I have twin 2003 Mercury 135 HP OPTIs, with approximately 1200 hours on each engine. Recently the port engine will intermittently and briefly rev high and drop back to normal when I go into neutral after slow forward operation. Sometimes an alarm will sound briefly. I have not done anything to...
How did you resolve the issue with the cooling water leaking from behind the lower engine mount? I have the exact same problem on my port 135 Opti and I wanted to see how this was repaired.
