• Cobra Fortis 20B petrol cylinder lawnmower
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Cobra Fortis 20B

Cobra Fortis 20B

£1,399.00
£1,499.00 £1,399.00
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Taxes included. Shipping calculated at checkout.
  • ✓Powered by Briggs & Stratton XR550 engine
  • ✓51cm / 20" cutting width for larger lawns
  • ✓Self-propelled, 4.2 km/h at 2800 rpm
  • ✓6-blade cutting cylinder for clean, precise results
  • ✓Cutting height adjustable from 6-30mm
  • ✓3-30mm with optional 10-blade cartridge (sold separately)
  • ✓Interchangeable cassette system
  • ✓Steel front roller & cast ribbed split rear roller for perfect stripes
  • ✓Large 75L grass box for fewer stops
  • ✓2-year domestic warranty
✓ 2 years warranty✓ 30-day returns✓ UK support

Ships direct from Cobra (not from Mowd), typically 2–5 business days. Delivery £9.95.

Good to know
  • ✓Best for larger lawns & fine striping
  • ✓Engine: Briggs & Stratton XR550
  • ✓2 years warranty
View full details

The Cobra Fortis 20B is a 20" self-propelled petrol cylinder mower powered by a Briggs & Stratton XR550 engine. Designed for larger lawns, it delivers a fine, low cut and defined stripes thanks to its 6-blade cylinder, split rear roller and interchangeable cassette system.

Specifications

Cutting width
51 cm
Cutting height
6–30mm (3–30mm with optional 10-blade cylinder)
Type
Cylinder
Drive
Self-propelled
Power
Petrol
Engine
Briggs & Stratton XR550
Grass box
75 L
Weight
89 kg
Warranty
2 years

Why buy from Mowd?

Genuine Cobra machines

Supplied as official Cobra products with full manufacturer warranty and support.

Built to last

Professional-grade build quality designed for years of reliable mowing.

Ships direct from Cobra

Dispatched straight from Cobra, typically within 2-5 business days.

Expert UK support

Plain-English advice and UK-based help, with warranty service handled by Cobra.

Ready to upgrade your mow?

Self-propelled, rear-roller stripes, built to last.

Frequently asked questions

How does the warranty work?
Your mower comes with the manufacturer's warranty. Warranty claims and repairs are handled directly by Cobra Support, and you'll need to register your machine with Cobra to activate cover - see the documentation supplied with the mower for details.
How is my mower delivered?
Mowers ship directly from Cobra (not from Mowd), typically within 2-5 business days. Delivery is £9.95.
Can I return it?
Yes - you have 30 days to return an unused mower, plus your statutory 14-day right to cancel. Get in touch and we'll arrange it.

What lawn owners say

4.6/5 on Trustpilot · 62 reviews · read our reviews →