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Need help, 1997 Sundance with the 7.4 mercruiser engines. 454 big block. Have an exhaust leak. I first tried that metal patch, but filling in the worn area but still having exhaust leak. Thinking of changing out the cylinder head. First I was told that I just need to match up the six digit...

Have a 1997 Sundacer with the 7.4 mercuries. Fuel injection, V drive. Starboardengine gets up to 3000 RPM, at WOT. Thebounce back and forth between 2800 and3000. Pulled the fuel/ water filter, had some water and junk. Replaced, same issue. Switch tank and ran off the port tank,. Portengine ran...

Have a 1997 Sundacer with the 7.4 mercuries. Fuel injection, V drive. Starboard engine gets up to 3000 RPM, at WOT. The bounce back and forth between 2800 and 3000. Pulled the fuel/ water filter, had some water and junk. Replaced, same issue. Switch tank and ran off the port tank,. Port...

I notice the port engine is putting out a lot of steam. The exhaust water is very hot. Is this a sign of the risers being blocked or the fresh water cooler