Crankshaft Counterweight Wear

[rmaynard 16,594]

My grandson Mason is starting a refresh of his Raider 12 engine. It is a K301. After removing the pan he discovered this on the bottom of the counterweights.

 

 

The wear looks to me like someone's feeble attempt at balancing.

Any other ideas?

 

[ebinmaine 74,659]

Believe it or not that's probably original to the Kohler factory.

I have a 16 horse that looks just like that.

I posted a picture of it here. I showed those pictures to my own small engine guy that rebuilds quite a lot of engines.

 

Nobody had a problem with it.

Edited 3 hours ago by ebinmaine
Correct autocorrect

[rmaynard 16,594]

12 minutes ago, ebinmaine said:

Believe it or not that's probably original to the Kohler factory.

I have a 16 horse that looks just like that.

I posted a picture of it here. I showed those pictures to my own small engine guy that rebuilds quite a lot of engines.

 

Nobody had a problem with it.

Thanks Eric

[squonk 44,669]

Yes they didn't get carried away on making it pretty

[pfrederi 18,987]

K-181crank just back from the machine shop  .010 under..... Never paid attention before to the scuff marks...

 

 

[Achto 29,932]

Now that I look closer at the pics, I wonder if those grinder marks are from the foundry? Note that they are right on the casting seam. Might even be where the sprue and riser were cut off. If that's the case, the guy running the grinder at the foundry didn't care much what they looked like, as long as they passed inspection so that he could make his piece rate.

 

Edited 11 minutes ago by Achto