ezmobee
Supreme Mariner
- Joined
- Mar 26, 2007
- Messages
- 23,767
A tach is the most important gauge (besides fuel I suppose). It's needed to make sure you are propped correctly and not over-revving or lugging the motor. It also has the benefit of letting you know your charging system is working since it reads the stator pulses. Boat speedos kinda aren't worth it. They don't read accurately at slow speeds and you gotta deal with a pitot and all the associated tubing.