Concrete Saw: Engine Rotates but Blade Doesn't
If the engine in your concrete saw is rotating, but the blade is not, check the belt, clutch and clutch drum. This is a common symptom that you can fix on your own with the help of our troubleshooting guide. This is meant to be a general guide for your DIY repair. For more detailed information on your specific model, please refer to your owner's manual.
The following procedure is going to vary slightly on all models. To prevent accidental start up, begin by removing the spark plug wire and the spark plug. Depending on your model, take out the starter, or clutch cover, and remove the belt cover. Release the tension on the belt by turning the tension nut counter clockwise until it stops. Walk the belt off the clutch pulley by turning the clutch drum. Rotate the fly wheel to get the piston to the bottom, dead center. Stick a small screwdriver down the spark plug hole to feel...
The following procedure is going to vary slightly on all models. To prevent accidental start up, begin by removing the spark plug wire and the spark plug. Depending on your model, take out the starter, or clutch cover, and remove the belt cover. Release the tension on the belt by turning the tension nut counter clockwise until it stops. Walk the belt off the clutch pulley by turning the clutch drum. Rotate the fly wheel to get the piston to the bottom, dead center. Stick a small screwdriver down the spark plug hole to feel for the piston at the bottom. Insert a rope, or cord, in the spark plug hole to ensure the piston stays in the downwards position. Clear any clips on the crankshaft, in front of the clutch.
Using a clutch removal tool, take out the old clutch. Some clutches have an arrow that indicates the direction of removal, which is normally clockwise. Take out the old clutch and pull out the clutch drum. Clean the crankshaft and install the new clutch drum and ring spacer. When installing the shoes part, ensure it is put in correctly. It should say “top” on the side facing outwards.
Now, using the clutch removal tool, tighten the new clutch in position. Take out the cord, or rope, from the cylinder. Reinstall the belt by walking it back on the pulley and reapply the tension on the belt by turning the tension nut clockwise until it stops. Reinstall the belt cover and the starter or clutch cover.