Simplicity 5901799

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Vanguard™ Big Block Engine

For the most challenging applications, this Big Block engine with EFI has been expertly engineered to deliver the dependability to get more done in less time. Plus, the 500-hour oil change interval with the Oil Guard System means less time changing the oil and more time mowing.


The 4-wheel suspension system and adjustable rear coil-over shocks reduces vibration to the chassis and operator, giving you a smoother ride at fast mowing speeds.

Fabricated Mowing Deck

An innovative grass cutting system has the center point offset, allowing for supreme cutting and excellent discharge leaving you with a superior cut. The reinforced leading edge provides protection where the mower deck needs it most. Large deck options are available with cutting widths up to 72" so you can make quick work of any size lawn. (Image is for representation purposes only and doesn't reflect the final product.)

High Quality Drive System

Dual, commercial Hydro-Gear® ZT-5400 Powertrain® transaxles deliver unmatched power and durability.


Model 5901799
Marketing Model 37/72
Engine Brand Briggs & Stratton Vanguard Big Block V-Twin w/ EFI
Start Type Electric
Power Rating * 37 gross hp 1/2
Choke/Throttle No Choke
Engine Displacement (cc) 993
Fuel Tank Capacity (gal) 11 (Twin 5.5 Gallon Tanks)
Battery(cca) 350
Transmission Type Hydro-Gear® ZT-5400®
Ground Speed-Fwd (mph) 0 - 12.0
Ground Speed-Rev (mph) 0 - 6.0
Brake Separate Lever
Frame 12-Gauge Steel
Front Tires (in) 13 x 6.5
Front Axle 1.5" x 2" Welded
Rear Tires (in) 26 x 12
Seat 18" High-Back Mesh
Suspension Front & Rear
Cutting Width (in) 72
Mower Deck Type Fabricated
Height-of-Cut (in) 1.5 - 5
Height-of-Cut Positions 16
Number of Blades 3
Blade Engagement Electric PTO Switch
Mower Deck Removal Frame Mounted
Anti-Scalp Wheels 3 Front / Rear Flap
Spindle Cast-Iron
Cargo Bed + N/A
Steering Twin Levers
Headlights Optional
Fuel Level Indicator Standard Gauge / Right & Left Hand Console
Cup Holder Standard
Assembled Length (in) 86
Rear Bumper Standard
Roll Over Protection (ROPS) Folding
Assembled Width (in) 87
Assembled Height (in) 72