- Model G 42 SP - Stump Grinder



Aimed at modest landscapers and stump grinding contractors, as well as rental stores, the Morbark G 42 SP Stump Grinder is an ideal unit for grinding smaller stumps. Its compact size and mobility allows it to be driven to sites that couldn’t be reached with larger stump grinders. Equipped with horsepower options of either 25 or 35 HP, this stump grinder really packs a punch. With a choice of three cutting system options, you can customize your grinder to best fit your needs. No other manufacturer offers this wide a variety of cutting system choices. Standard equipment on the Morbark G 42 SP Stump Grinder includes 4-up comfort grip fingertip controls, an electric clutch with cutting system brake and high-gloss Morthane paint.

4-up Fingertip Controls
Operator’s control station with 4-up fingertip controls gives you complete control of the machine functions from one location.

Electric Clutch
Electronic clutch engagement with cutting system brake eliminates cumbersome belt tensioning systems and increases operator safety.

Boom Pivot Assembly
Heavy-duty boom pivot is enhanced in critical areas for extended service life.

Clic Duals Option
Requiring no tools, Morbark’s exclusive spring-loaded Clic Duals cut dual wheel removal and installation time in half versus bolt-on dual wheel configuration.


Length: 8’9″
Width (w/o dual wheels) : 35″
Height: 4’9″
Gross weight: 1,620 lbs.

Engine: Kohler
Horsepower: 27 to 38 HP

Fuel capacity: 9 gallons
Hydraulic oil capacity: 3 gallons

Boom arc swing: 42″
Boom travel up: 12 ¼”
Boom travel down: 10 ¾”

Tires: (4) 5.70-8

Primary drive: V-Belt
Secondary drive: V-Belt

Cutter wheel speed: 1,317 RPM

Equipment Highlights

Electronic cutter head engagement with electronic shut-down brake

Two-speed ground travel from 0-188 FPM

160cc hydraulic drive motor with 3:1 drive torque multiplier and hydraulic actuated parking brake with 3,700 in/lb of holding force

1 ¾” diameter, 4140 hardened cutter head shaft with pillow block cutter head bearings

Steel hood enclosure protecting hydraulic components, fuel and hydraulic reservoirs

Oscillating front axle for stability over rough or uneven terrain

3″ square x 3/16″ thick wall tubular steel frame structure

(4) 5.70 x 8″ tires

Hydraulic system with .33 ci dual displacement gear pump, four spool mono block control valve and geroler type drive motor

Morthane Paint System: A chemically cured, electrostatically applied urethane coating with high-gloss finish, built-in UV protection, chip and chemical resistance and corrosion protection


  • Hillside Cutting System with Tomahawk hardware and 3 x 18 tooth pattern
  • MultiTip Cutting System with 6 replaceable teeth
  • Leonardi M1 Blue Shark cutting system
  • Dual Wheel Package with spring-loaded Clic duals
  • Custom paint and logo packages

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