A-B125T2370045F1-AI ENGINE, COMPLETE, HORIZONTAL SHAFT

One New Aftermarket Replacement Complete Engine, Horizontal Shaft Fits Briggs & Fits Stratton Equipment

This is a complete horizontal shaft replacement engine Fits Briggs & Fits Stratton (B&S) powered outdoor power equipment. Horizontal shaft engines are commonly used in pressure washers, tillers, log splitters, water pumps, and portable generators. This engine features an overhead valve (OHV) design for cooler operation and longer valve life, a Dura-Bore cast iron cylinder sleeve for extended service life, and a Dual Clean air filtration system. Electric start with recoil backup is included, along with a 9-amp charging system, low-oil sensor, and fuel tank.

Specifications

• Engine Type: 4-Stroke OHV Single Cylinder
• Displacement: 420cc (2100 Series)
• Gross Torque: 21 ft-lbs
• Max RPM: 3600
• Crankshaft Type: Straight, Horizontal
• Crankshaft Diameter: 1 in.
• Crankshaft Length: 3-31/64 in.
• Crankshaft Keyway: 1/4 in.
• Crankshaft Rotation (from PTO): Counter-Clockwise
• Ignition: Magnetron Electronic (maintenance-free)
• Starter: Electric with recoil backup
• Charging System: 9 amp
• Includes: Fuel tank, low-oil sensor, muffler

Compatible Equipment

This Fits Briggs & Fits Stratton 2100 Series horizontal shaft engine is designed for use in pressure washers, tillers, log splitters, water pumps, and portable generators requiring a 420cc horizontal shaft engine. Verify crankshaft dimensions and mounting pattern before ordering.

Replaces Part Number(s):

125T237-0045-F1, A-B125T2370045F1-AI

Aftermarket Interchange Numbers

25T237-0045-F1 (closely related Fits Briggs & Fits Stratton 2100 Series 420cc horizontal shaft engine - verify exact model before ordering)

New aftermarket replacement part - not remanufactured, not used.