 |
|
|
|
Next: Stylite Foam - Anybody Used This?
|
| Author |
Message |
External
Since: Nov 30, 2003
Posts: 7
|
(Msg. 1) Posted: Sun Nov 30, 2003 9:44 pm
Post subject: inventing a different kind of fresh water engine flush
Archived from groups: rec>boats>building (more info?)
|
|
|
I have a boat with 2 each 380hp 454s, a 7Kw Westerbeke genset, and air
conditioning. (no consumption jokes, please)
I run this in Fl. salt water. Because of the waterlift muffler systems
on the engines and the gen, I can't use the Mercruiser fresh flush
inlets on the engines. They need to be run, and fresh water must
replace salt water at the pump intakes. Same for the air conditioner
pump.
I'm thinking about rigging a water tank in the engine room that would
have hoses attached and then have them Y into the water pickups,
probably after the sea strainers, with a Y valve, or gate valves.
I would only run one engine at a time, and only long enough for it to
push fresh through the system. Outside of just trying it with a
bucket, or something, what's the easiest way to calculate the
anticipated water consumption for this engine at say, 900 RPM, and for
the Westerbeke? The A/C will be a sub set, for sure.
The tank could be refilled between engine flushes, but I'd rather get
one that could accomodate everything. Another angle would be to tap
into the ship's 70 gal fresh water tank, but that's across the vessel,
and the runs would be long. |
|
| Back to top |
|
 | |
External
Since: Jul 31, 2003
Posts: 490
|
(Msg. 2) Posted: Mon Dec 01, 2003 8:59 am
Post subject: Re: inventing a different kind of fresh water engine flush [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
sadler DeleteThis @comcast.net (C. Sadler) wrote in message news:<c627c0b2.0311301844.42a09fa DeleteThis @posting.google.com>...
> I have a boat with 2 each 380hp 454s, a 7Kw Westerbeke genset, and air
> conditioning. (no consumption jokes, please)
>
> I run this in Fl. salt water. Because of the waterlift muffler systems
> on the engines and the gen, I can't use the Mercruiser fresh flush
> inlets on the engines. They need to be run, and fresh water must
> replace salt water at the pump intakes. Same for the air conditioner
> pump.
>
> I'm thinking about rigging a water tank in the engine room that would
> have hoses attached and then have them Y into the water pickups,
> probably after the sea strainers, with a Y valve, or gate valves.
Maybe I am missing something here, but why not just hook a fresh water
hose in at this point instead of trying to feed it with a tank?
Scotty<!-- ~MESSAGE_AFTER~ --> |
|
| Back to top |
|
| |
External
Since: Nov 28, 2003
Posts: 8
|
(Msg. 3) Posted: Tue Dec 02, 2003 12:19 am
Post subject: Re: inventing a different kind of fresh water engine flush ( [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
Are you shure you cannot use the LATEST flush kit by Merc.?
marine.tech.RemoveThis@sympatico.ca
"C. Sadler" <sadler.RemoveThis@comcast.net> a écrit dans le message de
news:c627c0b2.0311301844.42a09fa@posting.google.com...
> I have a boat with 2 each 380hp 454s, a 7Kw Westerbeke genset, and air
> conditioning. (no consumption jokes, please)
>
> I run this in Fl. salt water. Because of the waterlift muffler systems
> on the engines and the gen, I can't use the Mercruiser fresh flush
> inlets on the engines. They need to be run, and fresh water must
> replace salt water at the pump intakes. Same for the air conditioner
> pump.
>
> I'm thinking about rigging a water tank in the engine room that would
> have hoses attached and then have them Y into the water pickups,
> probably after the sea strainers, with a Y valve, or gate valves.
>
> I would only run one engine at a time, and only long enough for it to
> push fresh through the system. Outside of just trying it with a
> bucket, or something, what's the easiest way to calculate the
> anticipated water consumption for this engine at say, 900 RPM, and for
> the Westerbeke? The A/C will be a sub set, for sure.
>
> The tank could be refilled between engine flushes, but I'd rather get
> one that could accomodate everything. Another angle would be to tap
> into the ship's 70 gal fresh water tank, but that's across the vessel,
> and the runs would be long.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: inventing a different kind of fresh water engine flush |
|
| Back to top |
|
| |
External
Since: Nov 30, 2003
Posts: 7
|
(Msg. 4) Posted: Tue Dec 02, 2003 10:30 pm
Post subject: Re: inventing a different kind of fresh water engine flush [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
What you're missing is that I don't think a garden hose will feed a
454 on the inlet side of the water pump while running. Maybe I'm
wrong. Just not sure how to predict that. I can't just use the
manifold flush built in to the engines because these, and the genset
have Vernalift water lift muffler systems, which REQUIRE the engine to
be running in order to lift the water from the cannister. Using the
inlet without the engine running would flood the cylinders, and
running the engine without replacing the seawater pickup is obviously
not going to accomplish anything.
since I have 2 engines, a generator, and an air conditioner pump, why
not develop a system that could flush all of em with the least amount
of fuss?
> Maybe I am missing something here, but why not just hook a fresh water
> hose in at this point instead of trying to feed it with a tank?
> Scotty<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: inventing a different kind of fresh water engine flush |
|
| Back to top |
|
| |
External
Since: Nov 30, 2003
Posts: 7
|
(Msg. 5) Posted: Wed Dec 03, 2003 3:41 pm
Post subject: Re: inventing a different kind of fresh water engine flush ( [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"jean" <marine.tech.RemoveThis@sympatico.ca> wrote in message news:<sZSyb.4506$yd.788651@news20.bellglobal.com>...
