bad generator fuel pump November 30, 2015, 11:25:54 am Yahoo Message Number: 157304After two and a half years, the pump has given up. Wondering about ethanol in fuel. Run gen at least every month. Will begin using fuel stabilizer when ever parked for a month or more.Anyone else having problems with their electric fuel pumps? What is your favorite way to remove those oem clinched fuel line clamps?Michael
Re: bad generator fuel pump Reply #1 – November 30, 2015, 02:59:56 pm Yahoo Message Number: 157307Michael,My '05 E-450 fuel pipe had a "soft" failure after 50 K miles on trip to Alaska. By soft failure I mean it continued to work, but no longer delivered fuel at sufficient pressure and flow necessary to go up steep hills at speed and lit an engine check light. I had the pump replaced in Anchorage. Make sure your fridge isn't working when the rear end is lifted up. We used dry ice to keep fridge contents cold.Alex Rutchka, SE #4, '05 MBSent from my iPad 2
Re: bad generator fuel pump Reply #2 – November 30, 2015, 05:54:56 pm Yahoo Message Number: 157312How did you diagnose a bad fuel pump? Does it simply not run, or does it run but makes a lot of clatter?Steve
Re: bad generator fuel pump Reply #3 – November 30, 2015, 06:22:46 pm Yahoo Message Number: 157313I'm confused by the subject line. Is the problem with the in-tank fuel pump for the main engine or the fuel pump for the generator (inside the generator)? Replacing the generator fuel pump in the Onan Microquiet is doable but a PITA. Replacing the main in-tank fuel pump is a major project.Art
Re: bad generator fuel pump Reply #4 – November 30, 2015, 07:55:46 pm Yahoo Message Number: 157314I had to replace the one in my O7 LD. I was looking at the forum on RV net and speculation was that they get very hot in the location inside the generator housing.For the OP did you check the fuel line? I forget the cut off year for the bad fuel line. The folks that run the LD Companion site posted my walk through of the replacement. http://lazydazearticles.blogspot.com/search/label/GeneratorAs for the clinched fuel clamps I used a small flat head screw driver and pliers to open the clamp. Then just slid it off the fuel line. Sadly I had to cut the fuel line on the tank side anyway as it had bonded to the fuel pump. I did not see a lot of slack in the generator fuel line so I purchased an inline fuel filter to splice a new line if needed. I did not need it this time. But if I must cut the line at the fuel pump next time I will need to use something. John
Re: How know generator fuel pump is bad? Reply #5 – December 01, 2015, 12:58:41 am Yahoo Message Number: 157317Hi, Gen will not start. Have battery voltage out of microprocessor controller when priming. Applying battery voltage directly to pump power in wire results in no pump buzz, nor fuel flow. Pump ground is good.Michael
Re: Which pump is the problem? Reply #6 – December 01, 2015, 01:01:22 am Yahoo Message Number: 157318Problem is with onan gen electric fuel pump.Michael
Re: bad generator fuel pump Reply #7 – December 01, 2015, 01:19:04 am Yahoo Message Number: 157320Thanks for the comments. The engine has only stopped on its own once and that was only after running a few minutes. I am having trouble with a 2013 model with only 20 hours on it. Sometimes the pump works and sometimes it doesn't. My current theory is that it has succumbed to varnish and gum since I am parked for long periods of time, and have not been using a fuel stabilizer. To remove the clinched clamps; I start out with a file, then a small saw, and finish with side cutters.Michael
Re: bad generator fuel pump Reply #8 – December 01, 2015, 08:35:29 am Yahoo Message Number: 157322I just got back from a months long trip out to the LD factory with some visiting and sightseeing along the way. Because we were following the Lewis and Clark expedition "The Journey of Discovery" a good deal of the time, I nick named our travels, "The Journey of Repairs". One issue was the generator. It would make an effort to start but wouldn't run. After three attempts to get it up and running, with the last being a replaced fuel line at Oregon light truck and RV in Medford, OR. The problem was the fuel line, but it still won't work. It was traced all the way back to the "sender", where the generator fuel siphon dips into the motorhome gas tank. My LD is now at the local Ford place for them to fix the sender/siphon. Steve, at Lazy Daze blames ethanol in gas for making fuel lines deteriorate. I don't know about that but there are certainly lots of places out west where the gas/ethanol combination is all you can get. I avoid it here. (Kentucky). I will post after the generator is fixed.Bonnie 2001 MB
Re: bad generator fuel pump Reply #9 – December 01, 2015, 11:18:53 am Yahoo Message Number: 157326If you remove the generator access door and look at the carburetor, towards the bottom is a largish Phillips head screw. This is the carb bowl drain. Draining the carb bowl during storage goes a long way in keeping the gen-set happy. When loosening or removing the screw, a little gas will drip down - just put a bowl down to catch it.With the gen set prime/start switch right there on the unit, you can push the prime button and instantly see if the bowl is filling up again. Without taking anything else apart, this will be and aid in trouble shooting. You can hear the pump working, but if there's not gas entering the bowl, the first thing to check is main fuel tank level. Next would be the fuel shut-off solenoid at the bottom of the carburetor bowl. The solenoid has two wires going to it, ground and positive. You'll need to remove the wires to unscrew the solenoid. It is easily cleaned of gunk and put back in service - no parts needed.When I did mine, I removed the whole carb to get at everything, as I didn't know it was just the solenoid causing the no run problem. So I'm not 100% sure the carb bowl can be removed without removing the carb itself, but I suspect it can be.In any case, if you get in the habbit of draining the bowl before longer storage, a gunked up fuel solenoid should not be of concern.The reason for the recommended monthly gen set run is three fold. To heat up and dry the generator windings, to exercise the motor, and importantly to remagnetize the generator's stator core. It is the residual magnetism in the core that allows the gen to start making electricity. If left too long with running, one may need to "flash the windings" to get the generator to function again. (Doable with the "flashing coil with two drill motors" trick (search internet using that term for instructions), but still a pain that's easy to avoid.best,bumper
Re: bad generator fuel pump Reply #10 – December 01, 2015, 03:24:53 pm Yahoo Message Number: 157339Don/Ted: This helpful response from bumper might be worth of adding to the genset area of The Companion.Chris
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Topic: bad generator fuel pump (Read 16 times)
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