Marine or Automotive oil filter?
Lyle
Can someone tell me the difference between a marine oil filter and an
automotive oil filter. I can get a much large automotive oil filter
for a chey engine than I can a Mercrusier oil filter. Is this better
or is there something special about a Marine filter.
Thanks
Lyle
jcoogan@inna.net@mail.inna.net
In <33E081CD...@gate.net>, Harry Krause <hkr...@gate.net> writes:
>
>--
>
>Harry Krause
>Post Office Box 7575 Jacksonville, Florida 32238
>- - - - - - - - - -
>If Version 1.0 works someone goofed...
>
>
Harry, I think the questioner deserved something better than a backhanded answer!
Sir, there is no difference between the filters. As Harry points out, the Mercruiser
filter undoubtedly costs more, but is also, undoubtedly the same Fram or Ac
filter you can buy in your local auto parts store.
The myth of marine parts versus standard parts continues. True there
are some parts that are different, but for the most part, oil filters, fuel filters, even fuel
pumps are standard parts, painted black to qualify them as marine.
Harry Krause
Harry Krause
jco...@inna.net@mail.inna.net wrote:
> In <33E081CD...@gate.net>, Harry Krause <hkr...@gate.net>
> writes:
> Harry, I think the questioner deserved something better than a
> backhanded answer!
>
> Sir, there is no difference between the filters. As Harry points out,
> the Mercruiser
> filter undoubtedly costs more, but is also, undoubtedly the same Fram
> or Ac
> filter you can buy in your local auto parts store.
>
> The myth of marine parts versus standard parts continues. True there
> are some parts that are different, but for the most part, oil filters,
> fuel filters, even fuel
> pumps are standard parts, painted black to qualify them as marine.
Sigh. You're right. The marine filter will cost more. Otherwise, it is
exactly the same.
--
Harry Krause
Post Office Box 7575 Jacksonville, Florida 32238
- - - - - - - - - -
Anyone who remembers the 60's...wasn't there.
Keith & Laura Koether
Hi,
The only difference I have ever found is on certain applications where you
have a remotely mounted oil filter (I have one) the standard automotive
filter is too tall. It won't fit between the treads for the filter and the
exhaust manifold. I had a dealer cram an OMC oil filter in there one time
that was real fun getting out.
Hope this helps,
Keith & Laura Koether
Pleasure Island
Jolly Roger Marina
Mi. 447 RDB Ohio River
kkoe...@one.net
Lyle wrote in article
<93C58677DFE25F64.99C044B3...@library-proxy.airnews.ne
t>...
Kevin Kirkendall
jco...@inna.net@mail.inna.net wrote in article
<5rr6aa$c...@news.webspan.net>...
>The myth of marine parts versus standard parts continues. True there
>are some parts that are different, but for the most part, oil filters, fuel
filters, even fuel
>pumps are standard parts, painted black to qualify them as marine.
Oil filters may be the same, but the large spin on fuel filter has the
ability to separate water from fuel. Also the fuel pump is totally
different. It has an enclosed housing with a tube going to the carb, that
way if your pump fails, the leaking gas runs up the tube and kills your
engine letting you know there is a problem. If you used an automotive pump
that failed, your bilge would fill with gasoline possibly leading to your
boat becoming a thousand little boats.
Kevin Kirkendall
Rod McInnis
jco...@inna.net@mail.inna.net wrote:
> The myth of marine parts versus standard parts continues. True there
> are some parts that are different, but for the most part, oil filters, fuel filters, even fuel
> pumps are standard parts, painted black to qualify them as marine.
No, NO, NO!
The marine fuel pump *is* different than the automotive. If there is
any part that needs to remain "marine", it would be the fuel pump!
WHen a standard automotive fuel pump ruptures the diaphragm (common
failure more), gas will leak past the diaphragm. In some designs, it
can pass into the crankcase, where it does all sorts of bad things. In
other designs, the gas simply leaks out onto the ground.
Neither case is acceptable on a boat. A ruptured diaphragm can cause
gallons of fuel to leak out in a very short order.
All the marine fuel pumps that I have owned contained a dual
diaphragm, and had the air space between the diaphragms vented up to the
carberator (if your fuel pump has two hoses, or a hose and a pipe
connecting to the carberator, you have this type). A ruptured diaphragm
will then send the gas up to the carb, where it will presumably flood
out the engine and stop you before something really bad happens.
