The Jacobsen GP400 Diesel is a versatile ride-on reel mower. With the tightest frequency of clip, using Jake’s 15 blade reel, along with a trustworthy Kubota® engine, everything has been designed to assist you. The GP400 offers our greatest reel section, configured for fine sports turf. A swing-out center unit and easy maintenance get the mower on the golf course quickly.

Adjustable Reel Drop and Adjustable Reel Sequence along with simple operation and ergonomically designed controls keep you there until the work is done.

Key Features of the Jacobsen GP400 Diesel Ride-On Reel Mower

  • Ergonomically designed dashpanel incorporating joystick controls
  • Unique swing out center cutting unit for ease of service
  • Trustworthy Kubota® engine
  • Rear cutting unit sequencing
  • Easy access grill
  • On-board backlapping
  • Front reel soft-drop
  • ROPS as standard

Brand: Jacobsen
Reels and Blades 
Number and Sizes 3 x 22” (55.88cm) reels; 5” (127mm) diameter 
Blade Material Hardened high carbon steel
Cutting Unit Lift  Hydraulic double action cylinders; parallel link head leveling system
Cutting Frequency 7 Blade: 0.079”/mph (1.24mm/kph), 15 Blade: 0.037”/mph (0.58mm/kph)


Traction, Brakes and Speed  
Traction Drive         Hydraulic motor on each drive wheel, optional 3WD
Reel Drive               Gear-type hydraulic motor; backlap control valve standard
Hydraulic System                6.8 gal. (25.7L) capacity; 10 micron, full- Flow Filtration; biodegradable hydraulic fluid; oil cooler standard
Service Brakes Hydrostatic braking
Parking Brakes        6” (152mm) caliper disc, hand operated
Steering Power Steering
Mowing Speed 3.7mph (6kph)
Transport Speed 0 - 7.5mph (0 - 12kph)


 Weight and Dimensions 
 Weight (excluding fuel) 1235 - 1578lb (560 - 716.3kg)
 Length (less catchers)  83" (2.12m)   
 Overall Height (including ROPS)  67.7" (1.72m)   
 Wheelbase  51.2" (1.30m)   
 Transport Width  74.5" (1.89m)   
 Working Width  74.5" (1.89m)   


 Mower Warranty                                                                    2 Years                   
  • 55.9cm (22”) Front rollers ranging from 5.1cm (2”) to 5.7cm (2¼”) – solid tube steel, grooved assembled or machined aluminum or steel
  • Grass catcher kit (new Eclipse style)
  • Turf Groomer®
  • Quick roll greens roller (set of 3)
  • Spiker attachment with frame assembly
  • 22” (55.9cm) front roller fine bristle brush
  • Powered rear roller brush for 12.7 x 55.9cm (5” x 22”) cutting unit
  • High cut kit – 2.4cm (15⁄16”) when used with .5cm (2 3⁄16”) roller
  • GP400 3WD kit
  • Automatic mow speed selection kit
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