Ok I have a 06 Merc 4 Stroke 115, It only has maybe 170 hours on it. My problem is that this weekend, When I was running it, every time I would trim my motor, or move my jack plate up or down, I would loose 100-200 RPMS. My volt meter would show 13.6 then I would hit one of the switches, and the volt meter would read like 11.6. The batteries are brand new. If anyone has a simple explanation. I would be happy to hear it. This is the first four stroke, I have ever had, but I have to believe that this is not normal. Also I ned some suggestions on where to have a cover made for my boat. Either in NW Houston, or DFW area.