PLEASE don't swap your marine fuel pump for an automotive one. Fuel
pumps do fail, it is only a matter of time.
Rod McInnis
jcoogan@inna.net@mail.inna.net
In <5rslgd$ku1$1...@news.one.net>, "Kevin Kirkendall" <krk...@one.net> writes:
>
>
>jco...@inna.net@mail.inna.net wrote in article
><5rr6aa$c...@news.webspan.net>...
>>are some parts that are different, but for the most part, oil filters, fuel
>filters, even fuel
>>pumps are standard parts, painted black to qualify them as marine.
>
>ability to separate water from fuel. Also the fuel pump is totally
>different. It has an enclosed housing with a tube going to the carb, that
>way if your pump fails, the leaking gas runs up the tube and kills your
>engine letting you know there is a problem. If you used an automotive pump
>that failed, your bilge would fill with gasoline possibly leading to your
>boat becoming a thousand little boats.
>
>Kevin Kirkendall
>
price of a "marine" fuel pump that does the very same thing. It isn't painted black!
Kevin, I stand by my statements. The only difference between most automotive and marine parts
is the fact that marine parts are painted black and cost a lot more!
The "large spin on" fuel filter you mention, can also be obtained in any auto parts store.
Cars and trucks get condensation in their fuel systems too!
jco...@inna.net
>
G. E. Gore
Rod McInnis wrote:
>
> jco...@inna.net@mail.inna.net wrote:
>
> > The myth of marine parts versus standard parts continues. True there
> > are some parts that are different, but for the most part, oil filters, fuel filters, even fuel
> > pumps are standard parts, painted black to qualify them as marine.
>
>
> The marine fuel pump *is* different than the automotive. If there is
> any part that needs to remain "marine", it would be the fuel pump!
>
> WHen a standard automotive fuel pump ruptures the diaphragm (common
> failure more), gas will leak past the diaphragm. In some designs, it
> can pass into the crankcase, where it does all sorts of bad things. In
> other designs, the gas simply leaks out onto the ground.
>
> Neither case is acceptable on a boat. A ruptured diaphragm can cause
> gallons of fuel to leak out in a very short order.
>
> All the marine fuel pumps that I have owned contained a dual
> diaphragm, and had the air space between the diaphragms vented up to the
> carberator (if your fuel pump has two hoses, or a hose and a pipe
> connecting to the carberator, you have this type). A ruptured diaphragm
> will then send the gas up to the carb, where it will presumably flood
> out the engine and stop you before something really bad happens.
>
> PLEASE don't swap your marine fuel pump for an automotive one. Fuel
> pumps do fail, it is only a matter of time.
>
> Rod McInnis
the motive force overcoming the head loss in the fuel lines to cause
this massive amount of fuel to flow out? Lets's see msot fuel lines are
1/4" line, and the vent hole is approx 1/32" gravity is 32ft/sec
(squared) etc... If I wanted towork this out I could give you the
"massive flow rate" (probably less then 1 qt /hr). I must agree with
Harry, most marine parts are automotive parts painted a different color
with an "M" added to the part number and the cost multiplied by 10.
Gregg
Sam Cullis
~Gallons of fuel in a short period of time?????? gravity is 32ft/sec
~(squared) etc.{{.THATS THE FORMULA FOR ACCELLERATION, NOT PRESSURE AT THE
BOTTOM OF A LIQUID FILLED VESSEL. no pun intended}} If I wanted towork this out
I could give you the "massive flow rate" (probably less then 1 qt /hr).But you
would have to use a different formula . ;-}
This is way off the main point of _there would be more than enough fuel fumes to
cause a catastrophe_. Where saftey matters use marine grade.
Howmany angels can dance on the head of a pin?
Harry Krause
G. E. Gore wrote:
> Rod McInnis wrote:
> >
> > jco...@inna.net@mail.inna.net wrote:
> >
> > > The myth of marine parts versus standard parts continues. True
> there
> > > are some parts that are different, but for the most part, oil
> filters, fuel filters, even fuel
> > > pumps are standard parts, painted black to qualify them as marine.
>
> >
> > No, NO, NO!
> >
> > The marine fuel pump *is* different than the automotive. If there
> is
> > any part that needs to remain "marine", it would be the fuel pump!
> >
> > WHen a standard automotive fuel pump ruptures the diaphragm
> (common
> > failure more), gas will leak past the diaphragm. In some designs,
> it
> > can pass into the crankcase, where it does all sorts of bad things.
