Small Engines (Lawn Mowers, etc.): Electric Clutch for a Vanguard Engine, crankshaft diameter, electric clutches

Question
A couple of years ago we replaced the engine on a
724-Z Wheel Horse with a 18 hp Vanguard Engine model number 350447, type 0076.  I don't recall if the electric clutch came off the old motor or
not, but it was a Warner 5210-31 and never did fit quite right even though we made it work.  Now
that it's shot, I was wondering how to find out exactly which replacement clutches will mount to our engine.  I've looked all over the web, but I'm not having a lot of luck.

Answer
Toro acutally owns Wheel Horse...a Toro dealer may have some info.

As popular as the electric clutches are there is still a mysterious cloak around the details.

I know we can get a couple of aftermarket clutches but not too sure on the specs...I will have to check but it will be a week before I return to the shop.

Rotary, Stens and Silver Streak are large aftermarket suppliers and I know Rotary sell some clutches.  
Can you send me your crankshaft diameter size and the pulley size on the electric clutch.

Eric