issue swapping kohler inplace of tecumseh in 1816?

[1816case]

I bought a used Kohler 18hp (ch18s) to replace my oh160 (16hp) Tecumseh in my case 1816. I know others have done this BUT: How do I get the special triple groove (mechanical clutch inside) pulley to fit? The Tecumseh shaft the pulley came off is 1 3/16" but the shaft on the Kohler is 1 1/8" -that is 1/16" total difference so if I made a sleeve it would have to be only 1/32" thick? I can't seem to find a adapter sleeve to fit these sizes and that thin even work?

 

[ericf]

I have a Kohler Magnum 18 hp in mine. Runs great

 

[Hotrod1830]

The adapters are available. Google it, and you will find some. I havent checked, but if Kohler makes a CHXX engine with a 1 3/16 crankshaft, the cranks are interchangable and are not a lot of work to change. Thats what I did on my swap. Found a cheap used engine, then found a crank to make it work....

 

[Hotrod1830]

The adapters are available. Google it, and you will find some. I havent checked, but if Kohler makes a CHXX engine with a 1 3/16 crankshaft, the cranks are interchangable and are not a lot of work to change. Thats what I did on my swap. Found a cheap used engine, then found a crank to make it work....

http://www.ebay.com/itm/like/331496018926?lpid=82&chn=ps&ul_noapp=true