> In
> > other designs, the gas simply leaks out onto the ground.
> >
> >
> Gallons of fuel in a short period of time?????? What pray tell will be
>
> the motive force overcoming the head loss in the fuel lines to cause
> this massive amount of fuel to flow out? Lets's see msot fuel lines
> are
> 1/4" line, and the vent hole is approx 1/32" gravity is 32ft/sec
> (squared) etc... If I wanted towork this out I could give you the
> "massive flow rate" (probably less then 1 qt /hr). I must agree with
> Harry, most marine parts are automotive parts painted a different
> color
> with an "M" added to the part number and the cost multiplied by 10.
>
> Gregg
Whoa! The only thing "Harry" said here was that the oil filters were
the same, be they auto or marine. There are some marinized parts that
are necessary for safety on a boat and these are indeed different than
the auto parts.
--
Harry Krause
Post Office Box 7575 Jacksonville, Florida 32238
- - - - - - - - - -
Behaviorism is the art of pulling habits out
G. E. Gore
Check your elementry school physics book again. The static head on a
liquid is rho * gz/g (sub)c squared. The static head is all that will
be the driving force in this case since the pump diaphrgram is ruptured
and the pump is not drawing a suction. Of course since fuel lines in a
properly installed marine installation exit the top of the fuel tank,
then there won't be any driving head except the static head of the fuel
left in the supply line normally downstream of the water seperator.
I agree that I would be very careful about an automotive fuel pump on a
boat. The Chrylser engines used a fuel pump that had no vent on them so
you wouldn't get a leak. This was a true marinized fuel pump, not like
the GM pump that had a vent line back up to the air cleaner ot the
engine (yes the air cleaner, not the carb.) Of course we could just
solve the whole problem by using in tank electric fuel pumps like most
cars have used for the last 10 or more years, but of course then we
would have to make these sealed pumps marine grade and raise the price.
Gregg
Ri...@mnsinc.com
On Sat, 02 Aug 1997 12:59:22 -0400, " G. E. Gore" <gg...@ibm.net>
wrote:
> I must agree with
>Harry, most marine parts are automotive parts painted a different color
>with an "M" added to the part number and the cost multiplied by 10.
>
Ah, qwitcherbitchin...
Think of the poor slobs who have to buy that part with an "A" for
"Aviation."... :)
Rick Marinelli
ri...@mnsinc.com
William Bittle
Lyle wrote:
>
> Can someone tell me the difference between a marine oil filter and an
> automotive oil filter. I can get a much large automotive oil filter
> for a chey engine than I can a Mercrusier oil filter. Is this better
> or is there something special about a Marine filter.
>
> Thanks
> Lyle
I use the Fram HP series on my inboards. They are for high performance
engines, are a little larger and have a thicker body then a normal duty
filter.. You can get them through Summit racing. I think the HP8 fits
chevys. As for the 'marine' filters.. well? I have seen no difference
between them and standard auto filters ,, other then the inflated
"marina" price.. OOOoooooooooo! It's a MARINE filter.. whoopti doooo!
I am so sick of being ripped off for marine parts.. UGH! That's why I
went to classic V-Drive boats.. just plain old automotive parts.. one
heck of a lot cheaper!
B.B..
jcoogan@inna.net@mail.inna.net
>> "massive flow rate" (probably less then 1 qt /hr). I must agree with
>> Harry, most marine parts are automotive parts painted a different
>> color
>> with an "M" added to the part number and the cost multiplied by 10.
>>
>
> Whoa! The only thing "Harry" said here was that the oil filters were
>the same, be they auto or marine. There are some marinized parts that
>are necessary for safety on a boat and these are indeed different than
>the auto parts.
>--
>
>Harry Krause
>Post Office Box 7575 Jacksonville, Florida 32238
>- - - - - - - - - -
>Behaviorism is the art of pulling habits out
>
>
dend you the Napa part numbers that are a direct replacement, including overflow
provisions for the more expensive Marine part. How much is black paint worth?
Dave Brown
G. E. Gore wrote:
> engine (yes the air cleaner, not the carb.) Of course we could just
> solve the whole problem by using in tank electric fuel pumps like most
> cars have used for the last 10 or more years, but of course then we
> would have to make these sealed pumps marine grade and raise the price.
