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 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 (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
Download Power Curve

*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
Download Power Curve

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