Racor strongly recommends that filters be operated under vacuum rather
than pressure. I believe the idea being safety. Better for a leak to
pull in air than spray fuel.

Doug Dotson wrote:
I am assembling my posihing system. Not clear whether it is better
to put the pump on the pressure side or the vacuum side. Having no
filter on the intake of the pump seems risky. I am using a 2 stage
approach. maybe putting the filter between the filters is an option.

Doug
s/v Callista



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Interesting. More tradeoffs. I have been told (by Rich H) that filters
last longer in pressure mode. I'm not using Raycor but I'm sure the
issues are similar. I've also been advised that operating the engine
fuel system in pressure mode is better because a leak will not
kill the engine, just leak some fuel. I'd never consider such an
approach with a gasoline engine, but with a diesel the risk seems
acceptable. I had a minor leak this summer and enfed up with a
couple gallons of bilge in the catch pan under the engine. No real
danger although a pain to clean up.

Doug
s/v Callista

"Glenn Ashmore" wrote in message
news:rL%Kb.29544$JD6.12079@lakeread04...
Racor strongly recommends that filters be operated under vacuum rather
than pressure. I believe the idea being safety. Better for a leak to
pull in air than spray fuel.

Doug Dotson wrote:
I am assembling my posihing system. Not clear whether it is better
to put the pump on the pressure side or the vacuum side. Having no
filter on the intake of the pump seems risky. I am using a 2 stage
approach. maybe putting the filter between the filters is an option.

Doug
s/v Callista



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Interesting. More tradeoffs. I have been told (by Rich H) that filters
last longer in pressure mode. I'm not using Raycor but I'm sure the
issues are similar. I've also been advised that operating the engine
fuel system in pressure mode is better because a leak will not
kill the engine, just leak some fuel. I'd never consider such an
approach with a gasoline engine, but with a diesel the risk seems
acceptable. I had a minor leak this summer and enfed up with a
couple gallons of bilge in the catch pan under the engine. No real
danger although a pain to clean up.

Doug
s/v Callista

"Glenn Ashmore" wrote in message
news:rL%Kb.29544$JD6.12079@lakeread04...
Racor strongly recommends that filters be operated under vacuum rather
than pressure. I believe the idea being safety. Better for a leak to
pull in air than spray fuel.

Doug Dotson wrote:
I am assembling my posihing system. Not clear whether it is better
to put the pump on the pressure side or the vacuum side. Having no
filter on the intake of the pump seems risky. I am using a 2 stage
approach. maybe putting the filter between the filters is an option.

Doug
s/v Callista



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com