Subject: Fuel transfer/polishing pump
From: "Len Krauss"

As for stirring up the crud, one guy told me he shoots a jet of air around
the bottom of his tanks. Has a small L-shaped copper tube on an air hose,
and with it tied to a dowel/rod pushes it to bottom and "aims" it around.
He'll them sometimes just let the thing bubble away while polishing to help
keep particulate matter in suspension.


But he is only stirring up one baffeled area in the tank unless he has access
plates to each area.

No offense, but how many of you have actually seen the insides of a well built
marine fuel tank?

Capt. Bill

Subject: Fuel transfer/polishing pump
From: "Len Krauss"

That works.

Only if your tank has no baffels.

Capt. Bill

Subject: Fuel transfer/polishing pump
From: "Len Krauss"

That works.

Only if your tank has no baffels.

Capt. Bill

Subject: Fuel transfer/polishing pump
From: "Len Krauss"

Doug - Since you're messing around with changes, you might what to have a
look at what friend Ray did for ideas if nothing else. See:
http://sundowner.thebilge.com/fuelsystem.htm
Len

"So far the system has been great. After the initial polishing of all of the
old fuel (it turned out to be perfectly clean wouldn't you know!), I have had
no issues at all.

Now they're is a glowing unbiased review.
:-)

Capt. Bill

Subject: Fuel transfer/polishing pump
From: "Len Krauss"

Doug - Since you're messing around with changes, you might what to have a
look at what friend Ray did for ideas if nothing else. See:
http://sundowner.thebilge.com/fuelsystem.htm
Len

"So far the system has been great. After the initial polishing of all of the
old fuel (it turned out to be perfectly clean wouldn't you know!), I have had
no issues at all.

Now they're is a glowing unbiased review.
:-)

Capt. Bill

Bill,

That's what I used to have and it lead to the failure of my
lift pump. That's why Yanmar sent me a letter threatening to void
my warranty it I used any filter smaller than 30 uM. That's
why the mechanic in FL said that they replace hundreds of failed
lift pumps a year due to folks using 2 uM Raycors. Mostly because
the engine mounted filters are harder to charge because they
generally require the system to be bled. So folks use a Raycor that
is too small out of laziness to avoid changing the engine filter. The
stress on the lift pump causes it to fail prematurely.

Engine is a Perkins 4-236. It burns 1 GPH. Don't know the true
flow rate but the return flow rate is pretty small.

Doug

"LaBomba182" wrote in message
...
The filter on the engine seems to prevent ,ost remaining gunk from
reaching
the injector pump and injectors. It must since it seems to be the one
that
was clogging up most.


Like I said, look into putting a large size small micron filter BEFORE the
engine mounted one. I want my filtration system to stop crud before it
gets to
the engine filter.
By the way, and I might have missed this, what kind of engine do you
have? And
what is it's true GHP flow rating? In other words it's burn plus return
GPH.

Capt. Bill
Capt. Bill

Bill,

That's what I used to have and it lead to the failure of my
lift pump. That's why Yanmar sent me a letter threatening to void
my warranty it I used any filter smaller than 30 uM. That's
why the mechanic in FL said that they replace hundreds of failed
lift pumps a year due to folks using 2 uM Raycors. Mostly because
the engine mounted filters are harder to charge because they
generally require the system to be bled. So folks use a Raycor that
is too small out of laziness to avoid changing the engine filter. The
stress on the lift pump causes it to fail prematurely.

Engine is a Perkins 4-236. It burns 1 GPH. Don't know the true
flow rate but the return flow rate is pretty small.

Doug

"LaBomba182" wrote in message
...
The filter on the engine seems to prevent ,ost remaining gunk from
reaching
the injector pump and injectors. It must since it seems to be the one
that
was clogging up most.


Like I said, look into putting a large size small micron filter BEFORE the
engine mounted one. I want my filtration system to stop crud before it
gets to
the engine filter.
By the way, and I might have missed this, what kind of engine do you
have? And
what is it's true GHP flow rating? In other words it's burn plus return
GPH.

Capt. Bill
Capt. Bill

"LaBomba182" wrote in message
...
Subject: Fuel transfer/polishing pump
From: "Doug Dotson"

Makes sense, but there is quite alot of evidence out there that
a polishing system is a good thing to have. I can't really
increase the size of my on-engine filter. I could increase the
size of the Raycor, but at the pore sizes I run (30 micron) in it make it
necessary to change the on-engine filter regularly as well.
Bigger Raycor won't fix the problem.

What's the GPH on your engine?

1 GPH is what I consume. Don't know the fuel return rate.

If you go to a larger Racor you could easily change to a smaller micron
element. It fact, I have never understood why people don't run as small a
micron element as they can in the first filter after the fuel tank. Why
let
anything near the micron size of the engine mounted filter get to that
filter
at all?

Because small filters ahead of the lift pump stress the pump and cause
premature failure. No fun.

Capt. Bill

"LaBomba182" wrote in message
...
Subject: Fuel transfer/polishing pump
From: "Doug Dotson"

Makes sense, but there is quite alot of evidence out there that
a polishing system is a good thing to have. I can't really
increase the size of my on-engine filter. I could increase the
size of the Raycor, but at the pore sizes I run (30 micron) in it make it
necessary to change the on-engine filter regularly as well.
Bigger Raycor won't fix the problem.

What's the GPH on your engine?

1 GPH is what I consume. Don't know the fuel return rate.

If you go to a larger Racor you could easily change to a smaller micron
element. It fact, I have never understood why people don't run as small a
micron element as they can in the first filter after the fuel tank. Why
let
anything near the micron size of the engine mounted filter get to that
filter
at all?

Because small filters ahead of the lift pump stress the pump and cause
premature failure. No fun.

Capt. Bill

Not sure that matters much. If the fuel can negoatiate the baffles
then I suspect the crud can as well. Hence the problem. Once the
fuel is shaken not stirred

Doug

"LaBomba182" wrote in message
...
Subject: Fuel transfer/polishing pump
From: "Len Krauss"

That works.

Only if your tank has no baffels.

Capt. Bill