Must be a 'new' version as all my Walbro pumps have
accessible/removalbe/cleanable protection screens/strainer wire.

In article , Doug Dotson
wrote:

Both my WALBRO pumps came with no replacement filters. A
large box in bold print in the instructions states the following:

" SERVICE DATA
The Walbro Marine Electronic Pump incorporates
two (2) built-in filters, one for filtering fine particles
and the other (a magnet) for trapping metalic
particles. Due to the construction of the protective
outer shell, these filters cannot be serviced."

The plastic outer shell appears to be glued together.
Perhaps this is a newer or different model than the
one you have.

Doug
s/v Callista

:
"Marc" wrote in message
...
The internal filter on the Walbro can be cleaned. In fact, they supply
a spare with the pump. Taking the pump apart is a little fussy in an
emergency situation. I am a little concerned to find out that a pump
failure may result in a blocked fuel supply due to the wobble plate.
Right now, I have the Walbro in line with my mechanical pump.


On Mon, 12 Apr 2004 17:55:34 -0400, "Doug Dotson"
wrote:

I seem to recall from the WALBRO docs that the pump is not
field servicable. Specifically, it states that the internal filters
cannot be changed.

Doug
s/v Callista

"Kelton Joyner" wrote in message
. ..
Unless you have isolation valves to allow servicing of a parallel pump,
series works just as well for backup.
fuel wil flow through the unpowered pump.
Kelton
W4IND
s/v Isle Escape

Larry W4CSC wrote:
(Steven Shelikoff) wrote in
:


That begs the question why are you going to put two pumps in parallel
if
you only want to run one at a time?

Steve



Backup?

Larry W4CSC

And whats the amperage draw (heat load) when the pump is
stalled/dead-headed vs. a blocked filter?

In article , Doug Dotson
wrote:

The lift pump in my case is only pulling through a Raycor and the
on-engine filter.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Just my experience in using Walbro pumps in recirculation systems. But
to be fair Im pushing a hefty differential pressure through a major
filter bank. With a 6 psid load I only get ~700 hrs. on my Walbro
pumps, I havent measured the amps draw but I wager its 50% of rated amp
capacity.

In article , Doug Dotson
wrote:

Interesting. Can you point me to some supporting docs that
indicates the WALBRO is not suitable as a primary pump.
This is counter to all I have heard from numerous sources
including reputable marine service outfits. Actually, the
WALBRO docs that come with the pump includes only
instructions for installing it as a list pump.

More below.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Instead of parelleling electrical lift pumps, better to install a 'day
tank' that is constantly supplied by freshly filtered fuel oil but
with
a lock-out cock (to an inverted dip tube in the day tank) so that the
day tank always keeps a full load of fuel. Then if you have
electrical
failure or filter blockage you will be able to use the 3 or 4 gallons
in the day tank to keep moving and make repairs, etc. If worse
becomes worse, you can always siphon fuel from the main tank(s) and
manually load a gravity feed 'day tank'.

Not practical in my case.

FWIW ... A Walbro IMHO is NOT a constant duty delivery pump.

Not my understanding. This pump seems to have been used for many
years as a primary fuel pump and seems to have a very reputation.

A better
solution for that application is simply an automotive 12v impulse fuel
pump. The Walbro is an intermittent transfer or recirculation pump;
but, can be so piped that if the engine mounted diaphragm lift pump
AND
the inline priming pump BOTH fail then the recirculation pump can be
used to either pressurize the system or deliver to the 'day tank'.

That is sort of what I have now. Engine mounted mechanical lift
pump with the WALBRO ahead of it. WALBRO can be used
as a backup in the case of a failure although some plumbing
has to be moved to bypass a failed mechanical pump.

And whats the amperage draw (heat load) when the pump is
stalled/dead-headed vs. a blocked filter?

In article , Doug Dotson
wrote:

The lift pump in my case is only pulling through a Raycor and the
on-engine filter.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Just my experience in using Walbro pumps in recirculation systems. But
to be fair Im pushing a hefty differential pressure through a major
filter bank. With a 6 psid load I only get ~700 hrs. on my Walbro
pumps, I havent measured the amps draw but I wager its 50% of rated amp
capacity.

