What is a good website or book to learn about the different choices in inboard jets and what one to choose from? I have been searching the net a lot and found very little on why one would choose one over the other aside from the Alaska Mining and diving website.

What routine maintenance needs to be done yearly/ monthly?

How to tell if one has been rebuilt or needs to be rebuilt?

What performance upgrades can be made(stainless impellers, etc)?

What not to do?

I have checked out Riverjet magazine and the forums and learned a bit form there. Still looking through it.