won't start after hitting log

[brush hog breaker]

I bought a new Billygoad Outback brushcutter. The first day using it, I hit a log and it stopped working. Blade is not damaged, but it won't start again. I hope I didn't do any serious damage to it. Any ideas?

[fixer67]

Flywheel key. The flywheel key is made to shear into when you hit something. If it did not shear the engine could be destroyed so NEVER use a steel key to replace a flywheel key. Most people thank that only push mowers shear flywheel keys but I have seen a lot of riding mowers shear flywheel keys as well.

[beaver]

if you hit something and it doesnt run try the flywheel key, they are ussually cheap and easy to put on if you have the right tools

[Jason Pallas]

Yep - flywheel key.