Our verdict
Identical engineering to the Countax B65 from the same AriensCo UK factory. Westwood badging traditionally appears at slightly lower prices. A genuine British-built tractor for serious lawns.
Pros & cons
Pros
- British-built — serviceable for decades
- PGC powered grass collector — handles wet
- 107cm deck and rear collect
- Same factory as Countax
Cons
- Heavy at 305kg
- Niche — slower resale
- New price serious
Full specs
| Type | Ride-on |
|---|---|
| Cut width | 107 cm |
| Engine / Power | B&S Vanguard 14HP |
| Weight | 305 kg |
| Deck | Steel |
| Self-propelled | Yes |
| Rear roller | No |
| Mulching | No |
| Cutting heights | 6 positions |
| Bag capacity | 320 L |
| Suited to lawn | Large |
| Noise level | 100 dB |
Buying second-hand
£1800–3500 used. Engine hours under 600 is good. PGC blower belt slipping is the most common collection fault — £40 replacement, dealer fitting recommended. Westwood/Countax service history is interchangeable; both add £300 to fair value.
Where to buy the Westwood S150HE
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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 107cm blade
Annual sharpening is free; replace when bent or cracked.
|
£24–£32 | £8–£12 |
|
Oil filter (commercial grade)
|
£14 | £7 |
|
Air filter + pre-cleaner
|
£32 | £16 |
|
Spark plugs (pair)
|
£15 | £8 |
|
Deck spindle bearing
Replace if blade vibrates or the deck whines under load.
|
£48 each | £22 each |
|
Transaxle service (gear oil change)
Hydrostatic units need fresh fluid every 200 hours.
|
£60 dealer | £15 DIY |
|
12V starter battery
Generic 12V 18Ah lawn-tractor battery — fits most ride-ons.
|
£45 | £28 |
Fair-offer calculator
Tell us about a specific used listing for the Westwood S150HE 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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