Our verdict
The smart-money budget choice if you want stripes without paying Hayter or Honda money. Briggs engines are easy to service. Performs above its price.
Pros & cons
Pros
- Rear roller for stripes at budget price
- Briggs & Stratton engine — well known
- 60L grass box is generous
- Self-propelled with key start option
Cons
- Cobra dealer network is thin
- Plastic wheels and deck feel cheaper
- Roller bearings degrade quicker than premium brands
Full specs
| Type | Petrol |
|---|---|
| Cut width | 46 cm |
| Engine / Power | B&S 500E Series 140cc |
| Weight | 30 kg |
| Deck | Steel |
| Self-propelled | Yes |
| Rear roller | Yes (stripes) |
| Mulching | Yes |
| Cutting heights | 6 positions |
| Bag capacity | 60 L |
| Suited to lawn | Medium |
| Noise level | 95 dB |
Buying second-hand
£140–220 is the used range — anything under £150 is excellent if it runs cleanly. Check the rear roller for play — a worn bearing is £20 to replace yourself. Briggs engines are easy to spot-service: change oil and air filter and most issues vanish. Avoid if rust on the deck looks structural rather than surface.
Where to buy the Cobra MX46SPB
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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 46cm blade
Annual sharpening is free; replace when bent or cracked.
|
£24–£32 | £8–£12 |
|
Air filter (foam)
|
£12 | £4 |
|
Spark plug (NGK BPR4ES)
|
£8 | £3 |
|
Primer bulb
|
£6 | £3 |
|
Drive cable replacement
Stretches at 5–8 years. 30-minute DIY fit.
|
£18–£28 | £8 |
|
Rear-roller bearing kit (pair)
Replace if you hear clicking; affects stripe quality.
|
£24 | £12 |
Fair-offer calculator
Tell us about a specific used listing for the Cobra MX46SPB 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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