What is a Flywheel? The flywheel on a Briggs & Stratton small engine was originally developed to maintain constant angular velocity of the crankshaft. Finally, if a lawn mower or tiller blade hits a rock or curb, the flywheel key can sometimes absorb the damage, reducing repair costs significantly.Beside this, how do I know if my flywheel key is bad?
SYMPTOMS. The symptoms of a sheared flywheel key range widely from a barely noticeable misfire to a no-start condition. In between these extremes the engine may misfire noticeably, run rough, backfire, be difficult to restart hot, or lack power. Advanced timing can cause engine overheating.
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Moreover, what is the purpose of a flywheel key?
The flywheel key is a rectangular metal peg that keeps the crankshaft and flywheel aligned when you tighten the flywheel nut. If the mower blade hits an object with enough force to knock the flywheel out of alignment, the flywheel key breaks, protecting expensive parts such as the crankshaft from damage.
What causes a flywheel key to shear?
? The key is shearing because you're asking it to hold the flywheel in place while running. The key should only be for locating the flywheel correctly before bolting it on. The fly wheel should be held on to the crank by pressing it onto the snout of the crank.
How do you install a flywheel?
Clean the surface of the crankshaft flange using carburetor cleaner and a shop towel. Insert the flywheel back onto the crankshaft while having at least one mounting bolt ready to install. Once installed check the alignment of the remaining bolts because the flywheel can only be mounted one way.How do you remove a flywheel from an engine?
The flywheel is held in place by retaining bolts, which you can find in its center. Remove these with a wrench, and then carefully remove the flywheel from the crankshaft by pulling it away. Put the replacement flywheel in its place and replace the retaining bolts, tightening them firmly.What is a flywheel brake?
Flywheel Brakes. Flywheel brakes are used to stop the flywheel from turning when a clutch has been disengaged and the motor is shutdown. Typically, these brake systems are installed on stamping, forging and metalforming equipment. Flywheel brakes are required for presses due to safety regulations.How do I remove a stuck flywheel key?
Remove the Woodruff key. On the freed pulley, locate the semicircular shape in the shaft. This is the key and it can be removed by gripping the sides with pliers or wedging one end with a screwdriver. The key may be stuck.Which way does a lawn mower engine spin?
The engine should turn clockwise.How do you test a flywheel magnet?
Mark the magnets on the flywheel by labeling them in the position they sit with a small piece of masking tape on the flywheel. You can test the magnets for position by using another small ceramic magnet. If the magnet is repelled, label the flywheel magnet R, and if it is attracted, label the flywheel magnet A. 
