HELP PARTS - Crankshaft, rod and piston assemblies

[Delkc01 1]

Can anyone help me location where I maybe able to purchase a crankshaft, rod and piston assemblies for a K181S Kohler 8hp engine I need to rebuilt?

[953 nut 70,226]

The Spec number,  30108D  is the most important information when looking for a crankshaft. We have a couple of venders here that you should start with.

K&B Horse Parts  @76c12091520h may have some NOS parts for the engine.

A to Z  https://a-ztractor.com/ will have used parts and may have NOS too. He sells on eBay but if you don't see what you are looking for give him a call.

[ri702bill 13,300]

You WILL need to know the bore size before ordering a piston & a set of rings... Standard bore, .010 over, etc.

If you plan to have the cylinder bored oversize, the Machine Shop needs those parts BEFORE they start... let THEM measure the bore to determine the correct size....

[gwest_ca-(File Mod) 12,529]

Here is an original parts list if you need it

 

[squonk 48,306]

I have a crank. It may or may not need turning. You would need to get it checked. PM me if interested. 

 

[Fordiesel69 274]

If you need to, the k181 can go. 020 under.  Often a machine shop can turn yours and then re fit the rod.  So if your only needs to goto 11 or 16 thou they can custom bore your rod. 

 

I have 3 cranks.  All need turned WAY MORE. 

[oliver2-44 11,808]

Before you buy parts, have you taken the block and crank to a show that machines small engines.

Buying a used rank in good usable condition is probable a challenge.

A shop may be able to grind you crank for less that buying one.

 

[Delkc01 1]

WOW....Thank you all very much for your replies and help here.  Sounds like the best option to start with is grinding down my crank, so I am going to start there and fingers crossed this repair my overall issue.  

 

I will keep you all updated, and THANK YOU all again for your help here.