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How to Replace Your Lawn Mower’s Engine

September 3, 2021 5:39 am

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Despite ‘No Mow May’, you probably have used your lawn mower quite frequently over the summer and if you’ve been using your lawn mower for a number of years, it could be suffering from wear and tear. The blades and the bottom of the lawn mower have to bear a lot of weight, and the engine can start to go faulty. It may be easier to simply buy a new lawn mower, but if the engine is the only problem, it can be more cost-effective to replace it yourself. I will help you by explaining the basic steps to swapping the engine yourself.

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  1. Identify which engine your lawn mower uses and purchase it. If you need Briggs and Stratton Parts, I recommend buying from https://www.briggsbits.co.uk.
  2. Once you have the new engine, and are ready to do the engine swap, turn your lawn mower onto its side to drain the oil without spilling by pulling out the drain plug or dipstick. Put it upright again when you have drained all of the fuel.
  3. The next step is to remove the blade of the lawn mower. This is dangerous so make sure to use work gloves, and whilst holding the blade, use a socket wrench to remove the centre screw. Use oil to help if the blades are stuck. Remove the blade collar and then the blade.

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  1. Next, disconnect all of the electrical wires and take off the self-propel drive cover.
  2. Lastly, unbolt the engine and take it out.  Clean any debris from underneath the deck, lubricate the cable linkages and inspect for fraying wires. Once this is done, you are ready to bolt the new engine to the deck and replace the self-propel drive cover.
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