Then you would have to do a re-calculation based on how fast your bilge
would fill when a fuel line ruptured. :-)
Regards,
Dave Brown
Brown's Marina
Lawrence
In article <5s366u$m...@news.webspan.net>, jco...@inna.net@mail.inna.net says...
>
>> Whoa! The only thing "Harry" said here was that the oil filters were
>>the same, be they auto or marine. There are some marinized parts that
>>are necessary for safety on a boat and these are indeed different than
>>the auto parts.
>>--
>>
>>Harry Krause
>>Post Office Box 7575 Jacksonville, Florida 32238
>>- - - - - - - - - -
>>Behaviorism is the art of pulling habits out
>>
>>
>The overflow situation you describe is not just a marine problem. If you like,
>I will
>dend you the Napa part numbers that are a direct replacement, including overflow
>provisions for the more expensive Marine part. How much is black paint worth?
>
vent hookup and I got one for about $60 from jegs. Who can't handle $60 for a
fuel pump.
Rod McInnis
G. E. Gore wrote:
> > Rod McInnis wrote:
> Gallons of fuel in a short period of time?????? What pray tell will be
>
> the motive force overcoming the head loss in the fuel lines to cause
> this massive amount of fuel to flow out?
It is obvious that Gregg has never had a fuel pump rupture its
diaphragm. It doesn't just leak out at the head difference between the
tank and fuel pump. It sprays out, at the pressure that the fuel pump
delivers. Standard fuel pump pressure is between 3 and 6 PSI, which is
plenty to put a gallon of fuel out in only a few minutes.
Rod McInnis
Hal Lynch
A perhaps overstated case for some marine parts deleted.
G. E. Gore wrote:
> Gallons of fuel in a short period of time?????? What pray tell will be
> the motive force overcoming the head loss in the fuel lines to cause
> this massive amount of fuel to flow out? Lets's see msot fuel lines are
> 1/4" line, and the vent hole is approx 1/32" gravity is 32ft/sec
> (squared) etc... If I wanted towork this out I could give you the
> "massive flow rate" (probably less then 1 qt /hr). I must agree with
> Harry, most marine parts are automotive parts painted a different color
> with an "M" added to the part number and the cost multiplied by 10.
>
> Gregg
While you are doing your calculations, figure out how much gasoline
vapor you need in the bilge to blow up your boat.
Next calculate the price of a marine fuel pump vs. the price of:
- a new boat
- medical costs of burns and injury
- a funeral
- lawsuits.
According to my calaculations even a very expensive marine fuel
pump is cheaper than any of the above.
There are some marine parts, particularly in the fuel and electrical
systems that are necessary despite their unbelievably high prices.
You can put an automotive fuel pump, carburetor, distributer, or
starter in your boat and a failure of one or more of the above may
not cause an explosion or fire, But they might! I for one am
willing to spend a substantial sum of money on marine parts to
insure that the odds are in my favor.
hal
hidda
Rod McInnis wrote:
>
> G. E. Gore wrote:
>
> > Gallons of fuel in a short period of time?????? What pray tell will be
> >
> > the motive force overcoming the head loss in the fuel lines to cause
> > this massive amount of fuel to flow out?
>
> diaphragm. It doesn't just leak out at the head difference between the
> tank and fuel pump. It sprays out, at the pressure that the fuel pump
> delivers. Standard fuel pump pressure is between 3 and 6 PSI, which is
> plenty to put a gallon of fuel out in only a few minutes.
>
> Rod McInnis
Remember also that gasoline itself will burn, in which case, you're not
very lucky. However, it takes precious little of it to vaporize and
fill the engine compartment with explosive gas vapor. This vapor will
explode if something ignites it, in which case, you may be very unlucky
and may not even have the chance to kiss your <expletive deleted> good
bye.
GregVishey
From an automotive engineering perspective:
Marine spark plugs typically have a corrosion-resistant steel body. If
you replace your plugs every year, this only becomes a concern for the
salt-water crowd.
Oil filters are oil filters
Fuel filters for cars and for boats are typically the same construction
but the use of fuel-water separators in boats is a technology that is
really only shared in diesel cars and trucks. If the boat fuel filter
also separates water to a reservoir, then stick with the marine or known
equivalent part. don't guess here.
Spark plug wires are wires. replace them every few years to prevent
cross-firing or electrical leakage.
Distributor caps are caps. The best for ALL applications are NOT black
but are colored. Black is pigmented with carbon- a conductor and
non-black caps get better electrical isolation (dielectric) values. My
distributor caps are black (automotive) and they work fine. Want a tip
- spray your electrical system with a water displacement coating like
LPS-1.
