1 1/8 shaft

[big kid]

I have a kohler k series 12 hp motor that has a 1 1/8th shaft, I have been searching all over for a clutch to fit it and just thought maby a golf cart clutch ? Any thoughts on this ,think it will hold up ? this motor is heavy and all cast iron the cart is a carter. I'm thinking of rebuilding the rear and motor mounts to fit this hog in there ???????????????

 

[Doc Sprocket]

Sounds kinda tricky- Is that a straight 1 1/8", or tapered? What was the engine's original drive system, and what are the odds of you being able to lay hands on it?
Short of that, I'd say you're either looking at some machining, or maybe a jackshaft. You could have the 1 1/8" shaft turned down to 1" and use a Comet 40 series or similar, or perhaps run a pulley or sprocket off of that to a jackshaft that will take a standard 1" clutch. I don't think you want to go 3/4" with 12hp.

 

[theo]

You might have to go to a Comet 94C, check ebay.

 

[big kid]

Straight shaft and it was on an old wheel horse tractor this thing is a monster e start, We had it running on saturday hit the gas it flipped off the test bench almost got me did not hurt the motor hit the grass and cut off started right back up

 

[r97]

if you got the cash and you can find one get a comet 44series tc

 

[redsox985]

Or rip out the shaft and lathe if you really want to.

Not recommended. Just a last ditch effort.

 

[fowler]

could u rig a jack shaft to the touque converter
or just run a tensioner clutch

 

[redsox985]

I think the jackshaft idea will be the winner. Rig up a 1:1 ratio from the motor to a jackshaft and then put a 40/44 series TC setup on the jackshaft. Except I would use chain from the motor to the jackshaft because that's a lot of power.

 

[Blazkowiez]

http://www.mfgsupply.com/m/c/209706A.html
If its straight shaft this should in theory work though you'll need to purchase a driven clutch as well.

 

[fowler]

thats quite cheap

 

[redsox985]

I doubt the exists in the stockroom. It's a Comet. I'd still take a shot.

 

[Doc Sprocket]

If you can lay hands on one, that's great. If not, you need to consider some of the above (and other) options.

And machining the shaft to 1" is a perfectly viable option, assuming it's done by a competent machinist. I would never recommend trying this yourself.