Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A easy install

Installed the unit in my sailboat; it was easy to install and works great. I initially thought it was defective because at time it would read erratic. After a couple of weeks I realized it only read erratic when the motor was running and was fine when under sail power only.I believe the problem is due to the built-in charging unit of the outboard; I'll know shortly.