As far a fuel pumps - enough has been said already.
As far as carb's - Boat engines do not operate at the same temperatures
as car engines. I am going to speculate a little that most marine
carburators are the same as automotive versions but their jetting would
likely be different. Note that this is not very hard to change.
Alternators - Big difference here. The marine alternators have the
brushes in a separate sealed cavity to prevent arcing from igniting
vapors. Marine only in this application.
Solenoids - marine versions sometimes have stainless steel bodies
Starters - same considerations as alternators.
Batteries - there is a great difference between electrical draw on a
boat and a car. Car batteries will work - but not very well. They do
not go deep cycle (not enough electrical capacity).
h2o...@hotmail.com
Harry Krause wrote:
>
> G. E. Gore wrote:
>
> > Rod McInnis wrote:
> > >
> > >
> > > > The myth of marine parts versus standard parts continues. True
> > there
> > > > are some parts that are different, but for the most part, oil
> > filters, fuel filters, even fuel
> > > > pumps are standard parts, painted black to qualify them as marine.
> >
> > >
> > > No, NO, NO!
> > >
> > > The marine fuel pump *is* different than the automotive. If there
> > is
> > > any part that needs to remain "marine", it would be the fuel pump!
> > >
> > > WHen a standard automotive fuel pump ruptures the diaphragm
> > (common
> > > failure more), gas will leak past the diaphragm. In some designs,
> > it
> > > can pass into the crankcase, where it does all sorts of bad things.
> > In
> > > other designs, the gas simply leaks out onto the ground.
> > >
> > >
> >
> > the motive force overcoming the head loss in the fuel lines to cause
> > are
> > 1/4" line, and the vent hole is approx 1/32" gravity is 32ft/sec
> > (squared) etc... If I wanted towork this out I could give you the
> > "massive flow rate" (probably less then 1 qt /hr). I must agree with
> > Harry, most marine parts are automotive parts painted a different
> > color
> > with an "M" added to the part number and the cost multiplied by 10.
> >
> > Gregg
>
> the same, be they auto or marine. There are some marinized parts that
> are necessary for safety on a boat and these are indeed different than
> the auto parts.
> --
>
> Harry Krause
> Post Office Box 7575 Jacksonville, Florida 32238
> - - - - - - - - - -
> Behaviorism is the art of pulling habits out
Mercruiser specifies the double oil filter, the filter within a filter,
automotive kind NOT be used on Mercruisers. If you don't agree ask
Mercruiser.
h2o...@hotmail.com
G. E. Gore wrote:
>
> Rod McInnis wrote:
> >
> > jco...@inna.net@mail.inna.net wrote:
> >
> > > The myth of marine parts versus standard parts continues. True there
> > > are some parts that are different, but for the most part, oil filters, fuel filters, even fuel
> > > pumps are standard parts, painted black to qualify them as marine.
> >
> > No, NO, NO!
> >
> > The marine fuel pump *is* different than the automotive. If there is
> > any part that needs to remain "marine", it would be the fuel pump!
> >
> > WHen a standard automotive fuel pump ruptures the diaphragm (common
> > failure more), gas will leak past the diaphragm. In some designs, it
> > can pass into the crankcase, where it does all sorts of bad things. In
> > other designs, the gas simply leaks out onto the ground.
> >
> > gallons of fuel to leak out in a very short order.
> >
> > All the marine fuel pumps that I have owned contained a dual
> > diaphragm, and had the air space between the diaphragms vented up to the
> > carberator (if your fuel pump has two hoses, or a hose and a pipe
> > connecting to the carberator, you have this type). A ruptured diaphragm
> > will then send the gas up to the carb, where it will presumably flood
> > out the engine and stop you before something really bad happens.
> >
> > PLEASE don't swap your marine fuel pump for an automotive one. Fuel
> > pumps do fail, it is only a matter of time.
> >
> > Rod McInnis
> the motive force overcoming the head loss in the fuel lines to cause
> this massive amount of fuel to flow out? Lets's see msot fuel lines are
> 1/4" line, and the vent hole is approx 1/32" gravity is 32ft/sec
> (squared) etc... If I wanted towork this out I could give you the
> "massive flow rate" (probably less then 1 qt /hr). I must agree with
> Harry, most marine parts are automotive parts painted a different color
> with an "M" added to the part number and the cost multiplied by 10.
