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My exhaust loop is so low that you cannot call it a loop at all.
I am going offshore and am concerned about saltwater flooding of the engine.
I have a homemade exhaust flap, I trust ti only to keep waves from slapping in suddenly, I do not trust it to seal out water over long periods.
If I put in a valve, it will be hard to reach in an emergency, and begs to have someone start the engine with it closed.
If I add a loop up into the transom (coaming?) I run the risk of too much backpressure, or worse, that the exhaust will not expel enough water and all that hose will drain back into the engine and cause the very flodding I wish to avoid.
Opinions, please.
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why no loop out of and above the muffler as per ordinary configuration?
-Adam Silverstein
(tornado boy)On Oct 23, 2008, at 9:24 AM, “Walterpiescik” < ([email][/email])> wrote:
My exhaust loop is so low that you cannot call it a loop at all.
I am going offshore and am concerned about saltwater flooding of the engine.
I have a homemade exhaust flap, I trust ti only to keep waves from slapping in suddenly, I do not trust it to seal out water over long periods.
If I put in a valve, it will be hard to reach in an emergency, and begs to have someone start the engine with it closed.
If I add a loop up into the transom (coaming?) I run the risk of too much backpressure, or worse, that the exhaust will not expel enough water and all that hose will drain back into the engine and cause the very flodding I wish to avoid.
Opinions, please.
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I don’t know. Maybe I never saw the normal configuration. Does it extend up into the port locker?
<.. snip>
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Mine is the same. Just at the cockpit floor.
I am going to have a look per Adam. Maybe the upright section out of the
muffler is high enough. Seems like it could not be higher than the cockpit
floor, though and that would not be enough to make me comfortable without a
heavy weather valve in the system.
Original Message
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Walter:
You are right. Installing a shutoff valve is probably the safest solution.
If it is installed in the hose just as it leaves the underside of the
cockpit floor, it should be easy to access. Just make it standard practice
to hang the engine keys from the valve any time it is closed.Paul
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I think the shut-off valve as Paul described is not a bad idea. I sailed across the Atlantic twice without a loop or shut-off valve, but that was more out of ignorance than a choice. I think the risk is pretty low, but the consequences are severe. With the new engine I now have a loop that goes to the top of the transom.
John
On Thu, Oct 23, 2008 at 10:58 AM, Paul Lefebvre < ([email][/email])> wrote:
Walter:
You are right. Installing a shutoff valve is probably the safest solution. If it is installed in the hose just as it leaves the underside of the cockpit floor, it should be easy to access. Just make it standard practice to hang the engine keys from the valve any time it is closed.
Paul
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Regards,
John Stevenson
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Walter
Water injection elbows come in two common styles. There is the common injection elbow and what is called a riser. I would suggest that you retrofit with a riser. Even though this barely gets the exhaust higher than the water line, Pearson positioned the water-lift on the starboard side of the engine, the opposite side from the exhaust outlet. This means that when the boat is heeled over on starboard, the water lift is on the high side of the boat. As long as you don’t broach over on starboard, water shouldn’t make its way back into the engine.When I repowered, there was insufficient room to route the exhaust over to the port side, but my new engine comes with a higher riser.
don’t forget the vented loop just before your raw water pump.
—
Rich Carter
Original message
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Just yesterday addressing the exhaust issue on Clairebuoyant. Same situation, but with our W-58, exhaust comesoff forward (boat) end of engine, and muffler and exhaust both on port side. Found a nice bronze Apollo 2″ valve at ChesapeakeMarine Fasteners (Fawcetts) and thread to hose connectors at Defender. Will install just inside transom.
Heading down ICW middle of next week. Anyone else going south?
Quent Kinderman
Clairebuoyant, #132 -
Hi, Quent.
I'm currently sitting in Beaufort, NC waiting for my crew to return in about a week. Then we head outside to the Bahamas.John
On Fri, Oct 24, 2008 at 5:23 AM, quent < ([email][/email])> wrote:
Just yesterday addressing the exhaust issue on Clairebuoyant. Same situation, but with our W-58, exhaust comesoff forward (boat) end of engine, and muffler and exhaust both on port side. Found a nice bronze Apollo 2″ valve at ChesapeakeMarine Fasteners (Fawcetts) and thread to hose connectors at Defender. Will install just inside transom.
Heading down ICW middle of next week. Anyone else going south?
Quent Kinderman
Clairebuoyant, #132—
Regards,
John Stevenson
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Bob,
I'm at Town Dock. CYAJohn
On Fri, Oct 24, 2008 at 12:31 PM, Robert Fine < ([email][/email])> wrote:
Hi John,
Am coming into Beaufort, NC tonight (10/24) on an Outer Reef 65. If time permits will be wandering around the dock. Are you anchored/moored out or in a slip?
We'll be at the town dock.
Bob
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Regards,
John Stevenson
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