Briggs & Stratton 5210 EX Vertical Shaft Petrol Engine - 21HP, 540cc

The Briggs & Stratton 5210 EX is a vertical-shaft petrol engine widely used as a replacement engine for mowers, generators and other vertical-shaft equipment. It is suitable for homeowners, repairers and equipment dealers who need a genuine Briggs & Stratton engine matched to the correct shaft dimensions for their machine.

• Application: Suitable as a replacement engine for lawnmowers, generators and vertical-shaft equipment.
• Key specification: 21HP, 540cc displacement.
• Shaft: Vertical shaft, 25.4 x 80mm (width x length).
• Brand: Genuine Briggs & Stratton engine with documented part number.

Key Features

• Genuine Briggs & Stratton engine: Manufactured to the brand's standard specifications, supporting reliable long-term parts and service availability.
• Vertical shaft, 25.4 x 80mm: Designed to match equipment using this exact shaft size — confirm against your existing engine before ordering.
• Electric start: Convenient key-start operation (battery not included).

Typical Applications

• Replacement engine for domestic and commercial push/ride-on mowers
• Generators and pump sets
• General vertical-shaft equipment

Technical Specifications

What's Included

• 1 x Briggs & Stratton 5210 EX petrol engine

Please note: Installation fittings, electrical protection, cartridges, control boxes, cables, unions, brackets, or accessories are not included unless specifically listed above.

Installation & Compatibility Notes

Measure your existing engine's shaft diameter and length and compare against the 25.4 x 80mm shaft on this engine before ordering — mounting bolt pattern and rotation direction should also be checked, as these were not specified by the supplier. Fuel and oil are not included; the engine ships without oil. Qualified installation is recommended for equipment with electrical components.

Warranty & Support

This product is supplied with the applicable manufacturer or supplier warranty, subject to correct installation, correct application, and warranty terms.

Zisabo supplies quality plumbing, pump, filtration and electrical products with practical support to help customers choose the correct item for their application. If you are unsure whether this product is suitable, contact us before ordering and our team will assist where possible.

Need help choosing? If you are unsure whether this product is suitable for your system, contact Zisabo with your application details, required flow, pressure, pipe size, voltage, installation depth or water source, and we will assist where possible.