will the hatch work/

rasbury

So, pulled my exhaust apart...don't know much about risers and manifolds....but mine do not look good. I have heard talk of wet ones, dry ones...how do I know what I have and what is the difference?. One of my flaps is toast...

randy56

There is no way you can get that engine out with out unhooking the lift, and raising the hatch 90 degrees,  sorry. It's not that hard I do it by my self. It is a little harder coming down and reattaching by your self but I do it. so you can. 

rasbury

Randy- not a problem, I put it at 90 anytime I'm in there...i was just wondering how to work the hatch with the batteries out...

reneechris14

@rasbury let me tell you about a wet joint and a dry joint. A wet joint is what you have the exiting water goes though the manifold up though the riser and out over board. A dry joint the manifold has antifreeze in it. The exiting water goes out though the riser and over board. The gasket is solid between the riser and manifold. A dry joint.

zaverin1

And fap could be either Old over heat or just tear and wear

rasbury

So from what I read on line, from 04 forward everything met made is a dry joint? If a wet joint has antifreeze, it still has water circulating through the heads/manifold? I pulled my elbows, broke loose the riser and it was not pretty. I did not take a good look at the elbow, but assume it is just a tube? So how does the exhaust and water get separated when they exit the boat?

reneechris14

Wet joint is just sea water. The exhaust and water mix at the end off the riser,then exit together. If your looking to buy manifolds, look at changing to a full closed system. For you it's just thermostat housing and some hoses. Your heat exchanger is big enough.

rasbury

so....I was in a pretty quick hurry when I pulled the riser apart as I'm trying to get the motor out Friday ( now looks like Monday) but when I pulled the riser apart it looked like the rear hole for water was plugged- I was thinking crud but the more I thought about it, it seemed pretty solid like intentional....is that possible on a closed cooling?? Interesting thought on the full closed system...I will see if I can find something to look at but if it is that simple, why does Merc bother with a 1/2 closed or whatever it would be called? I'd love it to be a fully closed system and then the raw water only cools the heat exchanger correct? How do I tell if what I have is not already fully closed cooling??

reneechris14

Full closed would be block heads and manifolds 
1/2 is just block and heads.
Look at the post in the engine bay thread you will see the hoses.

reneechris14

Some of those gaskets are only open on the sides not the front and back. I guess to slow down the water folw?

rasbury

I will look at this more once I have the motor out, get some pictures etc. so you all can see what I have.....anyone want to buy a boat cheap? JK- I will get this figured out...hopefully the motor is ok and no damage has been done.

zaverin1

I’ll say motor is fine and flap was a over heat or just fell apart from age.
what you are seeing is effects of salt water on the exhaust system.
reason why saltire love fresh water boats.