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Common Lawnmower Faults - and How to Fix Them

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Mower Not Starting (Electric):

  • Thermal cut-out activated (if fitted) - reset or wait a few minutes for automatic reset to occur.
  • No power - check plug fuse, wiring and mains supply for faults.
  • Blades jammed - free blades and clean area.
  • Motor assembly faulty - replace faulty motor assembly or contact a qualified repairer.
  • Faulty on/off switch - replace faulty on/off switch or contact a qualified repairer.

Engine Not Starting (Petrol):

  • No fuel - check the fuel level. Also, open the fuel tank and look for dirt in the fuel. Drain the tank if fuel is dirty - consult your manual for specific instructions.
  • Fuel valve turned off -make sure the valve is in the correct position.
  • Blocked carburettor - contact a qualified repairer.
  • No spark - contact a qualified repairer.

Grass Not Being Cut:

  • Height adjustment too high - adjust cutting height.
  • Blades blunt - sharpen or replace blades.
  • Grass too wet - wait until the grass is dry.
  • Grass too long - use a strimmer to get the grass down to a manageable length.
  • Underside clogged up with grass - clean the underside of the mower.

Uneven Cutting:

  • Blunt, twisted or unbalanced blade - check, sharpen and/or rebalance the blade.
  • Dried clippings and dirt under mower - clean your lawnmower.

Motor Cutting Out After Short Time:

  • Thermal cut-out activated (if fitted) - reset or wait a few minutes for automatic reset to occur.
  • Motor overheating - clear blocked vents and clean mower.
  • Cooling fan is broken - check and replace the fan.
  • Blades clogged up with grass - clean the blade area.

Black Smoke From Exhaust:

  • Air filter blocked - check and clean filter if necessary.
  • Fuel mixture screw needs adjustment - check the mixture setting and adjust if necessary.
  • Oil overflow - check oil levels.
  • Worn piston rings - contact a qualified repairer.

Engine Idles Badly:

  • Fuel mixture incorrectly set - check the mixture setting and adjust if necessary.
  • Blocked air filter - check and clean filter if necessary.

Mower Not Hovering (Electric):

When starting your Flymo hover mower, it should be tilted slightly to allow the air to circulate under the deck, giving it lift. Not doing this could make the machine feel heavy during use.

If your lawn feels 'spongy' underfoot, this is as a result of a build up of thatch and moss. This causes the machine to be sucked down onto the lawn and prevents it from hovering. This can be remedied by scarifying the lawn. Working in one direction, then at right angles after the initial sweep, use a spring-tined over the lawn, digging into the top level of soil.

Also, if there is a build up of grass cuttings underneath the hood, or in between the fins on the impeller, then this will prevent the machine from hovering. This can be resolved by cleaning the vents and motor.

Poor Flotation (Electric):

If your hover mower is not floating properly, try the following steps:

  1. Disconnect the lawnmower from the mains electricity supply.
  2. Clean the underside of the hood and the fan blades.
  3. Raise to a higher height of cut.
  4. If poor flotation persists, contact a qualified engineer.

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