Yanmar QM15/GM15
 

I'm looking for a site that has information on these two engines. I'm
about to acquire one not sure if it's QM or GM. Is raw water cooled
would like to possibly convert it to fresh water cooling.

--

Yanmar QM15/GM15
 

James,

Try contacting SenDure Products:
http://www.sen-dure.com/

They used to supply kits for all kinds of things.

Matt Colie
--
target of diversity
victim of affirmative action
refugee from the war on poverty
minimized by political correctness


James wrote:
I'm looking for a site that has information on these two engines. I'm
about to acquire one not sure if it's QM or GM. Is raw water cooled
would like to possibly convert it to fresh water cooling.

Yanmar QM15/GM15
 

On Apr 6, 9:17 am, "James" wrote:
I'm looking for a site that has information on these two engines. I'm
about to acquire one not sure if it's QM or GM. Is raw water cooled
would like to possibly convert it to fresh water cooling.

--

Call the yanmar rep and get the mechanics man for the engine you
recive. and either buy the tool kit with the spcail tools or find a
local repaire place that will let you copy the tools they have. Yan
mars can be bloody touchy but the manual can let you rebuild almost
the entire engine.

Yanmar QM15/GM15
 

On Apr 6, 9:17 am, "James" wrote:
I'm looking for a site that has information on these two engines. I'm
about to acquire one not sure if it's QM or GM. Is raw water cooled
would like to possibly convert it to fresh water cooling.

--

Hi:

As a 3QM30H owner built in 1978, why do you fell it is necessary to
convert to fresh water cool?

I am braced for all the flames..........................,
Keep It Simple Bob

Yanmar QM15/GM15
 

Bob wrote:

On Apr 6, 9:17 am, "James" wrote:
I'm looking for a site that has information on these two engines.
I'm about to acquire one not sure if it's QM or GM. Is raw water
cooled would like to possibly convert it to fresh water cooling.

--

Hi:

As a 3QM30H owner built in 1978, why do you fell it is necessary to
convert to fresh water cool?

I am braced for all the flames..........................,
Keep It Simple Bob

We're considering adding a hot water heater to the boat. Jim

--

Yanmar QM15/GM15
 

With absolutely no flame intended ... a fresh water cooled engine will
last longer, can be run at higher operating temperatures thus better
combustion efficiency, etc. etc. There are many sources of 'add-on'
or conversions to make an old raw cooled into a freshwater cooled
engine. The Atomic-4 fans have been doing it for years and consider it
to be THE most efficient and least costly item to prolong an engine's
service life.

What usually 'kills' a marine diesel is internal corrosion of the
block, etc. NOT the engine 'wearing out'. Freshwater cooling nearly
eliminates that probability and no matter or whether the raw water side
is cooled with freshwater or sal****er.

:-)


In article . com, Bob
wrote:

On Apr 6, 9:17 am, "James" wrote:
I'm looking for a site that has information on these two engines. I'm
about to acquire one not sure if it's QM or GM. Is raw water cooled
would like to possibly convert it to fresh water cooling.

--

Hi:

As a 3QM30H owner built in 1978, why do you fell it is necessary to
convert to fresh water cool?

I am braced for all the flames..........................,
Keep It Simple Bob

Yanmar QM15/GM15
 

Rich,
You are completely correct, and that aside.

James,
As you are looking to get hot water heater of the engine jacket, do some
careful research. It is possible to do this by breaking into the
coolant cycle inside the thermostat on most engines. This may not
require the closed cooling conversion.

Matt Colie
Lifelong Waterman, Licensed Mariner and Pathological Sailor



Rich Hampel wrote:
With absolutely no flame intended ... a fresh water cooled engine will
last longer, can be run at higher operating temperatures thus better
combustion efficiency, etc. etc. There are many sources of 'add-on'
or conversions to make an old raw cooled into a freshwater cooled
engine. The Atomic-4 fans have been doing it for years and consider it
to be THE most efficient and least costly item to prolong an engine's
service life.

What usually 'kills' a marine diesel is internal corrosion of the
block, etc. NOT the engine 'wearing out'. Freshwater cooling nearly
eliminates that probability and no matter or whether the raw water side
is cooled with freshwater or sal****er.

:-)


In article . com, Bob
wrote:

On Apr 6, 9:17 am, "James" wrote:
I'm looking for a site that has information on these two engines. I'm
about to acquire one not sure if it's QM or GM. Is raw water cooled
would like to possibly convert it to fresh water cooling.

--
Hi:

As a 3QM30H owner built in 1978, why do you fell it is necessary to
convert to fresh water cool?

I am braced for all the flames..........................,
Keep It Simple Bob

Yanmar QM15/GM15
 

On Apr 12, 1:53 pm, Rich Hampel wrote:
With absolutely no flame intended ... a fresh water cooled engine will
last longer,


I guess this is where I say, mine has lasted since 1978. My raw water
cooled has worked just fine at 140 F...

I agree on paper that fresh water cooled has many advantages, but in
reality that 750 lb anvil has worked well on raw water for 30 years.
If aint broke why fix it?
Bob