>
> Gregg
changing that auto oil filter...right?
G. E. Gore
Rod McInnis wrote:
>
> G. E. Gore wrote:
> > > Rod McInnis wrote:
>
> > Gallons of fuel in a short period of time?????? What pray tell will be
> >
> > the motive force overcoming the head loss in the fuel lines to cause
> > this massive amount of fuel to flow out?
>
> diaphragm. It doesn't just leak out at the head difference between the
> tank and fuel pump. It sprays out, at the pressure that the fuel pump
> delivers. Standard fuel pump pressure is between 3 and 6 PSI, which is
> plenty to put a gallon of fuel out in only a few minutes.
>
> Rod McInnis
So sorry oh great one! If the diaphraghm ruptures you CAN'T PUMP
FUEL!!!! Plain simple fact. It is the diaphragm that is providing the
differential pressure when acted on by the lever arm running off the cam
on the engine that provides the motive force to move fuel. A rupture is
a sudden and catastrophic failure with little or no plastic
deformation. Now is you are refering to a small pinhole or tear then
you may still be able to pump fuel but not with a rupture. Simple
hydrodynamics theory. Of course I wouldn't expect most people
tounderstand hydrodynamics or fluid flow theory.
wl...@ctaz.com
In article <5rslgd$ku1$1...@news.one.net>,
"Kevin Kirkendall" <krk...@one.net> wrote:
>
>
> jco...@inna.net@mail.inna.net wrote in article
> <5rr6aa$c...@news.webspan.net>...
> >are some parts that are different, but for the most part, oil filters, fuel
> filters, even fuel
> >pumps are standard parts, painted black to qualify them as marine.
>
> ability to separate water from fuel. Also the fuel pump is totally
> different. It has an enclosed housing with a tube going to the carb, that
> way if your pump fails, the leaking gas runs up the tube and kills your
THANK YOU !! KEVIN
There is a major misunderstanding about "certian" marine/automotive
parts... one in particular is the fuel pump.... Everything you say is
TRUE... boat owners... heed his warning...he is correct !!
Rick Youngman
Service Manager
Lake Mohave Resort
> engine letting you know there is a problem. If you used an automotive pump
> that failed, your bilge would fill with gasoline possibly leading to your
> boat becoming a thousand little boats.
>
> Kevin Kirkendall
-------------------==== Posted via Deja News ====-----------------------
http://www.dejanews.com/ Search, Read, Post to Usenet
h2o...@hotmail.com
G. E. Gore wrote:
>
> Sam Cullis wrote:
> >
> > ~Gallons of fuel in a short period of time?????? gravity is 32ft/sec
> > ~(squared) etc.{{.THATS THE FORMULA FOR ACCELLERATION, NOT PRESSURE AT THE
> > BOTTOM OF A LIQUID FILLED VESSEL. no pun intended}} If I wanted towork this out
> > I could give you the "massive flow rate" (probably less then 1 qt /hr).But you
> > would have to use a different formula . ;-}
> >
> > This is way off the main point of _there would be more than enough fuel fumes to
> > cause a catastrophe_. Where saftey matters use marine grade.
> >
> > Howmany angels can dance on the head of a pin?
>
> Check your elementry school physics book again. The static head on a
> liquid is rho * gz/g (sub)c squared. The static head is all that will
> be the driving force in this case since the pump diaphrgram is ruptured
> and the pump is not drawing a suction. Of course since fuel lines in a
> properly installed marine installation exit the top of the fuel tank,
> then there won't be any driving head except the static head of the fuel
> left in the supply line normally downstream of the water seperator.
> I agree that I would be very careful about an automotive fuel pump on a
> boat. The Chrylser engines used a fuel pump that had no vent on them so
> you wouldn't get a leak. This was a true marinized fuel pump, not like
> the GM pump that had a vent line back up to the air cleaner ot the
> solve the whole problem by using in tank electric fuel pumps like most
> cars have used for the last 10 or more years, but of course then we
> would have to make these sealed pumps marine grade and raise the price.
>
Mercruiser does use an electric fuel pump. I know of no gas motors that
use an air cleaner, could be wrong, I thought they used CG Approved
flame arresters!
h2o...@hotmail.com
jco...@inna.net@mail.inna.net wrote:
>
> In <33E3DC50...@gate.net>, Harry Krause <hkr...@gate.net> writes:
> >
> >> Rod McInnis wrote:
> >> >
> >> >
> >> > > The myth of marine parts versus standard parts continues. True
> >> there
> >> > > are some parts that are different, but for the most part, oil
> >> filters, fuel filters, even fuel
> >> > > pumps are standard parts, painted black to qualify them as marine.
