Yes it's a Series II, and the fans are just on a simple toggle switch. I turn them on when I run the engine for a long period of time. I added the blower fans because I use it on my puller and found them to work great at keeping the engine cool. So i thought I would try it on the daily worker. It works great after mowing for over one hour my oil temp read 151. I'm happy with that. I got them here
http://www.attwoodmarine.com/store/product/Turbo-3000