remove unwanted stumps from commercial landscapes and managed properties. The walk-behind design and balanced chassis make the machine practical for moving between multiple work areas.
• BELOW-GRADE STUMP GRINDING: The cutter head reaches up to 16 in (40.6 cm) below grade to remove remaining stump material beneath the surrounding soil surface. This capability is useful when preparing a site for lawn restoration or additional landscape work.
• TALL STUMP REMOVAL: The machine's ability to grind up to 24 in (61.0 cm) above grade reduces the need to cut every stump flush with the ground before grinding. Its long handle provides leverage when working across the extended cutting range.
• MUNICIPAL AND PARK MAINTENANCE: Maintenance crews can use the stump grinder to remove tree stumps from parks, public landscapes, and other maintained green spaces. Its reinforced frame and replaceable cutting teeth support recurring stump-removal work.
• EQUIPMENT RENTAL APPLICATIONS: The accessible controls, adjustable handle, and balanced chassis make the SG1301 Series suitable for rental fleets serving qualified operators. Replaceable teeth and serviceable drive components also support routine maintenance between rentals.

WHAT'S INCLUDED

• One Billy Goat SG1301 Series walk-behind stump grinder in the selected cutting-tooth configuration
• Honda GX390 engine with pull / recoil start
• Cutting wheel with eight carbide teeth in the selected standard or Greenteeth® configuration
• Reinforced frame with extended angled-down cutter-head support
• Double-welded cutter-head guard
• Side and rear chip curtains
• Dual handholds with extended adjustable handle
• Cutting-head engagement controls
• Emergency stop switch
• Foot mount for starting stability
• Brake release lever and locking drum brake
• Belt drive with protective belt guard
• Pneumatic transport wheels

Optional replacement teeth, auger components, adapters, and other listed accessories are sold separately unless otherwise specified. Accessory compatibility should be confirmed before ordering.

MACHINE OPTIONS

• SG1301H – STANDARD TEETH: The SG1301H is equipped with eight standard tungsten-carbide cutting teeth for professional stump grinding. Powered by a 389 cc (23.7 cu in) Honda engine, it offers a cutting capacity of 24 in (61.0 cm) above grade and 16 in (40.6 cm) below grade.
• SG1301HGT – GREEN TEETH: The SG1301HGT features eight tungsten-carbide Greenteeth® cutting teeth as an alternative cutting configuration. It shares the same Honda engine, cutting capacity, drive arrangement, and overall dimensions as the standard-tooth model.

OPTIONAL ACCESSORIES

The following accessories are listed as available options. Several are auger-related components rather than conventional stump-grinder cutting-wheel parts; confirm their intended application and compatibility with the SG1301 Series before purchasing.

• TOOTH AUGER DIRT WITH INSERT: This replaceable auger tooth is designed for compatible dirt-drilling applications and includes an insert. It provides a service option for an appropriate auger cutting assembly; verify equipment compatibility before ordering.
• TOOTH AUGER HARDFACED WITH INSERT: This hardfaced auger tooth includes an insert and is intended for compatible drilling applications. Its wear-resistant cutting surface provides an alternative to standard auger teeth when servicing the appropriate equipment.
• WISDOM TOOTH (HARDFACE): This hardfaced replacement tooth provides a wear-resistant cutting option for a compatible tooth-holder assembly. Confirm its mounting requirements and intended equipment application before installation.
• WISDOM TOOTH (CARBIDE): This carbide replacement tooth provides a durable cutting option for compatible equipment. Its replaceable design allows operators to service worn cutting components without replacing the complete assembly.
• PILOT BIT (DIRT): This pilot bit is intended for compatible auger applications involving soil. It helps initiate and guide the cutting assembly during drilling when installed on the appropriate equipment.
• WELD-ON DRIVE LUG: This drive lug is intended for welded installation on a compatible drive assembly. It provides a replacement or fabrication component where the specified drive connection is required.
• TOOTH AUGER CARBIDE WITH INSERT: This carbide auger tooth includes an insert for compatible drilling equipment. The carbide cutting surface provides a wear-resistant option for demanding applications.
• PILOT BIT (CARBIDE): This carbide pilot bit provides a wear-resistant option for compatible auger cutting assemblies. It is intended to guide the auger during drilling while withstanding demanding cutting conditions.
• 1-3/8 IN (34.9 MM) HEX BIT ADAPTER: This adapter provides a 1-3/8 in (34.9 mm) hex connection for compatible drilling equipment. Verify the required drive interface and intended application before ordering.
• 1-1/4 IN (31.8 MM) SQUARE BIT ADAPTER: This adapter provides a 1-1/4 in (31.8 mm) square connection for compatible drilling equipment. It allows an appropriate bit or attachment to be connected when the equipment uses the matching drive interface.
• PILOT BIT (HARDFACE): This hardfaced pilot bit is intended for compatible auger applications requiring a wear-resistant cutting component. It helps guide the drilling assembly when installed on the correct equipment.
• AUGER BIT – 8 IN (20.3 CM) OD × 36 IN (91.4 CM) LONG, DIRT – RED: This red dirt auger bit has an outside diameter of 8 in (20.3 cm) and a length of 36 in (91.4 cm). It is intended for compatible soil-drilling equipment; confirm drive compatibility before ordering.
• AUGER BIT – 12 IN (30.5 CM) OD × 42 IN (106.7 CM) LONG, DIRT – RED: This red dirt auger bit has an outside diameter of 12 in (30.5 cm) and a length of 42 in (106.7 cm). Its larger diameter provides an alternative hole size for compatible drilling equipment.

