livingsoulnation
19.05.2021 4:03:35
1989 Correct Craft Martinique B/R PCM 5.8 Power Plus Package more
See full version: Thread: Wet Exhaust Hose replacement procedure
1989 Correct Craft Martinique B/R PCM 5.8 Power Plus Package more
The hollow muffler gives a completely different sound! A very nice one! With just straight hose it has a whap whap whap of an older boat sound to it. With the hollow muffler, has a deep loud tone, not really valve train noise like straight pipe. I would do a vid of what mine sounds like but cant with a bent prop shafthere
1992 Supra Comp Ts6m 5000 Series PCM 5.8 HO Pro Boss Protec Ignition (not converted) w/ 4010 "Fish Bowl" Carb
1.23:1 tranny
"Silent Rider. Quiets The Competition." muffler isn't so silent anymore. ITS HOLLOW! more
And, what did you do with the Pro Tec. I am really trying to hunt down a second, for a spare. I want to tear it apart and see what goes bad. And for trouble shooting (I know you dont have it any more) you unhook the temp and oil SWITCH, this cures the problem for many people.
The engine needs just a certain amount of back pressure to run properly: too little or too much ruins performance. Back pressure can be a serious problem in converting dry to wet exhaust. On wet exhaust installations you have to tune the exhaust manifolds and the rest of the system to prevent excessive back pressure. here
If I were you, i'd look around in your area for someone who has done the conversion, you are likely to get better hands on advice there. [links]
If I were you, i'd look around in your area for someone who has done the conversion, you are likely to get better hands on advice there.
Welcome to the forum and that;s a pretty boathere
Welcome to the forum and that;s a pretty boat
I have an old greek boat (this type is called "koutoulo"). It's about 16 feet long and has an old air cooled one cylinder Lister ST1 engine (about 10 HP). The exhaust goes straight up on the deck. It is rather noisy and we have always to be careful not to touch it etc, so I am thinking of converting the exhaust to wet.
There is an old belt driven raw water pump which will need a rebuild probably. I then also need a custom made mixing elbow, some meters of exhaust hoses, a water lift muffler, siphon break etc, a cost of about $150-$200.
What do you think about this? Is there a chance of having back pressure problems?
In simple terms, there are three types of cooling systems: 1. A system that pumps water straight from outside into the engine block by way of an impeller pump; 2. A separated system, often referred to as an intercooling / heat exchanger system, with coolant in the engine and an impeller pump pumping cooling water through a heat exchanger. 3. A keel cooling system, with cooling pipes containing coolant running underneath the boat. A wet exhaust is not possible in this system, unless an extra pump is installed. here
From dry to wet? Convert the dry exhaust if you would like to experience the advantages of a wet exhaust system. Fully assembled exhaust pipes are available on the market. Or just add water to the dry exhaust, where only the first section is not cooled. Conversion may require a fair amount of money, but it is an easy job for the handy do-it-yourselfer and it will pay off in due course.
( wet exhaust system with waterlock and muffler). [links]
The difference between a wet and dry exhaust explained!
Compare a dry exhaust to the exhaust pipe of the car: a pipe with a flexible connecting piece on the exhaust manifold, discharging the exhaust gases directly to the outside air. A dry muffler is often required to muffle the noise. Cooling water from the engine is added to the exhaust system either externally or at a much later stage. The tubes and pipes are often made of steel to prevent them from melting due to the high temperature. It is a simple system, but with two major drawbacks: it emits intense heat of up to 600°C at the source, and it produces more noise.
Various cooling systems here
The difference in temperature of a dry and wet exhaust is noticeable and has many advantages.
The term Dry Joint Exhaust refers to MerCruiser’s patented exhaust system which utilizes 2 coolant passages vs 4, between the manifold and riser that are separated outside of the exhaust gasket. The benefit is that this eliminates the possibility of coolant leaking into the exhaust passages through common gasket failures.
Short Dry Joint Exhaust Elbow p/n 864309T02 fits Small V8 s/n range 0M300000 and 0W309999 (pre 2005 models) – Measures 5.2 from elbow gasket flange to mounting bolt boss pad. SELECT THIS LINK TO VIEW EXHAUST DRAWING. more
Along with the new Dry Joint Exhaust on the V6 and small V8 engine models the height and down angle of the exhaust riser changed as well. MerCruiser decided that the overall height of the exhaust riser should be raised to meet the overall maximum height of the engine. Therefore MerCruiser introduced a dry joint exhaust riser which was 1.5 inches taller and also included a 14 degree down angle versus the standard 7 degree. This however then created another issue regarding the use of exhaust spacers. For example when 3 inch tall exhaust spacers were going to be installed along with the taller dry joint exhaust riser, this resulted in the overall exhaust height of that installation being 1.5 inches taller than previous installations that included 3 inch tall exhaust spacers. Therefore MerCruiser was forced to introduce the 1.7 inch tall dry joint exhaust spacer and the 4.5 inch tall dry joint exhaust spacer to account for these installations where the standard 3 inch and 6 inch exhaust spacers were already at a package height limit.