> Are you shure you cannot use the LATEST flush kit by Merc.?
> marine.tech.RemoveThis@sympatico.ca
>
> "C. Sadler" <sadler.RemoveThis@comcast.net> a écrit dans le message de
> news:c627c0b2.0311301844.42a09fa@posting.google.com...
> > I have a boat with 2 each 380hp 454s, a 7Kw Westerbeke genset, and air
> > conditioning. (no consumption jokes, please)
> >
From the Mercrusier installation/operation manual (these are 1998
engines)
WARNING: Do not use the flush fitting if you have a water lift muffler
system.
My assumption is that you must have the engine running to create a
lift with the exhaust. If you do not run the engine, as these fittings
were designed, you will fill the muffler, and water will back into the
engine. If I run the engine, I will simply be mixing more salt water
in with the fresh.
Are you aware of a kit specifically designed for water lifts? I'm
guessing that it would be replacing the water flow at the intake of
the raw water pump, either through strainer adapter fittings (hose
fittings on the sea strainer lids), or some other way of injecting
fresh water in place of salt.
I'm skeptical that a garden hose can flow 10 gallons a minute at 10psi
from a 5/8" hose to a 1.25" hose. (and that's at 900 RPM). Am I being
over cautious?<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: inventing a different kind of fresh water engine flush |
|
| Back to top |
|
| |
External
Since: Sep 04, 2003
Posts: 176
|
(Msg. 6) Posted: Wed Dec 03, 2003 7:10 pm
Post subject: Re: inventing a different kind of fresh water engine flush ( [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
C. Sadler wrote:
> From the Mercrusier installation/operation manual (these are 1998
> engines)
> WARNING: Do not use the flush fitting if you have a water lift muffler
> system.
>
> My assumption is that you must have the engine running to create a
> lift with the exhaust. If you do not run the engine, as these fittings
> were designed, you will fill the muffler, and water will back into the
> engine. If I run the engine, I will simply be mixing more salt water
> in with the fresh.
>
> Are you aware of a kit specifically designed for water lifts? I'm
> guessing that it would be replacing the water flow at the intake of
> the raw water pump, either through strainer adapter fittings (hose
> fittings on the sea strainer lids), or some other way of injecting
> fresh water in place of salt.
>
> I'm skeptical that a garden hose can flow 10 gallons a minute at 10psi
> from a 5/8" hose to a 1.25" hose. (and that's at 900 RPM). Am I being
> over cautious?
A 5/8" garden hose will deliver about 10 GPM at a pressure drop of 6 PSI
so with the engine pump pulling and the water system pushing you should
be pretty safe.
--
Glenn Ashmore
I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: <a style='text-decoration: underline;' href="http://www.rutuonline.com" target="_blank">http://www.rutuonline.com</a>
Shameless Commercial Division: <a style='text-decoration: underline;' href="http://www.spade-anchor-us.com" target="_blank">http://www.spade-anchor-us.com</a><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: inventing a different kind of fresh water engine flush |
|
| Back to top |
|
| |
External
Since: Nov 30, 2003
Posts: 7
|
(Msg. 7) Posted: Thu Dec 04, 2003 11:08 pm
Post subject: Re: inventing a different kind of fresh water engine flush ( [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
Glenn Ashmore <gashmore DeleteThis @mindspring.com> wrote in message news:<fpszb.77476> A 5/8" garden hose will deliver about 10 GPM at a pressure drop of 6 PSI
> so with the engine pump pulling and the water system pushing you should
> be pretty safe.
Now you're talking. That makes me less leary of the Perko inline flush
kits.
If only they weren't plastic with a spring......
Had a friend lose one of these between West End and West Palm as it
split in half, but that's another soggy story.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: inventing a different kind of fresh water engine flush |
|
| Back to top |
|
| |
External
Since: Nov 30, 2003
Posts: 7
|
(Msg. 8) Posted: Thu Dec 04, 2003 11:11 pm
Post subject: Re: inventing a different kind of fresh water engine flush ( [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
|
|
| Back to top |
|
| |
| Related Topics: | Looking for 125-150 psi fresh water pump - Need a 12 VDC potable water pump that puts out 125-150 psi at about 1 gal per min - this is low usage so cheap is good. Any suggestions.
Hull Paint for Fresh Water - I will soon be painting a small 14' skiff that will never see salt water and will be summer only wet. I don't want to use antifouling paint so what would be a good choice? The hull is marine plywood with a coating of epoxy. Walter
Zincs Needed In Fresh Water? - Hi I was wondering if anyone knows if you need to have zincs on your prop shaft in fresh water?The one on mine looks original(20+ years) and still appears 99% intact. Thanks Dave
Fresh Water System Design Ideas. - Listers, I have been working on a fresh water system to install on a 45 foot cruising monohull sailboat. Does anyone know of any online schematics or idea lists that may provide me with another line of thought? Any books you have found helpful would b...
WTB: Diesel Engine 10 to 16 HP Water Cooled Running or NOT.. - Looking to buy a diesel engine 10 to 16 HP to make a genset/fridge pump/DC genset/Tank Fill/Water maker unit out of. Bring all offers. Thanks |
|
You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
|
|
|
|
|
FAQ
Profile
Private Messages
Log in
