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Mountfield S421 R PD Petrol Lawn Mower - Self-Propelled

Mountfield S421 R PD Petrol Lawn Mower - Self-Propelled

This Mountfield S421R PD petrol lawn mower is self-propelled and features a full-width rear roller...

Best current price£359.00from Just Lawnmowers

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Mountfield S421R PD Self-Propelled Rear Roller Petrol Lawn Mower

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4 offers from £359.00 - £999.99

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Just LawnmowersMountfield S421R PD Self-Propelled Rear Roller Petrol Lawn Mower
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£359.00
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B&QB&Q - S421Rpd Petrol Lawnmower Self-Propelled Rear Roller 41Cm
Free delivery in 1–3 days
£399.00
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OnBuy.comMountfield S421 R Pd Roller Mower Petrol Lawn Mower
Free delivery in 1–3 days
£399.00
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eBayMountfield S421R PD Self Propelled Rear Roller 139cc Petrol Lawn Mower 41cm Cut
Free delivery in 1–3 days
£999.99
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Product Information

Full details

This guide is for homeowners seeking a self-propelled lawn mower that delivers a professional finish. The Mountfield S421 R PD provides a striped lawn appearance and efficient grass collection. However, it's best suited for medium-sized lawns and requires regular maintenance for optimal performance.

All features

Model Part NumberS421 R PD
BrandMountfield

Extended Product Information

FAQs

How often should I change the oil?

Consult the owner's manual, but generally, oil changes are recommended after the first 5 hours of use and then annually or every 25-50 hours of operation, depending on usage.

What type of fuel should I use?

Use fresh unleaded petrol.

How do I sharpen the blade?

You can use a file to sharpen the blade, or take it to a professional lawnmower repair shop.

How do I store the mower for the winter?

Drain the fuel, clean the mower, and store it in a dry, covered area. Disconnect the spark plug cable for safety.

What is the warranty period?

The Mountfield S421 R PD comes with a 5-year warranty.

How do I clean the grass collector?

Rinse the grass collector with water and allow it to dry completely after each use. Remove any stuck-on grass clippings.

How do I adjust the cutting height?

There is a lever on the mower deck to adjust the cutting height.

Troubleshooting

Engine won't start.

Check the fuel tank for fuel. Check the oil level. Ensure the spark plug is connected and in good condition. Try a new spark plug. Check the autochoke is engaged. Pull the cord firmly.

Mower cuts unevenly.

Check the blade for damage or dullness and sharpen or replace it. Ensure the cutting deck is level. Adjust the cutting height evenly on all wheels.

Grass collector is not filling properly.

Ensure the discharge chute is not blocked. Reduce the mowing speed in thick grass. Empty the collector before it becomes too full.

Mower is hard to push (self-propelled not working).

Check the drive belt for damage or wear. Inspect the wheels for obstructions. Consult the owner's manual for drive system maintenance.

Pros and Cons

Pros

  • Creates a professional, striped lawn finish.
  • Self-propelled design reduces physical effort.
  • Large grass collector minimizes interruptions.
  • Durable steel cutter deck for longevity.
  • Easy to use with the Autochoke engine.

Cons

  • Requires regular maintenance (oil changes, blade sharpening).
  • May be too large for very small lawns.
  • Steel deck can be susceptible to rust if not properly cared for.
  • Requires petrol, adding to running costs.

Setup, Compatibility & Care

  1. Assembly: Unpack the mower and attach the handle using the provided screws. Ensure all parts are securely fastened.
  2. Oil and Fuel: Before first use, add oil to the engine (consult the owner's manual for the correct type and amount). Fill the fuel tank with fresh unleaded petrol.
  3. Cutting Height Adjustment: Adjust the cutting height using the lever on the mower deck. Choose a height suitable for your grass type and desired finish.
  4. Starting the Engine: Engage the autochoke, pull the starter cord, and the engine should start. Allow the engine to warm up before engaging the blade.
  5. Cleaning: After each use, clean the underside of the deck to remove grass clippings. This prevents the buildup of debris and helps maintain the blade's performance.
  6. Storage: When storing the mower, drain the fuel tank to prevent fuel degradation and potential starting issues. Store the mower in a dry, covered area.

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