JGarver574
New Member
- May 4, 2020
- 7
- Boat Info
- 1990 Sea Ray Sundancer 270
- Engines
- Single 454 Mercruiser
I have an intermittent knock going on with my 7.4L Mercruiser Bravo engine. It only happens at idle, and when I move the throttle up at idle it speeds up with the RPMs, then goes away. Sometimes at idle, it will go away and come back. Engine temp, level, and oil pressure are fine. Boat starts up right away with no issue. To me it sounds like it’s coming from the port side exhaust housing that comes off the block.
Video link to YouTube -
Video link to YouTube -