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Series 1000 cub cadet. Hit a tree stump and motor stopped and will not start. Keyway is intact. Piston moves when engine is turned over bottom pulley moves normally. Any suggestions?

will it fire if you spray starting fluid into the carburetor?
post the model info of the tractor and engine.
tractor info is under the seat, should have a Kohler engine, so the Model and Spec number will be on a sticker on the engine.

Now this might sound stupid but we need the actual model number from the serial number tag?

Normally riders do not do engine damage when hitting stump with the blades but there can other damage done depending on how hard of hit the mower took. Might even damage one of the safety switches/

PTO disengaged?

Flywheel key.

Intact doesn't mean anything other than someone see's it there. Have you removed the key and inspected it with good vision? I need readers so that is where proper vision deal comes in. Is the flywheel rotated even just a smidge where it doesn't belong?

We've all helped several guys that claim the same deal. Key is mint. Come to find out the key was hurt and the flywheel was off.

Old timers meaning wise men would walk the property prior to mowing as to not have these issues. Doesn't cost anything either. Might even lose a pound or so??

Csta11 said:

Series 1000 cub cadet. Hit a tree stump and motor stopped and will not start. Keyway is intact. Piston moves when engine is turned over bottom pulley moves normally. Any suggestions?

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Did you take the fly wheel Off ? I had one the the key looked great from the top but was gone underneath.

v4n5b1 said:

Did you take the fly wheel Off ? I had one the the key looked great from the top but was gone underneath.

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Say it again.....

I agree about the flywheel key. I've removed them and thought they were perfect, no marks but on reinstall they were not. If I had an question, due to sudden stops, etc. I always replaced the key. It's cheap and saves time in the long run.

v4n5b1 said:

Did you take the fly wheel Off ? I had one the the key looked great from the top but was gone underneath.

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My thoughts also flywheel must be pulled.

Assuming you mean that the starter turns the engine but it doesn't fire, check all the settings to be sure you didn't accidentally bump a switch or lever. Then as others have said, pull the flywheel and inspect the key. If that isn't it check with some gas in the carb throat to see if it runs. The impact could have dislodged some debris in the fuel tank. Start with the flywheel.

It takes 3 things for an ICE to run

Air and Fuel in the right appx ratio
Spark at the right time
Compression

One of them is missing. Your job is to figure out which.

Another way to check the flywheel/key.

Pull plug and pull off the engine shroud so you can see the flywheel and coil. Turn over the engine the correct direction and position the flywheel magnet just after the coil pickup. That is the time that the coils primary is collapsed and the secondary will create the "spark". The piston should be at/near top dead center. If not then timing is off and you prolly have a sheared key.

What part of the tractor hit the stump?