Limited-Time
Vice Admiral
- Joined
- Mar 30, 2005
- Messages
- 5,820
I want to install an hour meter on my 5.7 merc. but I only want to register when the engine is actually running, not the whole time the key is on. Thought about tying into the oil pressure switch but its the wrong circuit. Can I tie into the output side of the alt. or does that cycle on and off? Any other ideas?