How to Adjust the Clutch on a Lawn Mower Engine

A ride-on lawn mower is a great appliance that can be used to effortlessly cut the grass from your lawn.

However, the mower motor must run efficiently for easy mowing. 

The mower engines have a PTO clutch that eliminates the requirement for a second transmission to drive the mower blades. 

When you adjust the clutch correctly, it also reduces fuel consumption and improves mower performance. Ideally, the clutch change should be checked after every 200 hours of mower use.

This allows safe and efficient use of the mower. So if you want to adjust the clutch on your mower engine, here’s how you can do it.


Step 1 – Preparing the engine

To get started, put on your protective gear, and then park the mower on a flat surface to make it easy to work.

 Apply the emergency brake before removing the key. Now open the engine and remove the spark plug wires to ensure maximum safety.

Step 2 – Locating the clutch

Bring your mower manual to locate the clutch. Usually, this clutch is attached to the bottom of the engine and is shaped like a small bell. 

From this position, you control the mower blades. You will also be able to identify the clutch by following the mower blades. 

Someone usually rout these through the clutch and following them makes the clutch immediately apparent. 

After locating the clutch, it will be easy to locate the change slots.

 These are long, thin openings in the brake plate. They are rectangular and are sandwiched between the rotor and the armature.

Step 3 – Make adjustments

Insert feeler gauge into change slots. This will allow you to check the distance between the rotor faces and the armature. 

They usually have standard distances and you can get an idea of ​​the adjustments required for the grooves.

 Insert the caliper into the first slot, and using a screwdriver, tighten the nut. 

Make adjustments until there is no gap between the rotor faces and the armature.

 It is important to ensure that you do not tighten the bolts to where the faces touch the caliper. 

With the other two slots, repeat the same settings. Make sure there are equal adjustments in all slots or the clutch will not adjust correctly.

Step 4: finish and test

After you have made adjustments to all the slots, reconnect the spark plug wires. Now activate the switch so that the blades spin at full speed. 

After the blades are fully in motion, turn off the clutch switch and observe the blades.

 If the blades do not come to a complete stop within 5 seconds, the adjustments are not complete. Make the adjustments again.

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