2 weeks ago I took her out and she ran fine. While I was flushing I noticed steam coming from my exhaust. This boat is new to me. The previous owner said he had changed the water pump impeller a few months ago, but had to flush the system due to a failed impeller. My engine temps are fine, and water pressure gauge is reading 20 while on the hose in the video. I flushed for 10 min and did not see any changes in the amount of steam. This is a 496 Mag HO with Whipple. I haven't had any problems so far (knock on wood ). Just wanted to get some opinions on whether this looked normal. Thanks!

https://www.youtube.com/watch?v=iABQ...e_gdata_player

the amount of steam seems normal but 20 lbs on the hose does not seem right.

Sounds like you have a misfire if you listen real close...also check the trailer brakes,,the one port rear wheel looks like its covered in rust like the brakes are grinding..

I think what you hear is my exhaust flaps, they are pretty loud. I do have to check the trailer brakes because they prob haven't been changed since 2002! I am curious what the "norm" would be as far as pressure readings when on a hose though. My last boat would always be at 20 when I would flush it.

My water pressure at idle on a hose or in the lake is 1-3psi and it was the same on my previous boat. They are both raw water cooled though.

The steam does not look to be excessive and looks pretty normal.

I was going to say the same, sounds like there is a misfire.

What should I do to address that.....change plugs?

Yea new plugs and wires on a new boat is always a good idea.