Mountfield S421R HP roller mower
Mountfield S421R HP roller rotary


The S421R HP rear roller mower from Mountfield

Product: Mountfield S421R HP roller rotaryCategory: Petrol powered Lawn MowersAttributes: Mountfield , Collect Only , Stiga , Pull Start , Rear Roller Push , Small. Up to 43cm (17") , SteelTags:
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The Mountfield S421R HP hand propelled, rear roller rotary mower, is ideal for those lawns  requiring classic lawn stripes.

The robust steel chassis ensures this quality lawn mower will offer many years of reliable service.

Power is provided by an easy start 120cc Stiga ST120 OHV 4-stroke engine.

There is a choice of 5 heights of cut, ranging from 20mm to 70mm using a single lever, ensuring that you can pick the most suitable height for the finish required. The 55 litre collector is easily attached and has an indicator to show when it needs emptying.

A 41cm/16" cutting width makes this mower ideal for Smaller sized lawns up to 20m x 20m.

Engine BrandStiga
Engine TypeST 120 OHV
Engine Capacity123cc
Net Power Output1.9kW @ 2900rpm
Starting MethodRecoil
DriveHand Propelled
Cutting Width41cm /16"
Cutting Heights20-70mm (5 Positions)
Cutting Height AdjustmentSingle Lever
CollectorCanvas, Hard Top 55 litres
Fuel Tank Capacity0.8 litre
Lawn Size20m x 20m
Collapsible HandlesHand Wheel
Safety FeaturesOperator Presence Control
Included AccessoriesN/A
WheelsFront 180mm Rear Roller 127mm 
Warranty5 Years (Terms & Conditions Apply)
Washing LinkNo
dB Rating96

The engine of this machine requires SAE10w30 oil. The engine will be filled prior to delivery, but subsequent oil changes will require 0.6  litres of oil. We suggest that a first oil change is carried out at roughly 10 hours use, then on an annual basis.

We would also suggest that an annual service is carried out.

The engine is designed to run on standard unleaded fuel, but please be aware that this fuel will go stale very quickly so it is best to use fuel that is less than 60 days old or engine problems can occur.

We recommend the use of ASPEN 4 fuel as it will last indefinitely without going stale, so peak performance and starting is always guaranteed. ASPEN 4 is however more expensive than standard petrol and can be purchased in sealed 5 litre cans from ourselves at the Colaton Raleigh shop.

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