This Spear & Jackson, 4-stroke grass trimmer uses an easy-start system so you can get to work quickly, with minimal effort. The advantages of a 4 stroke machine are that they reduce vibration, noise and fumes, plus you dont need to mix petrol with oil before you use it - just add unleaded petrol. It also makes it more comfortable for you to use for longer. The auto choke function means the trimmer will start easily no matter how hot or cold the engine is. The powerful grass trimmer easily cuts through long grass and undergrowth and with an extra wide, 43cm cutting width its perfect for cutting larger areas quickly. The shoulder strap and handle add comfort and stability so you can use the trimmer for longer. You will need to supply unleaded petrol and engine oil (60ml of SAE30 engine oil) before start up. For extra peace of mind Spear & Jackson offer a 3-year guarantee on all Garden Power products. Model number: S3143PT. Features: 31cc engine. Cutting width 43cm. Bump feed - requires you to tap the head on the ground to release more line. Dual line feed - ideal for overgrown areas. Soft grip . Safety guard . Anti vibration system - minimises vibrations allowing you to work more efficiently. General information: Weight 4.95kg. Manufacturers 3 year guarantee.