Our verdict
A solid mid-budget cordless from a brand best known for robotic mowers. The 5Ah battery handles a typical 600-700m² UK back garden. Yard Force's 40V system is decent if not class-leading; comparable Greenworks 40V offers a wider tool range.
Pros & cons
Pros
- Yard Force 40V battery shared with full garden range
- 5Ah battery does ~600m² per charge
- Brushless motor
- Mulch plug included
Cons
- Yard Force less known than EGO or Greenworks
- No self-propulsion at this price
- Plastic deck
- Battery replacement £80 only direct from Yard Force
Full specs
| Type | Cordless |
|---|---|
| Cut width | 42 cm |
| Engine / Power | Yard Force 40V brushless |
| Weight | 18 kg |
| Deck | Plastic |
| Self-propelled | No |
| Rear roller | No |
| Mulching | Yes |
| Cutting heights | 6 positions |
| Bag capacity | 50 L |
| Suited to lawn | Medium |
| Noise level | 75 dB |
Buying second-hand
Used £110-180. The battery is the make-or-break — anything under 4 minutes hold-charge is dead, anything over 40 minutes runtime is healthy. Yard Force batteries are model-specific (no cross-brand swaps), so a knackered battery means a £80 commitment to replace.
Where to buy the Yard Force LM C42A
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Repair-cost reference
UK 2026 ballpark prices for the parts you're most likely to need on this mower. OEM is dealer-genuine; aftermarket is what you'll find on eBay or generic small-engine suppliers. Use these to sense-check any quote and to negotiate on used buys.
| Part / job | OEM | Aftermarket |
|---|---|---|
|
Replacement 42cm blade
Annual sharpening is free; replace when bent or cracked.
|
£24–£32 | £8–£12 |
|
Replacement battery
Wear part — typical 3–5 years to 80% capacity. The biggest single repair cost on any battery mower.
|
£90–£180 | £55–£120 |
Fair-offer calculator
Tell us about a specific used listing for the Yard Force LM C42A you're looking at. We'll compute a fair offer range from our used-market data and the condition signals you provide.
Calculations are guidance, not gospel. Used-market prices vary by region (Scotland is typically 10–15% cheaper than the South-East), season (October cheapest, March most expensive), and seller motivation.
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