In article , Doug Dotson
wrote:

Interesting. Can you point me to some supporting docs that
indicates the WALBRO is not suitable as a primary pump.
This is counter to all I have heard from numerous sources
including reputable marine service outfits. Actually, the
WALBRO docs that come with the pump includes only
instructions for installing it as a list pump.

More below.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Instead of parelleling electrical lift pumps, better to install a 'day
tank' that is constantly supplied by freshly filtered fuel oil but
with
a lock-out cock (to an inverted dip tube in the day tank) so that the
day tank always keeps a full load of fuel. Then if you have
electrical
failure or filter blockage you will be able to use the 3 or 4 gallons
in the day tank to keep moving and make repairs, etc. If worse
becomes worse, you can always siphon fuel from the main tank(s) and
manually load a gravity feed 'day tank'.

Not practical in my case.

FWIW ... A Walbro IMHO is NOT a constant duty delivery pump.

Not my understanding. This pump seems to have been used for many
years as a primary fuel pump and seems to have a very reputation.

A better
solution for that application is simply an automotive 12v impulse fuel
pump. The Walbro is an intermittent transfer or recirculation pump;
but, can be so piped that if the engine mounted diaphragm lift pump
AND
the inline priming pump BOTH fail then the recirculation pump can be
used to either pressurize the system or deliver to the 'day tank'.

That is sort of what I have now. Engine mounted mechanical lift
pump with the WALBRO ahead of it. WALBRO can be used
as a backup in the case of a failure although some plumbing
has to be moved to bypass a failed mechanical pump.

It just shuts off when it reaches pressure so draw is zero.

Doug
s/v Callista

"Rich Hampel" wrote in message
...


And whats the amperage draw (heat load) when the pump is
stalled/dead-headed vs. a blocked filter?

In article , Doug Dotson
wrote:

The lift pump in my case is only pulling through a Raycor and the
on-engine filter.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Just my experience in using Walbro pumps in recirculation systems. But
to be fair Im pushing a hefty differential pressure through a major
filter bank. With a 6 psid load I only get ~700 hrs. on my Walbro
pumps, I havent measured the amps draw but I wager its 50% of rated
amp
capacity.

In article , Doug Dotson
wrote:

Interesting. Can you point me to some supporting docs that
indicates the WALBRO is not suitable as a primary pump.
This is counter to all I have heard from numerous sources
including reputable marine service outfits. Actually, the
WALBRO docs that come with the pump includes only
instructions for installing it as a list pump.

More below.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Instead of parelleling electrical lift pumps, better to install a
'day
tank' that is constantly supplied by freshly filtered fuel oil but
with
a lock-out cock (to an inverted dip tube in the day tank) so that
the
day tank always keeps a full load of fuel. Then if you have
electrical
failure or filter blockage you will be able to use the 3 or 4
gallons
in the day tank to keep moving and make repairs, etc. If worse
becomes worse, you can always siphon fuel from the main tank(s)
and
manually load a gravity feed 'day tank'.

Not practical in my case.

FWIW ... A Walbro IMHO is NOT a constant duty delivery pump.

Not my understanding. This pump seems to have been used for many
years as a primary fuel pump and seems to have a very reputation.

A better
solution for that application is simply an automotive 12v impulse
fuel
pump. The Walbro is an intermittent transfer or recirculation
pump;
but, can be so piped that if the engine mounted diaphragm lift
pump
AND
the inline priming pump BOTH fail then the recirculation pump can
be
used to either pressurize the system or deliver to the 'day tank'.

That is sort of what I have now. Engine mounted mechanical lift
pump with the WALBRO ahead of it. WALBRO can be used
as a backup in the case of a failure although some plumbing
has to be moved to bypass a failed mechanical pump.

It just shuts off when it reaches pressure so draw is zero.

Doug
s/v Callista

"Rich Hampel" wrote in message
...


And whats the amperage draw (heat load) when the pump is
stalled/dead-headed vs. a blocked filter?

