[cmhsr]

I have twin Mercury 5.7lt gas engines in my Bayliner, I am told the engines have a problem with water getting in the engines, due to the exhaust design. Anyone have any information on this.Thanks

[msd58]

What model boat?

[cmhsr]

Originally posted by msd58: What model boat?

It's a 34.88 Motoryacht

[magster65]

Nice boat.Engines are mounted down low to get the center of gravity as low as possible but this can sometimes create a problem. Water may rush up the exhaust tubes when you slow down or when the boat is loaded up. Maybe you could benefit from a set of exhaust riser extensions... if this is what you mean by water getting in.

[cmhsr]

Originally posted by magster65: Nice boat.Engines are mounted down low to get the center of gravity as low as possible but this can sometimes create a problem. Water may rush up the exhaust tubes when you slow down or when the boat is loaded up. Maybe you could benefit from a set of exhaust riser extensions... if this is what you mean by water getting in.

[cmhsr]

They tried 6inch risers and still a problem, looks like a design flaw.

[magster65]

Maybe if it's just happening when you slow down... exhaust flaps might help?Third item down here. These might work as well...Your problem is not uncommon.

[SpinnerBait_Nut]

To the I/O forum.