Finn Lassen wrote:

Had the same thought. However, when measured, the solenoid on my new starter pulls more than 10 Amps!
So I left my 30Amp RadioShack relay in place. My starter switch is only rated for 5 amps (at 120 VAC).

Be careful, Finn.  A switch rated for AC will take much less DC current.  The reason being that electrons don't actually move all that much in AC.  They just sorta shuffle back and forth, never actually getting anywhere much.

'Course, you may very well know this, and if your setup works that is all the proof you need.  But it took me some time before I discovered why that 30A AC switch was cheap and small, while the 5A DC switch was big and expensive.