What is acceptable compression in a 1998 7.4l Mercruiser MPI? At what level of compression are you clear of the possibility of head gasket issue or cracked cylinder head or block? I would like to diagnose and cure but will cut my losses and replace if it looks fatal.
History-Engine...
I have been pouring over forums looking for an answer tath I want to hear.
Background-
1998 Mercruiser 7.4L MPI w/Bravo III drive. 740hrs. Purchased this year.
2 weeks ago engine ran up to 180 deg while underway. When I backed doen on throttle at the ramp, the temp went higher and alarm...
