Briggs & Stratton 104M02-0198-F1 163cc Engine – 7/8in Shaft
Briggs & Stratton 104M02-0198-F1 runs as a dependable small engine. A 163cc block backs up the output, and torque peaks at 9.83 Nm. It's built for premium walk-behind mowers.
- Runs on a 163cc engine block
- Maxes out around 9.83 Nm of torque
- A 7/8in horizontal shaft, standard mount
- Recoil pull gets it running fast
- Backed by a 2-year warranty
Description
Displacing 163cc through an overhead valve chamber, the Briggs & Stratton 104M02-0198-F1 vertical engine restores torque output to stalled push mowers. Bent 7/8-inch shafts and scored cylinders sideline hundreds of commercial walk-behind units each season. This engine combines a precision-ground 7/8-inch output shaft with a rigid lower crankcase flange that resists torsional deflection when blades hit roots.
Manual choke controls often stick open, fouling spark plugs with rich carbon soot. ReadyStart technology meters fuel based on cylinder head temperature, ensuring reliable one-pull starts in cool morning air. The splash lubrication system coats the bottom end with motor oil, maintaining hydrodynamic film strength across crank journals during long cutting shifts.
Technical Specifications of Briggs & Stratton 104M02-0198-F1
- 7/8-Inch Straight Vertical Shaft: Matches universal imperial blade adapters, drive pulleys, and commercial walk-behind decks.
- 163cc 4-Stroke OHV Engine: Supplies steady rotational force while cutting fuel consumption compared to side-valve blocks.
- ReadyStart No-Prime Starting: Meters exact fuel charges on startup without primer bulbs or manual choke levers.
- Super Lo-Tone Engine Muffler: Lowers high-frequency exhaust noise to keep mowing crews compliant with neighborhood noise limits.
- Internal Oil Slinger Paddle: Splashes continuous oil mist over internal moving components to stop friction wear.
- Mechanical Flywheel Brake Assembly: Grounds ignition and clamps the flywheel rim within seconds of bail release.
Jobsite Performance & Wear Resistance
Designed for straightforward fleet repowers, this 7/8-inch shaft engine restores factory cutting power to standard walk-behind frames.
- A heavy crankshaft journal casting and impact-tested lower oil seal flange resist stress from blade vibration.
- The high-efficiency combustion chamber squeezes maximum run time from small fuel tanks to reduce daily refills.
- Drop-in 7/8-inch shaft dimensions restore factory cutting performance to universal commercial push mower frames.
- Park maintenance departments and residential contractors reduce total repair overhead by avoiding custom deck drilling.
Target Machinery & Drop-In Fitment
Weighing 24.5 pounds dry with a universal three-hole mounting base and 7/8-inch output shaft, this engine bolts straight onto 21-inch push mowers, wheeled string trimmers, and lawn dethatchers without deck alteration.
Commercial Warranty & Preventive Maintenance
- Commercial purchasers receive two years of limited factory warranty coverage for industrial use.
- Consumer buyers receive two years of comprehensive manufacturer warranty protection.
Execute oil checks prior to starting, perform 50-hour oil changes using API-certified SAE 30 oil, tap clean the air filter element weekly, and maintain the spark plug gap at 0.020 inches. Order the Briggs & Stratton 104M02-0198-F1 vertical shaft engine from Mulmotor.com for guaranteed factory-fresh units, complete manufacturer warranty coverage, and dedicated commercial equipment support.
Briggs & Stratton 104M02-0198-F1 Technical Specs
| Brand | Briggs & Stratton 725EXi Series™ |
| Full Model Code | 104M02-0198-F1 (Replaces 104M02) |
| Displacement | 163 cc |
| Engine Type | Vertical Shaft, Single Cylinder, OHV |
| Maximum Torque | 9.83 Nm (7.25 lbs-ft) Gross Torque |
| Maintenance | Check & Add™ (No Oil Change Required) |
| Start System | ReadyStart® (No Prime/No Choke) |
| Shaft Specification | 7/8" (22.2mm) x 3-5/32" Vertical Shaft |
| Air Filtration | Paper Cartridge Filter |
| Oil Capacity | 0.47 Liter (SAE 30) |
| Standard Warranty | 2 Years Consumer |
| Primary Application | Premium Walk-Behind Mowers |












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