AS 21 4T B&S Allmäher Long Grass Petrol Mower

AS 21 4T B&S is the entry point into the Allmäher range, giving you AS-Motor build quality in the simplest and lightest petrol package. Its Briggs & Stratton 4-stroke engine provides enough pull to cut grass up to 60 cm, and the 3-wheel layout makes the mower easy to steer around orchard trees, posts and uneven areas.

This model suits buyers who want dependable long-grass performance without the cost or weight of the higher-spec machines. The front wheel can be locked for better control on gentle slopes, and the removable guide bar lets you fold the mower down small enough to travel in most estate cars. Suffolk Mowers supplies the AS 21 4T B&S with clear setup support and a 2-year AS-Motor warranty.

What AS 21 4T B&S Is Built For

AS 21 4T B&S is aimed at users who want a straightforward petrol Allmäher for seasonal long-grass control. Light weight and simple controls make it easy to handle on level ground and mild slopes, while the 51 cm deck gives enough width to cover ground quickly without becoming awkward in tight spaces. Orchard strips, rougher garden sections and paddock edges are the areas where this model earns its keep.

Cutting Performance

Strong torque from the B&S 850E engine keeps the blade moving through grass up to 60 cm. Friction discs and a third crankshaft bearing protect the engine if you strike stones or hidden debris, cutting down on repair risk. Cutting height adjusts between 55–80 mm, ideal for controlling longer growth without stressing the machine.

Manoeuvrability and Handling

Quick direction changes are the main strength of the 3-wheel design. The front caster wheel spins freely around obstacles and can be locked diagonally when working across gentle slopes. Rear-wheel drive gives steady forward pull without adding bulk, and the 41 kg weight keeps the mower responsive even on uneven patches.

Position in the AS-Motor Range

• Lighter and more affordable than the AS 21 Comfort – fewer extras but easier to transport and store.
• More straightforward than the AS 26 – designed for moderate terrain rather than steep banking.
• A clear step up from consumer rough-cut mowers – stronger build, better protection and more reliable power.

Practical Ownership

A removable guide bar makes the machine compact enough for transport in an estate car, which is a major advantage for gardeners and smallholders moving between sites. Basic maintenance is minimal thanks to the proven B&S engine, and the simple single-speed drive system keeps operation predictable and fuss-free.

Useful Accessories

• Rear wheel brake – helps on angled ground.
• Hand guards – useful around brambles and thorny growth.
• Tilt meter – gives a quick read on slope angles.
• Special blade – better suited to sandy or abrasive soil.

Who This Model Suits

Ideal for buyers who want reliable long-grass capability without stepping into heavier Allmäher machines. Fits the needs of orchard owners, gardeners maintaining large rural plots, holiday-home caretakers and anyone who needs a practical tool for rougher grass that doesn’t involve lifting a heavy cutter or dealing with 2-stroke fuel. Users moving up from consumer-grade mowers will notice an immediate improvement in durability and cutting confidence.

Support From Suffolk Mowers

Suffolk Mowers supplies the AS 21 4T B&S with clear setup guidance, blade checks and advice on getting the best results in long grass. Accessories such as hand guards, tilt meters and special blades are kept in stock, and we can recommend the right setup based on your ground conditions.

Every AS-Motor machine we sell includes a 2-year warranty. Any issue that appears during normal use is handled directly through our workshop, keeping downtime to a minimum. Seasonal servicing, blade replacement and maintenance checks are also available to keep the AS 21 4T B&S working reliably year after year.

Technical Specifications

Frequently Asked Questions About AS 21 4T B&S