Briggs & Stratton PXi Series™ Engines

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Maximize the performance of your equipment with our top-of-the-line PXi Series push mower engines. They’re the most powerful we offer and include professional-grade components to handle the toughest jobs, season after season. Our ReadyStart® starting technology for easy, 1-step starting comes standard, and you can enhance your mowing experience with our noise-reducing technology that’s up to 50% quieter.**

  • Easy, no prime, no choke starting.
  • Made in the USA of US and global parts.
  • Noise-reducing Quiet Power Technology® (optional).

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Specs

Model Number
121R

Torque (ft-lbs, gross)*
8.5

Engine Displacement (cc)
190

Number of Cylinders
Single

Engine Configuration
Vertical Shaft

OHV Engine
true

Length (in)
15.8

Width (in)
12.8

Height (in)
9.4

Weight (lbs)
24.3

Bore (in)
2.69

Stroke (in)
2.04

Engine Fuel
Gasoline

Fuel Tank Capacity (gal)
0.27

Oil Capacity (oz)
18

Lubrication System
Dura-Lube Splash Lubrication

Oil Filter
Optional

Starter
ReadyStart® Starting System

Air Filter
Dual-Sealing Commercial-Grade Air Cleaner

Muffler
Super Lo-Tone™

Fuel Shutoff Valve
Optional

Certified Power Rating

*All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.

Torque (ft-lbs, gross)*
10

Engine Displacement (cc)
223

Number of Cylinders
Single

Engine Configuration
Vertical Shaft

OHV Engine
true

Length (in)
15.8

Width (in)
13.4

Height (in)
10.1

Weight (lbs)
31

Bore (in)
2.91

Stroke (in)
2.04

Engine Fuel
Gasoline

Fuel Tank Capacity (gal)
0.3

Oil Capacity (oz)
18

Lubrication System
Dura-Lube Splash Lubrication

Oil Filter
Optional

Starter
ReadyStart® Starting System

Air Filter
Dual-Sealing Commercial-Grade Air Cleaner

Muffler
Super Lo-Tone™

Fuel Shutoff Valve
Optional

Certified Power Rating

*All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.