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Petrol Powered Cylinder Lawn Mowers Follow

If you are petrol cylinder mower owner, new or established, you may well have queries and questions so we thought we would gather a collection of tips and advice, including answers to the types of questions new cylinder petrol lawn mower users often ask, to help you save time and be ready.

That way you can get the best from your mower and use it efficiently, and with complete confidence every time you go out to mow.

Regular checks of everything, from spark plugs to controls, air filters and even nuts and bolts will help avoid any major disasters.   

Assembly: Your new mower will arrive ‘boxed' and there is a minimal element of assembly. This is usually limited to attaching the 'Handlebars' and 'Grass catcher' .

Fuel: Your new lawnmower has a 4-Stroke engine, so Oil and Petrol are put in separate compartments, no mixing required.


  • Modern fuel contains ethanol, which absorbs moisture and causes the fuel to deteriorate in as little as 30 days, causing damage and starting issues if left in the tank. Our suggested solution is either drain the tank if are going to leave it for a while or always add fuel stabilising additive to all fuel before filling up your tank.
  • For the same reasons you should only put 'Fresh Unleaded Petrol' in your tank. Old fuel will degrade quickly if it has not already done so.


  • It is important not to under-fill or over-fill your machine. Please refer to your manufacturers guidelines as to the quantity.
  • Regular oil changes protect your engine from damage and excessive wear. Do refer to your ‘Engine’ manual regarding schedules for regular oil changes.
  • Not all models come with oil in the box and none with oil in the tank. It is advisable to check and have some ready just in case. The type should be 10/30 Lawnmower Grade Oil, otherwise known as SAE 30.
  • Oil needs to be changed after the first 5 hours of use. Running in of the machine can cause minute particles of metal debris in the engine, which an oil change and flush removes safely.

Starting: If you are have difficulty starting your machine, it is always advisable to check the following:

  • Ensure you are holding in the 'OPC Bar' (Operator Presence Control). If you are not holding this in you will be unable to pull out the recoil.
  • If you have a 'Fuel Switch', please ensure this is on.
  • If there is a 'Primer', check you have primed the machine.
  • If there is a 'Throttle', check that this is fully on to start the machine and then reduce the throttle once the machine has started
  • If there is any blockage of the main carburettor jet, you engine won't start so this is worth checking. 

Throttle: Again, if there is a throttle on your model, do remember that it does not affect the speed of the machine, it simply reduces or increases the 'Revs' of the engine.

Storage: Petrol Lawnmower engines are not waterproof. So make sure you store yours in a dry place, covered if possible.

Rollers: A regular check-up on the state of your front/and/or rear roller is important.

  • Look for wear on the shaft and the bearings as wear can affect the cut, especially. 
  • Check that the rollers are spinning freely. If not, look for grass or other debris clogging up the shaft or lubricate the roller if it has grease nipples. If it does not and you cannot identify the cause of the stiffness, try to strip the roller to lubricate it or contact your local dealer to do this for you. 

Grass and Mud: Wet and rotting grass causes metal components to rust and grass and dirt in or around the engine can cause overheating and damage. It can also affect your roller and you blades.

  • Always make sure you clean the cutting deck regularly and thoroughly.
  • You will need to tip the machine to clear the deck from beneath. Use a hose, and then a brush, soap and hot water.

NB: Be careful when tipping as you can cause the oil to flood the air filter. This can contaminate your spark plug and carburettor. Always switch your mower off and, preferably, disconnect the spark plug before you go near the deck or blades. 

Servicing: Don’t forget that Annual Servicing is recommended by the manufacturers and is a requirement if you want to extend the guarantee beyond the first year. Out of tune engines and blunt blades can result in poor cutting, poor collection, and environmental pollution. This best done before you over-winter your mower. 

And finally, we sincerely hope that these guidelines will help you, and that you enjoy your cylinder mower. If you do have any issues or questions not covered by this letter, please contact us on customercare@mowdirect.co.uk.


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