I'm a newbie to this forum, and a newbie to boat maintenance
. My name is Rick and I work for a scuba diving
operator in Thailand
who has just purchased a hand-built Phinisi Schooner to use for diving
. Our mechanic
had a change of life-plan recently and decided to quit to become a yoga instructor.
Which leaves us without a good mechanic
and me, a relatively inexperienced boat guy, to figure things out.
Our boat is a 23m long Phinisi Schooner with 7 cabins capable of holding 12 customers and 3 dive staff. The wheel
house is midships and 5 cabins are fore of this area, and 2 are aft. The 2 aft cabins are right at the back of the boat. The engine
is also midships, directly below the wheelhouse. The exhaust
from the main engine
(Mitsubishi 6D16 6-cyl diesel) vents on the port side above the waterline. The problem is that the aft port cabin
gets all the fumes from the engine. I've searched the forums
here and found it's due to the design of the boat and the 'station wagon effect'. What I need to know is how to get rid of it.
The engine is new as of 3 months ago and its tuned up and running exactly as it should (not too rich/lean).
I have 2 ideas and would like to see what people think.
1) If I ran the exhaust
downward after it exited the boat, so that it exited below the water
line, would that filter the exhaust at all? Does this put added strain on the engine?
2) The engine uses a pre-cooler which means that the exhaust pipe not only has fumes coming out, but a significant amount of water
too. This means I can not run a smokestack style exhaust up high, UNLESS I do so but make a smaller exit for the water going down, and a bigger pipe for the fumes, going up. Do you think this would work, or would all the fumes go out the bottom anyway?
Is there any sort of device that can be put on the exhaust to cut down on the fumes? Some sort of muffler
Thanks in advance for any advice.
Khao Lak, Thailand