> >>
> >> >
> >> >
> >> > The marine fuel pump *is* different than the automotive. If there
> >> is
> >> > any part that needs to remain "marine", it would be the fuel pump!
> >> >
> >> > WHen a standard automotive fuel pump ruptures the diaphragm
> >> (common
> >> > failure more), gas will leak past the diaphragm. In some designs,
> >> it
> >> > can pass into the crankcase, where it does all sorts of bad things.
> >> In
> >> > other designs, the gas simply leaks out onto the ground.
> >> >
> >> >
> >>
> >> the motive force overcoming the head loss in the fuel lines to cause
> >> are
> >> 1/4" line, and the vent hole is approx 1/32" gravity is 32ft/sec
> >> (squared) etc... If I wanted towork this out I could give you the
> >> "massive flow rate" (probably less then 1 qt /hr). I must agree with
> >> Harry, most marine parts are automotive parts painted a different
> >> color
> >> with an "M" added to the part number and the cost multiplied by 10.
> >>
> >> Gregg
> >
> >the same, be they auto or marine. There are some marinized parts that
> >are necessary for safety on a boat and these are indeed different than
> >the auto parts.
> >--
> >
> >Harry Krause
> >Post Office Box 7575 Jacksonville, Florida 32238
> >- - - - - - - - - -
> >Behaviorism is the art of pulling habits out
> >
> >
> dend you the Napa part numbers that are a direct replacement, including overflow
> provisions for the more expensive Marine part. How much is black paint worth?
>
NAPA is owned by Echlin Corp. who also owns Sierra Inc. the largest
supplier of aftermarket marine engine parts. Yes you can buy Sierra
parts under the NAPA name so what? It comes down to marine parts vs auto
parts, what is your life worth? A little more than black paint I would
guess, but then again. BTW a matine fuel pump upon failing can emit NO
gas. A little makes a big boom.
G. E. Gore
Bill McKee wrote:
>
> G. E. Gore wrote:
> >
> > >
> > > diaphragm. It doesn't just leak out at the head difference between the
> > > tank and fuel pump. It sprays out, at the pressure that the fuel pump
> > > delivers. Standard fuel pump pressure is between 3 and 6 PSI, which is
> > > plenty to put a gallon of fuel out in only a few minutes.
> > >
> > > Rod McInnis
> >
> > So sorry oh great one! If the diaphraghm ruptures you CAN'T PUMP
> > FUEL!!!! Plain simple fact. It is the diaphragm that is providing the
> > differential pressure when acted on by the lever arm running off the cam
> > on the engine that provides the motive force to move fuel. A rupture is
> > a sudden and catastrophic failure with little or no plastic
> > deformation. Now is you are refering to a small pinhole or tear then
> > you may still be able to pump fuel but not with a rupture. Simple
> > hydrodynamics theory. Of course I wouldn't expect most people
> > tounderstand hydrodynamics or fluid flow theory.
>
> Oh great one is RIGHT. The diaphragm gets a hole and sprays gas out in
> copious quantity! The engine keeps running until it catches on fire or
> the car runs out of gas. Example, years ago driving behind my buddy at
> at least 50mph I see a trail of wet spots on the road. Pull him over
> and we see the fuel pump is leaking. Had to drive 5 miles back to
> civilization, and he used at least 5 gallons of gas.
> The hydrodynamics is that the split allows part of the gas to get on top
> of the diaphram on the compression stroke, then the on the vacumn or
> suck more gas in to the chamber, there is less pressure on the diaphram
> and it does not leak as much back. On the vacumn stroke it is a
> compression stroke to the low pressure side of the diaphram and BLOWS
> the fuel out the vent hole.
> regards, Bill
> (got an A in fluid dynamics d;O )--
> Opinions expressed are mine not necessarily my employers.
> All other standard disclaimers apply!
> Remove nospam. To email reply.
Nuclear engineer and Nuclear Quality Assurance Officer. I will once
again state that a rupture which was what was originally said is not the
same as a small leak in the diaphgram. If the diaphgram ruptures then
no pump action and only static head effects on the fuel flow, to
overcome head loss in the filter, and fuel line.