TECHNICAL SPECIFICATIONS – SG1301H (STANDARD TEETH)

• MANUFACTURER: Billy Goat
• PRODUCT SERIES: SG1301
• MODEL: SG1301H
• PRODUCT TYPE: Walk-behind stump grinder
• ENGINE BRAND: Honda
• ENGINE MODEL: GX390
• ENGINE POWER: 11 HP (8.2 kW)
• ENGINE DISPLACEMENT: 23.7 cu in (389 cc)
• STARTER TYPE: Pull / recoil
• DRIVE: Push
• CUTTING DISC SPEED: 1,575 RPM with engine operating at 2,500 RPM
• CUTTER DISC DIAMETER: 14 in (35.6 cm)
• ABOVE-GRADE CUTTING CAPACITY: 24 in (61.0 cm)
• BELOW-GRADE CUTTING CAPACITY: 16 in (40.6 cm)
• NUMBER OF CUTTING TEETH: 8
• CUTTING TEETH TYPE: Standard tungsten carbide
• CUTTING-HEAD GUARD: Double-welded
• CHIP PROTECTION: Side and rear chip curtains
• BRAKE: Locking drum brake with release lever
• HANDLE: Extended dual-handle design with height adjustment
• EMERGENCY STOP SWITCH: Included
• WEIGHT: 330 lb (149.7 kg)
• LENGTH: 85–100.5 in (215.9–255.3 cm)
• WIDTH: 30.06 in (76.4 cm)
• HEIGHT: 37.5–59 in (95.3–149.9 cm)
• WHEELS: 4.8 × 8 in (12.2 × 20.3 cm) pneumatic

TECHNICAL SPECIFICATIONS – SG1301HGT (GREEN TEETH)

• MANUFACTURER: Billy Goat
• PRODUCT SERIES: SG1301
• MODEL: SG1301HGT
• PRODUCT TYPE: Walk-behind stump grinder
• ENGINE BRAND: Honda
• ENGINE MODEL: GX390
• ENGINE POWER: 11 HP (8.2 kW)
• ENGINE DISPLACEMENT: 23.7 cu in (389 cc)
• STARTER TYPE: Pull / recoil
• DRIVE: Push
• CUTTING DISC SPEED: 1,575 RPM with engine operating at 2,500 RPM
• CUTTER DISC DIAMETER: 14 in (35.6 cm)
• ABOVE-GRADE CUTTING CAPACITY: 24 in (61.0 cm)
• BELOW-GRADE CUTTING CAPACITY: 16 in (40.6 cm)
• NUMBER OF CUTTING TEETH: 8
• CUTTING TEETH TYPE: Tungsten-carbide Greenteeth®
• CUTTING-HEAD GUARD: Double-welded
• CHIP PROTECTION: Side and rear chip curtains
• BRAKE: Locking drum brake with release lever
• HANDLE: Extended dual-handle design with height adjustment
• EMERGENCY STOP SWITCH: Included
• WEIGHT: 330 lb (149.7 kg)
• LENGTH: 85–100.5 in (215.9–255.3 cm)
• WIDTH: 30.06 in (76.4 cm)
• HEIGHT: 37.5–59 in (95.3–149.9 cm)
• WHEELS: 4.8 × 8 in (12.2 × 20.3 cm) pneumatic

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What is the difference between the SG1301H and SG1301HGT?

The SG1301H is equipped with eight standard tungsten-carbide cutting teeth, while the SG1301HGT features eight tungsten-carbide greenteeth cutting teeth. Both models share the same engine, cutting capacity, weight, and overall dimensions.

2. How far above and below ground can the SG1301 Series grind?

The machine can grind up to 24 in (61.0 cm) above grade and 16 in (40.6 cm) below grade. This cutting range accommodates tall stumps and allows operators to remove remaining stump material beneath the surrounding soil surface.

3. What engine powers the Billy Goat SG1301 Series?

Both models are powered by an 11 HP (8.2 kW), 389 cc (23.7 cu in) Honda GX390 engine with a pull-start system. The engine drives the cutting wheel through a belt-drive arrangement.

4. How does the locking drum brake help during stump grinding?

The locking drum brake holds the machine in position while the operator sweeps the cutting head across the stump. A separate release lever allows the brake to be disengaged when the machine needs to be repositioned or transported.

5. Are the cutting teeth replaceable, and what is the cutting wheel diameter?

Both models use eight replaceable carbide cutting teeth, with standard and greenteeth configurations available. The supplied technical specifications list a cutting disc diameter of 14 in (35.6 cm), although the product description also references a 15.5 in (39.4 cm) cutting wheel; confirm the applicable wheel diameter for the specific machine before ordering replacement components.