In article , Doug Dotson
wrote:

The lift pump in my case is only pulling through a Raycor and the
on-engine filter.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Just my experience in using Walbro pumps in recirculation systems. But
to be fair Im pushing a hefty differential pressure through a major
filter bank. With a 6 psid load I only get ~700 hrs. on my Walbro
pumps, I havent measured the amps draw but I wager its 50% of rated
amp
capacity.

In article , Doug Dotson
wrote:

Interesting. Can you point me to some supporting docs that
indicates the WALBRO is not suitable as a primary pump.
This is counter to all I have heard from numerous sources
including reputable marine service outfits. Actually, the
WALBRO docs that come with the pump includes only
instructions for installing it as a list pump.

More below.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Instead of parelleling electrical lift pumps, better to install a
'day
tank' that is constantly supplied by freshly filtered fuel oil but
with
a lock-out cock (to an inverted dip tube in the day tank) so that
the
day tank always keeps a full load of fuel. Then if you have
electrical
failure or filter blockage you will be able to use the 3 or 4
gallons
in the day tank to keep moving and make repairs, etc. If worse
becomes worse, you can always siphon fuel from the main tank(s)
and
manually load a gravity feed 'day tank'.

Not practical in my case.

FWIW ... A Walbro IMHO is NOT a constant duty delivery pump.

Not my understanding. This pump seems to have been used for many
years as a primary fuel pump and seems to have a very reputation.

A better
solution for that application is simply an automotive 12v impulse
fuel
pump. The Walbro is an intermittent transfer or recirculation
pump;
but, can be so piped that if the engine mounted diaphragm lift
pump
AND
the inline priming pump BOTH fail then the recirculation pump can
be
used to either pressurize the system or deliver to the 'day tank'.

That is sort of what I have now. Engine mounted mechanical lift
pump with the WALBRO ahead of it. WALBRO can be used
as a backup in the case of a failure although some plumbing
has to be moved to bypass a failed mechanical pump.

It appears these do not. Just to remove the mounting bracket
one would have to bend it out of shape quite drastically. I looked
closely at the brass caps top and bottom and it does appear that
they may be able to be pryed off. But in any case the instructions
say the filters are not servicable and there are no spares or
instructions for servicing provided.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Must be a 'new' version as all my Walbro pumps have
accessible/removalbe/cleanable protection screens/strainer wire.

In article , Doug Dotson
wrote:

Both my WALBRO pumps came with no replacement filters. A
large box in bold print in the instructions states the following:

" SERVICE DATA
The Walbro Marine Electronic Pump incorporates
two (2) built-in filters, one for filtering fine particles
and the other (a magnet) for trapping metalic
particles. Due to the construction of the protective
outer shell, these filters cannot be serviced."

The plastic outer shell appears to be glued together.
Perhaps this is a newer or different model than the
one you have.

Doug
s/v Callista

:
"Marc" wrote in message
...
The internal filter on the Walbro can be cleaned. In fact, they supply
a spare with the pump. Taking the pump apart is a little fussy in an
emergency situation. I am a little concerned to find out that a pump
failure may result in a blocked fuel supply due to the wobble plate.
Right now, I have the Walbro in line with my mechanical pump.


On Mon, 12 Apr 2004 17:55:34 -0400, "Doug Dotson"
wrote:

I seem to recall from the WALBRO docs that the pump is not
field servicable. Specifically, it states that the internal filters
cannot be changed.

Doug
s/v Callista

"Kelton Joyner" wrote in message
. ..
Unless you have isolation valves to allow servicing of a parallel
pump,
series works just as well for backup.
fuel wil flow through the unpowered pump.
Kelton
W4IND
s/v Isle Escape

Larry W4CSC wrote:
(Steven Shelikoff) wrote in
:


That begs the question why are you going to put two pumps in
parallel
if
you only want to run one at a time?

Steve



Backup?

Larry W4CSC

It appears these do not. Just to remove the mounting bracket
one would have to bend it out of shape quite drastically. I looked
closely at the brass caps top and bottom and it does appear that
they may be able to be pryed off. But in any case the instructions
say the filters are not servicable and there are no spares or
instructions for servicing provided.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Must be a 'new' version as all my Walbro pumps have
accessible/removalbe/cleanable protection screens/strainer wire.

