Itinerant Air-Cooled

That's as open as it gets when cold, though it closes nicely when 12v is applied.

Can someone confirm it's supposed to open further?

I've looked at a couple of them in the past, a few off a vehicle and one new.....
Um,,,,To the best of my memory they didn't open all the way,,,,they opened very closely to what you have in the pic,,,or maybe a little bit more.....Sorry I couldn't be more certain,,,it was a few years ago.

Thanks Steve..

I suspect they're adjustable at the factory and that's why. I'm just troubleshooting some problems with cold idle.

Thanks!

I confirmed with several folks that's about right.

There is a nut on the housing that when loosened allows you to open or close it more. Where it is in the photo is full open.

I put it back in with al new hoses and it seems to work fine. My cold idle problem is gone now too. Harrumph.