Hi all,

I am advised to flush a raw-water cooling system on a Yanmar 2GM with fresh
water. I have a couple of questions on execution to any kind soul that can
offer some advice.

I'm thinking of running a dock hose down and hooking it up to the hose
coming off the through-hull intake, turning the faucet on, starting the
engine and just letting it go. However, I'm concerned about overpressuring
the system and filling the water lift to the point it dumps into the
engine. Is this a valid concern? Is there a better way to accomplish this?
There's always positive pressure on the system from the through-hull
anyway, so I'm assuming as long as I'm pressurizing it from upstream of the
water pump, I'm safe. True?

Many thanks,

I am advised to flush a raw-water cooling system on a Yanmar 2GM with fresh
water.

whoever advised you of that didn't know WTF they were talking about. Don't
waste your time worrying about it.

Second that
"JAXAshby" wrote in message
...
I am advised to flush a raw-water cooling system on a Yanmar 2GM with
fresh
water.

whoever advised you of that didn't know WTF they were talking about.
Don't
waste your time worrying about it.

Second that
"JAXAshby" wrote in message
...
I am advised to flush a raw-water cooling system on a Yanmar 2GM with
fresh
water.

whoever advised you of that didn't know WTF they were talking about.
Don't
waste your time worrying about it.

I am advised to flush a raw-water cooling system on a Yanmar 2GM with fresh
water.

whoever advised you of that didn't know WTF they were talking about. Don't
waste your time worrying about it.

Comments below:

"Jeffrey P. Vasquez" wrote in
message ...
Hi all,

I am advised to flush a raw-water cooling system on a Yanmar 2GM with
fresh
water. I have a couple of questions on execution to any kind soul that can
offer some advice.

I'm thinking of running a dock hose down and hooking it up to the hose
coming off the through-hull intake, turning the faucet on, starting the
engine and just letting it go. However, I'm concerned about overpressuring
the system and filling the water lift to the point it dumps into the
engine. Is this a valid concern? Is there a better way to accomplish this?
There's always positive pressure on the system from the through-hull
anyway, so I'm assuming as long as I'm pressurizing it from upstream of
the
water pump, I'm safe. True?

Many thanks,

Should work but...

We usually do this by extending the thru hull hose with another short piece
of hose up into a 5 gallon bucket set in the cockpit. We then start the
engine and let the raw water pump move the water through. We keep the
bucket full by leaving the dock hose running into the bucket, if it
overflows it just runs out the cockpit drains. No chance of
over-pressurising anything or damaging your raw water pump. As we live in
Canada and so have to winterise this system, we then throw some antifreeze
into the bucket and let that pump through until it starts to come out the
exhaust, shut it down and that's it for the season.
--
Ken Heaton & Anne Tobin
Cape Breton Island, Canada
kenheaton AT ess wye dee DOT eastlink DOT ca

Ken, he is not talking about winterizing his engine, he is talking about
"flushing" the raw water cooling system of salt.


Hi all,

I am advised to flush a raw-water cooling system on a Yanmar 2GM with
fresh
water. I have a couple of questions on execution to any kind soul that can
offer some advice.

I'm thinking of running a dock hose down and hooking it up to the hose
coming off the through-hull intake, turning the faucet on, starting the
engine and just letting it go. However, I'm concerned about overpressuring
the system and filling the water lift to the point it dumps into the
engine. Is this a valid concern? Is there a better way to accomplish this?
There's always positive pressure on the system from the through-hull
anyway, so I'm assuming as long as I'm pressurizing it from upstream of
the
water pump, I'm safe. True?

Many thanks,

Should work but...

We usually do this by extending the thru hull hose with another short piece
of hose up into a 5 gallon bucket set in the cockpit. We then start the
engine and let the raw water pump move the water through. We keep the
bucket full by leaving the dock hose running into the bucket, if it
overflows it just runs out the cockpit drains. No chance of
over-pressurising anything or damaging your raw water pump. As we live in
Canada and so have to winterise this system, we then throw some antifreeze
into the bucket and let that pump through until it starts to come out the
exhaust, shut it down and that's it for the season.
--
Ken Heaton & Anne Tobin
Cape Breton Island, Canada
kenheaton AT ess wye dee DOT eastlink DOT ca

Ken, he is not talking about winterizing his engine, he is talking about
"flushing" the raw water cooling system of salt.


