DescriptionThis video provides step-by-step instructions for replacing the flywheel on Briggs and Stratton small engines, commonly found in Toro, Lawn Boy, John Deere, and Craftsman lawn mowers, riding tractors, zero-turn radius mowers, wheeled edgers, pressure washers, and generators. The most common reason for replacing the flywheel is if the engine won’t turn.
All of the information in this flywheel replacement video is applicable to the following brands: Briggs & Stratton, Toro, Lawn Boy, John Deere, Craftsman
Tools used: Phillips head screwdriver, 5/16” socket or nut driver, 3/8” socket or nut driver, 15/16” socket, flywheel puller
Step-By-Step Instructions1
Before you replace the flywheel on your engine first make sure the engine has cooled.
2
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
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We recommend performing this procedure with little or no fuel in the tank.
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Use a phillips-head screwdriver to unthread the mounting screws securing the engine cover.
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Next, release the starter rope from the retainer.
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Now use a 5/16th inch socket or nut driver to remove the screws securing the fuel tank.
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Use a 3/8th inch socket to remove the mounting bolt securing the tank to the side of the engine block.
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Remove the 3/8th inch bolts securing the blower housing.
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Pull off the blower housing and oil dipstick tube.
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Use a 13/16th inch deep-well socket or a spark plug wrench to help loosen the spark plug then unthread it.
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Confirm that the piston is in the “down” position then insert a cord into the cylinder to prevent the piston from moving.
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Now use a 15/16th inch socket to loosen the flywheel mounting nut.
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Unthread the nut and remove the starter cup.
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Now depress the bail arm to release the brake and use a spring clamp to hold it in place.
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Confirm that the magnets in the flywheel are rotated away from the ignition coil.
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You can now use a flywheel puller to help lift off the old flywheel.
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Before you install the new flywheel remove the flywheel key from the crankshaft if still intact.
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Now position the new flywheel on the crankshaft so the slots align.
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Insert the flywheel key into the slots and push it into place.
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Align the starter cup and rethread the mounting nut.
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Torque the mounting nut to 55 foot pounds.
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Remove the clamp to release the bail arm.
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Remove the cord from the cylinder.
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Rethread the spark plug.
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Be careful not to strip the threads by over tightening.
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Replace the blower housing making sure the attached dipstick tube is inserted into the sump.
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Thread the mounting bolts to secure and torque them to seven-and-a-half foot pounds.
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Confirm that the spacer is in place on the fuel tank then reposition the tank on the blower housing.
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Replace the bolt and mounting screws to secure.
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Realign the engine cover.
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Rethread and tighten the mounting screws.
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Depress the bail arm, extend the starter rope and secure it in the retainer.
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With the repair completed reattach the wire and boot to the spark plug refill the fuel tank and your engine should be ready for use.