Simplicity 5901798

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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.

High Quality Drive System

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


Model 5901798
Marketing Model 37/61
Engine Brand Vanguard®
Engine Model Big Block™ V-Twin, EFI & Oil Guard Technology
Start Type Electric, Key
Power Rating 37 gross hp 
Cylinders 2
Choke/Throttle Single Control
Engine Displacement (cc) 993
Fuel Tank Capacity (gal) 11 (Twin 5.5 Gallon Tanks)
Battery(cca) 350
Transmission Type Hydro-Gear® ZT-5400 Powertrain™
Ground Speed-Fwd (mph) 0 - 12
Ground Speed-Rev (mph) 0 - 6
Brake Internal
Frame 11-Gauge
Front Tires (in) 13 x 6.5-6 / 4-Ply Smooth
Front Axle Steel Independent & Adjustable Pivoting
Rear Tires (in) 26 x 12-12 / Turf Smart
Seat 18" Suspension High-Back
Suspension SCS, Front & Rear
Cutting Width (in) 61
Mower Deck Type Fabricated
Height-of-Cut (in) 1.5 - 5
Height-of-Cut Positions 16
Number of Blades 3
Mower Deck Removal Frame Mounted
Anti-Scalp Wheels 3 Front
Spindle Cast-Iron w/ Grease Zerk
Cargo Bed + N/A
Steering Twin Levers
Headlights Optional
Fuel Level Indicator Tank Gauge
Cup Holder Standard
Bumper Steel
Roll Over Protection (ROPS) Standard, Folding
Assembled Width (in) 78
Assembled Height (in) 72
Assembled Length (in) 84.5
Blade Type Electric PTO Switch
Fuel Gauge Location Standard Gauge / Right & Left Hand Console
Rear Fenders Standard