171cc Petrol Lawn Mower

This Vonhaus 171cc petrol lawn mower is one of the best because it combines a powerful petrol engine with a self-propelled drive, making mowing easy without sacrificing performance.

Its large 51cm cutting width and eight height settings offer the perfect balance of efficiency, control, and customisation for large-sized gardens.

And that’s not all – thanks to its petrol-powered engine, it’s not limited to UK lawns and can be used almost anywhere in the world without needing specific power supplies or charging.

It features a robust 171cc petrol engine, delivering consistent performance with a maximum no-load speed of 2,850RPM.

Yes, it is self propelled, meaning the mower drives itself forward while you guide it, reducing physical effort and making mowing more comfortable.

The mower has a 51cm cutting width, offering a good balance between efficient coverage and easy manoeuvring in tighter spaces.

Yes, there are eight cutting height options ranging from 25mm to 70mm, allowing you to tailor your lawn for different seasons and preferences.

The grass collector has a huge 60L grass capacity, which reduces the need for frequent emptying and keeps your lawn tidy as you mow.

Yes, the self propelled drive and easy handling make it well suited for uneven or sloped areas.

This lawn mower requires an initial fill of approx 0.4L of standard grade engine oil (SAE30 or 15W-40). The engine oil level can be checked using the dipstick provided to ensure it is between the min/max levels. For petrol, the lawn mower requires 0.85L of unleaded petrol (minimum 95 octane).

It includes a two-stage safety system to prevent accidental starts, ensuring safer and more controlled operation.

Not at all, this is a petrol lawn mower, so there are no cables or batteries. Simply fuel up and start mowing.

Here are some concise tips for storing a petrol lawn mower safely and effectively:

• Empty the fuel tank or add a fuel stabiliser to prevent stale petrol from damaging the engine.

• Change the oil if it’s been a long season to prevent sludge buildup whilst in storage.

• Clean the mower thoroughly, removing grass clippings and debris from blades and under the deck.

• Remove or sharpen the blades before storage to prevent corrosion and maintain cutting performance.

• Store in a dry, sheltered area to protect it from rain, frost, and damp conditions.

The best time to mow grass is mid-morning or early evening, when the grass is dry but not stressed by strong midday sun. This helps prevent damage to the lawn and gives a cleaner, healthier cut.

Avoid mowing early in the morning when grass is wet with dew, or late at night when it may not recover properly.

To maintain a clean, healthy lawn, sharpen the blades regularly and replace them if they become bent or excessively worn — typically every 1–3 years, depending on usage and cutting performance.

At Vonhaus, we recommend the following for optimal grass cutting results:

• Mow when the grass is dry – this gives a cleaner cut and prevents clogging.

• Avoid cutting more than one-third of the grass height at a time to keep the lawn healthy.

• Keep mower blades sharp for a neat finish and to prevent tearing the grass.

• Change your mowing pattern regularly to avoid compacting the soil and creating ruts.

• Don’t mow in extreme heat or drought, as this can stress and damage the lawn.

• Leave grass slightly longer in summer to help retain moisture.

• Remove debris before mowing to protect your blades and improve safety.

• Empty the grass box regularly to maintain airflow and cutting performance.

• Mow little and often during peak growing seasons for best results.

• Clean your mower after use to extend its lifespan and keep it performing well.

Yes, it comes with a standard free 2-year warranty that is applied automatically upon purchase.