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How do I change flywheel key

How do I change flywheel key ? I have a toro flywheel walkbehind recycler. I think I sheared off the flywheel key how do I locate and change it

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Remove the nut that holds the flywheel on.right hand threads.once the nut and starter hub is off the keyway will be can tell if it is broken then.if it isn't put the hub and nut back on.....problem somewhere else.if it is broken...take a small hammer and tap the flywheel on the oppisit side of the keyway.usually only takes a couple of hits from the hammer.once the flywheel is off the key comes right out of the crank shaft......replace the key,reinstall the flywheel.(some times you have to hold the brake off so the flywheel will slip all the way on shaft) install hub and nut.hope this helped,let me know........................

Posted on Jun 26, 2009


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Toro Recycler GTS2 that tries to turn over on reverse when I pull the starter cord. WHat is the problem?

Possible sheared flywheel key or

Valves badly out adjustment causing the decompression system not to work or the decompressor itself has failed.

Mar 22, 2015 | Toro Garden

1 Answer

Toro recycler wont start after hitting rock

flywheel key sheared but before you make this repair... disconnect the spark plug wire, turn the mower on it's side with the muffler pointing down and spin the blade by hand while keying in on one spot to verify the crankshaft isn't bent... removing the spark plug makes this task safer and easier... did you remove the flywheel nut ??? reinstall it so it's even with the top of the crankshaft. put a prybar under the flywheel and hit the nut with a large mallet... DO NOT USE A STEEL HAMMER OR YOU RISK RUINING EVERYTHING... you can actually use a steel hammer but you have to be very careful... that's just a disclaimer :-)

Aug 29, 2014 | Toro Garden

1 Answer

Mower hit a rock and won't start

On most push mowers, there is a "key" that is located on the end of the crankshaft, opposite end of the blade, that drives the flywheel. It's a small rectangle piece of metal that connects the two. When the inertia of the blade stops abruptly, the flywheel acts as a safety for the engine, and shears the key. Tools are made to remove the flywheel and videos online for repair assistance. Replacement keys are specific to the engine you are working on. Hope this helps!

Jul 24, 2014 | Toro Super Recycler Super Bagger Lawn...

2 Answers

Does the blade need to be on for my 6.5hp self propelled toro mower to start? It keeps backfiring and the blade key is striped.

I am not familiar with this model. However, just about all lawn mower engines rely on the blade to act as a flywheel, a very important factor in engine operation.

I hope this helps you ...

Thanks for your interest in

Jul 13, 2011 | Toro Garden

1 Answer

Toro recycler model number SR-21 S lawn mower wont start changed plug, filter, new gas. Mower ran for two lawn cuttings but seemed to overheat and choke out frequintly in high grass now it wont start at...

check your oil is it up to full, then I would check to see if you have compresson, pull your plug and roll over and feel with finger ,but don't touch spark plug wire or you will light up! next I would check for spark, then for fuel, make sure the carb is getting fuel,,,check your hoses and fuel cap and clean your carb and needle/seat and make sure gas will run through the fuel line. Also you could have sheared a flywheel key

the choke out you are talking about could of been a lean condition and smoked the eng rings
Good Luck compresson test should tell all 2StrokeJim

May 17, 2011 | Toro Lawn Mower With Toro Power Tools

1 Answer

Stopped abruptly won't restart

tThe flywheel is indexed to the crankshaft with a soft aluminum "shear" key, when the blade is stopped suddenly the key is broken instead of the crankshaft. The flywheel will need to be removed and a new key installed. Make sure to clean the shaft and flywheel mating surfaces so they fit tightly or the new key won't last too long.

May 27, 2010 | Toro Lawn Mower With Toro Power Tools

2 Answers

Mower wont start

You will need to replace an aluminum "key" in the flywheel. Whenever you hit something, the key is designed to shear so you don't break something major.

Sep 02, 2009 | Toro Lawn Mower With Toro Power Tools

2 Answers

Toro mower does not strat

Did you possibly hit something? Sounds like the flywheel key may have sheared.

May 18, 2009 | Toro Lawn Mower With Toro Power Tools

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