In article , Doug Dotson
wrote:

Both my WALBRO pumps came with no replacement filters. A
large box in bold print in the instructions states the following:

" SERVICE DATA
The Walbro Marine Electronic Pump incorporates
two (2) built-in filters, one for filtering fine particles
and the other (a magnet) for trapping metalic
particles. Due to the construction of the protective
outer shell, these filters cannot be serviced."

The plastic outer shell appears to be glued together.
Perhaps this is a newer or different model than the
one you have.

Doug
s/v Callista

:
"Marc" wrote in message
...
The internal filter on the Walbro can be cleaned. In fact, they supply
a spare with the pump. Taking the pump apart is a little fussy in an
emergency situation. I am a little concerned to find out that a pump
failure may result in a blocked fuel supply due to the wobble plate.
Right now, I have the Walbro in line with my mechanical pump.


On Mon, 12 Apr 2004 17:55:34 -0400, "Doug Dotson"
wrote:

I seem to recall from the WALBRO docs that the pump is not
field servicable. Specifically, it states that the internal filters
cannot be changed.

Doug
s/v Callista

"Kelton Joyner" wrote in message
. ..
Unless you have isolation valves to allow servicing of a parallel
pump,
series works just as well for backup.
fuel wil flow through the unpowered pump.
Kelton
W4IND
s/v Isle Escape

Larry W4CSC wrote:
(Steven Shelikoff) wrote in
:


That begs the question why are you going to put two pumps in
parallel
if
you only want to run one at a time?

Steve



Backup?

Larry W4CSC

I want to be able to switch pumps with the flick
of a switch not crawling into the engine compartment to switch
valves.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Dont need check valves if you install isolation valves.

In article , Doug Dotson
wrote:

That is my concern. I think I will install both check valves
and isolation valves as well.

Doug
s/v Callista

"Steven Shelikoff" wrote in message
...
On Mon, 12 Apr 2004 13:33:26 -0000, Larry W4CSC
wrote:

(Steven Shelikoff) wrote in
:


That begs the question why are you going to put two pumps in
parallel
if
you only want to run one at a time?

Steve


Backup?

Then I wouldn't put them in parallel without isolation valves. Even
if
it works when both pumps are good, you don't know how the pump will
fail.

Steve

I want to be able to switch pumps with the flick
of a switch not crawling into the engine compartment to switch
valves.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Dont need check valves if you install isolation valves.

In article , Doug Dotson
wrote:

That is my concern. I think I will install both check valves
and isolation valves as well.

Doug
s/v Callista

"Steven Shelikoff" wrote in message
...
On Mon, 12 Apr 2004 13:33:26 -0000, Larry W4CSC
wrote:

(Steven Shelikoff) wrote in
:


That begs the question why are you going to put two pumps in
parallel
if
you only want to run one at a time?

Steve


Backup?

Then I wouldn't put them in parallel without isolation valves. Even
if
it works when both pumps are good, you don't know how the pump will
fail.

Steve

So perhaps a valve on both ends plus a check valve or maybe
two check valves. This is getting too complicated to be
worth it.

Doug
s/v Callista

"Rich Hampel" wrote in message
...
Further thoughts against paralleling such pumps:
If the internal check valves in one pump fails then the fluid will
flow retrograde in the pump that failed.... and damn little volume is
pumped by the pump that remains intact.
Typical industrial installation of such a 'system' would require a
block and bypass system of cocks/valves and bypass/lock-out piping.

In article , Steven Shelikoff
wrote:

On Mon, 12 Apr 2004 13:33:26 -0000, Larry W4CSC wrote:

(Steven Shelikoff) wrote in
:


That begs the question why are you going to put two pumps in parallel
if
you only want to run one at a time?

Steve


Backup?

Then I wouldn't put them in parallel without isolation valves. Even if
it works when both pumps are good, you don't know how the pump will
fail.

Steve