Often asked: What Type Of Key Recommended For Lawn Tractor Flywheel?

What is a small engine’s flywheel?

Flywheels are the heart of the electrical system on small engines, with magnets mounted on the outside surface required for ignition. If a lawn mower or tiller blade collides with a rock or curb, the flywheel key can absorb the damage.

How do I remove the flywheel key?

Install a self-tapping flywheel puller or use a 1/4 X 20 tap to tap the holes. Never strike the flywheel; even a slightly damaged flywheel is a safety hazard and must be replaced.

How do I check and inspect the flywheel key for replacement? Inspecting Flywheel and Keyway

Make sure the tapered sections are clean and smooth, with no play between them, and replace it if there are any signs of shearing or if you have any doubts about its condition.

What size is a Briggs and Stratton flywheel key?

Q: What are the dimensions of the flywheel key? A: The keys are rectangular in shape and are made of aluminum. They measure 1/8 X 3/16 X 5/8.

Can you make a flywheel key?

Re: homemade flywheel key? yes, they are hardened and you should get a factory one, plus, if the one you make has any slop, the flywheel will slide and shear it off. spend the money and get a new one.

What is a flywheel key on a riding lawn mower?

When you tighten the flywheel nut, the flywheel key is a small rectangular piece of metal that keeps the crankshaft and flywheel aligned.

What is the purpose of the flywheel key?

A FLYWHEEL KEY is a small metal part (see Photo 1) that locates the flywheel in the proper position in relation to the crankshaft, and thus to the piston.

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What does flywheel key do?

A soft key allows the flywheel to move on the crankshaft when your mower blade hits a tree root, an old stump, a large dried clod of dirt, etc. The flywheel key shears to protect the crankshaft from twisting, which would result in a very expensive repair.

Should I turn my flywheel by hand?

Once the heads and spark plugs are in, you’ll have compression; simply removing the spark plugs will make it much easier to turn over by hand; as long as there’s no binding, you’ll be fine.

What causes kickback on a lawn mower?

When you pull start your mower and the pull cord snaps from your grip, the lawnmower engine kicks back because the blade has collided with something solid, causing the engine to come to a halt and breaking the flywheel key.

What causes a sheared flywheel key?

The key is shearing because you’re asking it to hold the flywheel in place while it’s running; the key should only be used to correctly locate the flywheel before bolting it on; the flywheel should be held on to the crank by pressing it against the snout of the crank.

How tight should a flywheel be?

The torque on the flywheel bolt should be 43 foot pounds.

How do I keep my flywheel from turning?

Place a pry bar, pipe, or other metal between the bolt head and the ground, then turn the flywheel in the engine’s direction of rotation until it makes contact with your prop, then torque away!

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