Dave, I think the little electric fuel pump needs fuel in it, to be able to pump. I don't think it can run dry like other style pumps. Sounds like you are very close to learning something. Keep at it.
Chuck S > On 09/27/2021 1:47 PM David Knecht via CnC-List <cnc-list@cnc-list.com> > wrote: > > > Update on fuel issues: I spent a few hours more on the fuel system last > weekend and things seem to be working, but unfortunately I am not sure what > fixed it or even if it is fixed. I replaced several more fuel lines and > removed the vacuum gauge I had installed between the tank and the Racor just > to simplify the possible vacuum leak points. All the hoses looked good, but > apparently you can’t always tell. With the hose end heated in hot water > trick, I was able to get the new hose on, but it was still a real battle in > tight places. The fittings were variable in size and style and some were > really challenging. After completing the connections, I turned on the fuel > pump, expecting it to pull fuel from the tank and fill the Racor bowl. It > did not. So I opened the Racor bowl, filled it and tested again, and the > bowl stayed full. I pulled the fuel level sensor so I could see inside the > tank, and I could see fuel coming out of the return tube from the engine. > That told me I was in fact pumping fuel. I then ran the engine for 30 min > and all seemed well. > I am hoping it is fixed but it is frustrating that I don’t know what was > wrong. Apparently, my “does the pump fill the bowl" test was not the correct > way to assess function. Is it possible that when the pump is full of air it > can’t pull enough vacuum to feed the Racor? Also, given that the original > problem occurred twice a week apart, with it working fine for hours in > between has me worried it will occur again. Intermittent problems are the > worst! Fingers crossed. > I plan to replace the Racor with a newer model with a gauge built into > the lid before next season. I found new filters for my 200 Turbine series, > but it seems they are getting harder to locate. Probably not going to run > out in my sailing lifetime, but the newer Racors seem a decent upgrade. Dave > > S/V Aries > 1990 C&C 34+ > New London, CT > > > > > > On Sep 25, 2021, at 3:36 PM, Korbey Hunt via CnC-List > <cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > wrote: > > > > When installing a hose to nipple fitting i recomnend using a hair > > dryer to warm the hose and liquid dish soap to lube the nipple barb. > > > > Get Outlook for Android https://aka.ms/AAb9ysg > > > > --------------------------------------------- > > From: cenelson via CnC-List <cnc-list@cnc-list.com > > mailto:cnc-list@cnc-list.com > > > Sent: Thursday, September 23, 2021 3:09:10 PM > > To: Stus-List <cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > > > Cc: cenelson <cenel...@aol.com mailto:cenel...@aol.com > > > Subject: Stus-List Re: Fuel pump > > > > Had a similar problem to yours several years ago. After doing most > > of what you have done, my diesel mechanic suggested just replacing the > > Racor MA 500(?) top plate since even a little over tightening can push the > > middle down enough that the O-ring on the circumference will leak enough > > that after running for a while the air inside it gets into the fuel lines. > > > > This was a cheap enough thing to do that I did it—along with a few > > other ‘fixes’ and the problem went away. > > > > Since it was not the only change I made, I can’t be certain that > > the new top plate solved the problem or if it was something else. > > > > Note I am pretty sure that the instructions for the Racor say to > > only hand tighten this plate or something similar—I now know why! > > > > Given how little extra tightening it would take at the Center to > > deflect the circumference/O-ring joint enough to suck air in, (probably a > > few microns could break the vacuum seal) and over time you have air bubbles > > that get to the engine or at least prevent fuel from getting to the engine. > > > > FWIW, > > > > Charlie Nelson > > > > > > Sent from the all new AOL app for iOS > > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapps.apple.com%2Fus%2Fapp%2Faol-news-email-weather-video%2Fid646100661&data=04%7C01%7C%7C4c63e0fcb6e74b16a67e08d97edecee9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637680317687570152%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=pXd69QGBqdzp8xQNHtBbEb4CypY8i%2Fmkeu8qWLgiw6w%3D&reserved=0 > > > > > > > > On Thursday, September 23, 2021, 12:36 PM, David Knecht via > > CnC-List <cnc-list@cnc-list.com mailto:cnc-list@cnc-list.com > wrote: > > > > > > > I meant bypass the Racor, turn on the pump > > and collect fuel into a secondary container to test. I agree that I would > > not run the engine that way. I am presuming that the flow of fuel through > > the filter should be a good test of the system since the problem was I was > > getting air into the primary Racor holder, so a vacuum leak likely > > somewhere. Dave > > > > > > S/V Aries > > > 1990 C&C 34+ > > > New London, CT > > > > > > <pastedGraphic.tiff> > > > > > > > > > > > > > On Sep 23, 2021, at 9:53 AM, Neil > > > Andersen <neil.eric.ander...@gmail.com > > > mailto:neil.eric.ander...@gmail.com > wrote: > > > > > > > > > > > > > > > > > > > > > > I would think that risky. If the Racor is the issue because > > > it is doing its job and there is particulate matter coming from the tank, > > > bypassing it will allow the matter to get to the engine. > > > > > > Neil Andersen > > > 1982 C&C 32, FoxFire > > > Rock Hall, MD 21661 > > > 484-354-8800 > > > > > > --------------------------------------------- > > > From: David Knecht via CnC-List <cnc-list@cnc-list.com > > > mailto:cnc-list@cnc-list.com > > > > Sent: Thursday, September 23, 2021 9:36:44 AM > > > To: CnC CnC discussion list <cnc-list@cnc-list.com > > > mailto:cnc-list@cnc-list.com > > > > Cc: David Knecht <davidakne...@gmail.com > > > mailto:davidakne...@gmail.com > > > > Subject: Stus-List Re: Fuel pump > > > > > > Hi Dennis- The Racor looks OK, but of course that says > > > nothing. I don’t know the Racor model but it is older since it does not > > > have the threaded top that you can add a gauge to. Since that is a more > > > expensive alteration, I thought I would replace the fuel lines first and > > > see if that fixes the problem. If not, I thought I would bypass the > > > Racor and see if it works that way and if so, replace the Racor itself. > > > Dave > > > > > > S/V Aries > > > 1990 C&C 34+ > > > New London, CT > > > > > > <pastedGraphic.tiff> > > > > > > > > > > > > > > > > On Sep 23, 2021, at 9:31 AM, > > > Dennis C. via CnC-List <cnc-list@cnc-list.com > > > mailto:cnc-list@cnc-list.com > wrote: > > > > > > > > What type of fuel filter do you have? If it's a Racor > > > > MA500, the top may be warped or the gasket may be cracked or displaced. > > > > Those are not infrequent issues with that filter. Either condition > > > > could result in air inleakage. > > > > > > > > > > > > -- > > > > Dennis C. > > > > Touche' 35-1 #83 > > > > Mandeville, LA > > > > Thanks to all of the subscribers that contributed to > > > > the list to help with the costs involved. If you want to show your > > > > support to the list - use PayPal to send contribution -- > > > > https://www.paypal.me/stumurray > > > > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.paypal.me%2Fstumurray&data=04%7C01%7C%7C4c63e0fcb6e74b16a67e08d97edecee9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637680317687570152%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=4GMncIqPj3xin2HNn1dqoauoQDm6F1dpLjvGFoYBfk4%3D&reserved=0 > > > > Thanks - Stu > > > > > > > > > > > > > > > > > > > > > > > Thanks to all of the subscribers that contributed to the list > > > to help with the costs involved. If you want to show your support to the > > > list - use PayPal to send contribution -- > > > https://www.paypal.me/stumurray > > > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.paypal.me%2Fstumurray&data=04%7C01%7C%7C4c63e0fcb6e74b16a67e08d97edecee9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637680317687580146%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=cdlAFays1s%2FIQu0AEgxrXq8vA0snpZ40DjzHCSxJn9o%3D&reserved=0 > > > Thanks - Stu > > > > > > > > > > > > > > > > > > > > > > Thanks to all of the subscribers that contributed to > > > the list to help with the costs involved. If you want to show your > > > support to the list - use PayPal to send contribution -- > > > https://www.paypal.me/stumurray Thanks - Stu > > > > > > Thanks to all of the subscribers that contributed to the list to help > with the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu >
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
