I have a Ryobi electric lawnmower, and I want to get the blade sharpened for the first time. I have a 15mm ratchet wrench, just like the instructions say, and I'm immobilizing the blade with a brick.
But no matter how hard I turn, the bolt just doesn't budge at all. I called Ryobi support, and they said the only other thing to try was spraying the bolt with WD-40. I assume the bolt is so tight because it hasn't been touched since being assembled at the factory.
I did that, let the WD-40 sit for a half hour, and tried again. The bolt still won't budge at all. What are my other options? I don't own an impact wrench.