I have a 1999 4.3 Mercruiser that I have had for 5 years now. I have been extremely lucky with the engine and now things are starting to need more paying attention to. I have water leaking from the engine where the engine mount attaches to the boat and the motor. It is coming from underneath the mount where a bolt is located. Unable to determine the source with a mirror and a flashlight. Hoping the engine does not have to be removed to make a 100% location of the leak. Any suggestions?