Briggs and Stratton 18hp ic clutch set up?

[Lantz]

So I picked up a B&S 18hp ic and I am planning on putting it in my Attex and I have a couple questions about the clutch set up. First off I have a Comet 40 series clutch but I'm not sure if this is a big enough clutch for the application it's rated for 18hp but I'm not convinced. And what color spring should I run in the driven clutch?

[thebuggyman1]

The 40 series is a Go-Kart clutch. I don't think you will be happy with it if you CAN get it to work with your secondary. It is meant for a very skinny belt 7/8" I believe, and it is smaller diameter also. Buy a 780 series 302405A-W2 - 780 Series Drive Clutch for Recreatives Ind Max ATVs | ATV Parts | MFG Supply
For the secondary, a yellow, green, or red spring will work. I like the green ones, especially for a 18 hp in a light machine like an Attex. Yellow is the weakest, and red is the strongest. Red would be more appropriate for a heavier machine with lower hp.

[Lantz]

Thanks, will I need to get the driven clutch for the 780? I'm working with an Attex Colt and I'm not sure what size belt the driven clutch takes.

[Uncle Vin]

Yes. Get the drive and driven. Search the site for belt sizes pay particular attention to the belt width, as it's very important