The time has come to replace the exhaust
hose in the boat. Since it's a huge project
it invites me to wonder if the system can be improved.
The system is less than ideal. The engine
is almost in the middle of the boat and the exhaust
hose has a long run aft. Along the way it goes through a Volvo
There's no riser at the water
injection point and the muffler
is only at best a foot below the water
injection. The slope of that section of hose isn't steep either so there's not much to discourage water from coming back up the hose.
I suspect this system may have been Ok with the original engine
which probably had some extra height from the manifold down to the muffler. But now with the MD2030
it seems as if it wouldn't take much to have water slosh up into the manifold.
So I'm considering two possibilities. The one I will do if the parts
will fit the other is intended as plan B.
If possible I'd like to put on a riser an then carve out some space below it for a water lift
. Then I'd run the hose towards the transom and perhaps put in one of those Vetus gooseneck mufflers or maybe just a loop of hose.
But this system might not fit and I'd still like to do something to prevent water from sloshing up into the manifold in rough weather
. Obviously that hasn't happened yet but it seems a wonder that it hasn't.
So my plan B is to stick with the in-line muffler but to add a check valve before that so water in the muffler and hose can't get back to the manifold.
I know you guys are the experts and I've read what I can but I have to ask directly what people's opinions are about the exhaust check valve. Anyone have experience with them?
I would think if they are that great then everyone would have one. There must be a down side but then the downside of ruining the engine is a big one and I sail and motor
in some pretty rough weather
so it seems prudent to address this ahead of time.
Thanks in advance, and of course there's nothing like the resource that is cruisersforum.com. I really should contribute to help give back but don't do much of that sort of thing these days. Sure glad others do though. My expertise? Not really sure; I know lot about a little and a little about a lot.