Hi all,

I am advised to flush a raw-water cooling system on a Yanmar 2GM with
fresh
water. I have a couple of questions on execution to any kind soul that can
offer some advice.

I'm thinking of running a dock hose down and hooking it up to the hose
coming off the through-hull intake, turning the faucet on, starting the
engine and just letting it go. However, I'm concerned about overpressuring
the system and filling the water lift to the point it dumps into the
engine. Is this a valid concern? Is there a better way to accomplish this?
There's always positive pressure on the system from the through-hull
anyway, so I'm assuming as long as I'm pressurizing it from upstream of
the
water pump, I'm safe. True?

Many thanks,

Should work but...

We usually do this by extending the thru hull hose with another short piece
of hose up into a 5 gallon bucket set in the cockpit. We then start the
engine and let the raw water pump move the water through. We keep the
bucket full by leaving the dock hose running into the bucket, if it
overflows it just runs out the cockpit drains. No chance of
over-pressurising anything or damaging your raw water pump. As we live in
Canada and so have to winterise this system, we then throw some antifreeze
into the bucket and let that pump through until it starts to come out the
exhaust, shut it down and that's it for the season.
--
Ken Heaton & Anne Tobin
Cape Breton Island, Canada
kenheaton AT ess wye dee DOT eastlink DOT ca

On Mon, 26 Jan 2004 22:32:38 -0400, "Ken Heaton"
wrote:



We usually do this by extending the thru hull hose with another short piece
of hose up into a 5 gallon bucket set in the cockpit. We then start the
engine and let the raw water pump move the water through. We keep the
bucket full by leaving the dock hose running into the bucket, if it
overflows it just runs out the cockpit drains. No chance of
over-pressurising anything or damaging your raw water pump. As we live in
Canada and so have to winterise this system, we then throw some antifreeze
into the bucket and let that pump through until it starts to come out the
exhaust, shut it down and that's it for the season.

This is the recommended method. You can make it easier by putting a
Y-valve above the thru-hull, The hose on the Y can have a garden hose
end on it and can be looped above the waterline if you are paranoid.

An added, if emergency, benefit of this is that you can wrap some sort
of strainer (a piece of nylon mesh, whatever) on the end of this and
in an emergency can use this hose to drain your bilges using the
engine's water pump. It's not as motivated as a man with a bucket, but
it will go longer while you are dealing with getting the boat in
order.

R.

hey, you guys, kindly knock it off. You don't have a clew what you are talking
about in this case.

Leanne, it will cost you several thousand dollars to repair the damage there
guys are trying to do to your engine. Just send me $2,000 (in used bills,
please) and I will walk over to St Patrick's cathedral and light a candle for
you. That way you will save a LOT of money over a rebuild.


We usually do this by extending the thru hull hose with another short piece
of hose up into a 5 gallon bucket set in the cockpit. We then start the
engine and let the raw water pump move the water through. We keep the
bucket full by leaving the dock hose running into the bucket, if it
overflows it just runs out the cockpit drains. No chance of
over-pressurising anything or damaging your raw water pump. As we live in
Canada and so have to winterise this system, we then throw some antifreeze
into the bucket and let that pump through until it starts to come out the
exhaust, shut it down and that's it for the season.

This is the recommended method. You can make it easier by putting a
Y-valve above the thru-hull, The hose on the Y can have a garden hose
end on it and can be looped above the waterline if you are paranoid.

An added, if emergency, benefit of this is that you can wrap some sort
of strainer (a piece of nylon mesh, whatever) on the end of this and
in an emergency can use this hose to drain your bilges using the
engine's water pump. It's not as motivated as a man with a bucket, but
it will go longer while you are dealing with getting the boat in
order.

R.