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Fuel transfer/polishing pump
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 |
Fuel transfer/polishing pump
I don't think mine is a well built marine fuel tank. But is what I have.
I'll know more when I open it up this winter an peer inside. Doug "LaBomba182" wrote in message ... 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 |
Fuel transfer/polishing pump
I don't think mine is a well built marine fuel tank. But is what I have.
I'll know more when I open it up this winter an peer inside. Doug "LaBomba182" wrote in message ... 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 |
Fuel transfer/polishing pump/on a mini tear
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Fuel transfer/polishing pump/on a mini tear
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Fuel transfer/polishing pump
LaBomba182 wrote:
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? 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? Capt. Bill You don't want too fine a filter on the suction side. On Yanmars (and others), the lift pump can fail sooner due to the restriction. The idea is to do the cleaning in stages: 30 micron before the lift pump, 10 micron just before the high pressure pump. That said, we used 10 micron Racor elements for 8-9 seasons and 1000 hours with no significant ill effects except when we got a shot of algae. The on-engine filter never had any significant dirt on it (or in the bowl). That didn't change much when we went to 30 microns, as it happens. Note: We were able to limp home when the last filter on board clogged up during the algae incident: Pulled the filter and gently brushed junk off of the surface, and drained and cleaned the bowl (again). For a couple of hours, we could only pull half revs, but the fuel cleaned up nicely at reduced flow and (after draining the dead bodies from the bowl again) we had full power for the rest of the season. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
Fuel transfer/polishing pump
LaBomba182 wrote:
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? 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? Capt. Bill You don't want too fine a filter on the suction side. On Yanmars (and others), the lift pump can fail sooner due to the restriction. The idea is to do the cleaning in stages: 30 micron before the lift pump, 10 micron just before the high pressure pump. That said, we used 10 micron Racor elements for 8-9 seasons and 1000 hours with no significant ill effects except when we got a shot of algae. The on-engine filter never had any significant dirt on it (or in the bowl). That didn't change much when we went to 30 microns, as it happens. Note: We were able to limp home when the last filter on board clogged up during the algae incident: Pulled the filter and gently brushed junk off of the surface, and drained and cleaned the bowl (again). For a couple of hours, we could only pull half revs, but the fuel cleaned up nicely at reduced flow and (after draining the dead bodies from the bowl again) we had full power for the rest of the season. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
Fuel transfer/polishing pump
Ah. And I do believe you're right. Looks like I've started to equate all
petros in my old age.... Rufus Glenn Ashmore wrote: I believe that was for OIL not diesel. Rufus wrote: About 4 years ago there was a couple guys on the group who managed |
Fuel transfer/polishing pump
Ah. And I do believe you're right. Looks like I've started to equate all
petros in my old age.... Rufus Glenn Ashmore wrote: I believe that was for OIL not diesel. Rufus wrote: About 4 years ago there was a couple guys on the group who managed |
Fuel transfer/polishing pump
At Trawlersfest I had two lengthy discussions with paper towel filter advocates. Their theory is that the random oriented strands of the paper towel can trap any size particle, down to sub-micron, instead of acting like a sieve to pass through anything below a given size (they like to avoid mentioning that the "sieve" stops anything above it's rated size). Next time you get into this type of discussion, ask them how the fibers are held together so that they dont release particles under increasing differential pressure. You need a resin to hold the fibers together. Then ask them how much particulate bypasses the 'knife edge' seal that 'bites' into the end of the paper roll. Then get a glass of water, crumple up some of their paper roll, put it into the glass of water. Wait to see how long the paper takes to disintegrate into a slurry. Tell me where on this planet that there is NO water in fuel oil, either as free water or as an emulsion. ;-) |
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