Strong Recoil Return

[PickerBenny]

recently traded a fishing rod for a 3.5 briggs classic push mower. I was planning to switch the engine (which ran great on the deck it was on) to a husquvarna deck. I then did that, put on the mower blade, and then when i start it, the recoil rips out of my hand. I took the air filter off so there is no oil clogging, and the blade is on the engine. Didn't check the keyway, but it sat all winter without running, so i doubt the keyway would shear just sitting there. Any ideas? I posted a vid of it running. If you watch the video, it also revs low and high at first, then it stops doing that and runs better, whats causing that?

 

[Rivets]

Before you check for a sheared key, check for a loose blade.

 

[PickerBenny]

Before you check for a sheared key, check for a loose blade.

Blade is as tight as it can be, not loose at all. When i first tried to start it, it sputtered normally then just quit, it didnt have a pull start issue. Now im skeptical, it might be a blade. going to check tommorow!:laughing::laughing::laughing: