Briggs starter issues grind and locking

[Auto Doc's]

The ring gear on this design does not wear the teeth like some designs do.

Basically, you are trying to replace broken parts with worn out parts and it is just not working.

The starter in the picture has everything that moves simply worn out.

Trying to get by using salvage/used parts will send a person in circles like this.

"It can't be the starter.... it was just replaced".

Every time a single cylinder engine stops it will tend to stop in the same spot in relation to the upcoming compression stroke of the cylinder as rotation stops. The more cylinders an engine has, the less likely it is to stop in the same place every time.

 

[sgkent]

let's try again. The stater gear is pushed up to engage when it spins. Then it drops back to disengage. Unless you took the photo of the starter with a high speed camera, the starter gear is in the engaged position, and the gear is covered in corrosion. It the starter does not disengage, it will spin and spin with the engine until it kills the flywheel and starter. Being polite, that starter is junk. The shaft or gear is worn out too because there is also too much play in it. It needs to go into the junk metal bin. If you put a good starter on it, it may work. Since the original gear was plastic, it is probably not what wore the flywheel teeth, it is the metal gear that probably spun and spun because it did not disengage. Do not use that starter again, on any engine.