11 · Lawn & Garden

Garden Tiller

Also called Rotavator · Rototiller · Cultivator

Rotating blades that break up and turn over soil, for preparing beds, lawns and vegetable plots.

Petrol engine

Overview

A tiller turns compacted ground into a loose, workable bed using rotating blades called tines.

It is used to prepare ground for planting or turf, to work compost and fertiliser through the soil, and to break up ground that has been walked on or parked on.

Soil condition matters. Slightly moist soil tills beautifully; bone dry soil turns to dust and sodden soil packs into clods.

Work in passes at increasing depth rather than trying to reach full depth in one go.

Best uses

Preparing vegetable beds and planting areas
Breaking up compacted soil before turf
Working compost or fertiliser into the ground

Not suited for

Stony or root-filled ground
Sodden soil, which packs rather than breaks up
Working over buried irrigation lines

Troubleshooting

Find a symptom

It hops across the surface instead of digging in

Checks to try, in order

Ground is too hard or too dry — soak it and come back.
Lower the depth bar so the machine has something to drag against.
Check the tines are fitted the right way round; reversed tines will not pull in.

Reference draft — always follow the manufacturer’s manual.

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The tines clog with soil and grass

Checks to try, in order

Stop the engine before clearing anything.
Soil is too wet. Let it dry out for a day.
Clear long grass and weeds off the plot before tilling.

Reference draft — always follow the manufacturer’s manual.

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Engine won't startShared · Petrol engine

Likely causes

Fuel valve or switch off
Stale fuel
Low oil sensor
Choke position
Spark plug cap loose

Checks to try, in order

Turn the fuel valve ON and the engine switch to ON.
Cold engine: close the choke. Warm engine: leave the choke open.
Check there is fresh petrol in the tank — stale or water-contaminated fuel is the most common cause.
Check the engine oil. Many engines have a low-oil shutdown that stops them starting when oil is low or the machine is on a slope — top up and set the machine on level ground.
Make sure the spark plug cap is pushed fully onto the plug.
Pull the starter rope with a smooth, firm pull — don't let it snap back.

If the starter rope is locked or unusually hard to pull, stop — don't force it. Tag the unit and return it to the workshop.

Reference draft — always follow the manufacturer’s manual.

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Starts, then stalls or runs roughShared · Petrol engine

Likely causes

Choke left on
Blocked air filter
Low fuel
Low-oil shutdown

Checks to try, in order

Open the choke gradually once the engine has warmed up.
Check the fuel level and that the fuel cap vent isn't blocked.
Check the air filter — a dusty filter chokes the engine. Tap it out or swap it.
Check the oil level again; the low-oil sensor can cut the engine on uneven ground.

Reference draft — always follow the manufacturer’s manual.

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Smell of fuel or a visible leakShared · Petrol engine

Checks to try, in order

Switch the engine off immediately and move away any ignition sources.
Turn the fuel valve OFF.
Check the fuel cap is seated and look for a wet fuel line or carburettor bowl.

Don't run a machine that is leaking fuel. Tag it out and report it.

Reference draft — always follow the manufacturer’s manual.

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Safety

Stop the engine and wait for the tines to stop before touching them.
Boots, not trainers. The tines pull the machine forward quickly when they bite.
Check for buried irrigation, cables and pipework before starting.

For petrol engine

Refuel only with the engine off and cool. No smoking or open flames nearby.
Exhaust contains carbon monoxide — never run it indoors, in trenches or in enclosed spaces without ventilation.
Wear hearing protection, safety glasses and safety boots.