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Topic: Fuel Pump - Oh So Lucky 🍀  (Read 324 times) previous topic - next topic
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Fuel Pump - Oh So Lucky 🍀
Yesterday we discovered our 2009 LD’s generator with 275 hours probably needs a new fuel pump and filter.  I’m simply overjoyed at the prospect of this project which will have to wait until it’s not 106 degrees in the shade.

Footnote:  The generator runs fine in cooler weather for hours and runs fine for about 20 minutes in real hot weather.   After 20 minutes the generator shuts down and won’t start until it’s cooled down.

There’s many similar reports on various RV forums with the same issue which was resolved with a new fuel pump and filter.
Re: Fuel Pump - Oh So Lucky 🍀
Reply #1 –
Ed, you just need to move to a cooler locale!   ;)
Greg & Victoria
2017 Mid-Bath  “Nocona” towing a manual 2015 Forester
Previously a 1985 TK
SKP #61264
Re: Fuel Pump - Oh So Lucky 🍀
Reply #4 –

Hi ED.  Try a new filter first. If it is partially plugged up it can overwork the pump. Easier and cheaper to change. There are good youtubes about changing the pump. It isn't the carburetor. Pretty easy to change the pump too.  I try to avoid using Onan name brands. They aren't worth the jacked up prices.  $26 for Amazon.com: BlueStars 149-2311 Electric 12V Fuel Pump - Fit for Onan Cummins...   or 10x as much for Onan.  RonB

As an Amazon Associate Lazy Daze Owners' Group earns from qualifying purchases.
RonB (Bostick) living in San Diego
Original owner of "Bluebelle" a '99 TKB
Re: Fuel Pump - Oh So Lucky 🍀
Reply #5 –
The generator cutting out in hot condition can also be caused by cracks in the rubber fuel lines, common in the early 2000s LDs.

Larry
Larry
2003 23.5' Front Lounge, since new.  Previously 1983 22' Front Lounge.
Tow vehicles  2020 Jeep Wrangler Rubicon, 2001 Jeep Cherokee
Photo Collection: Lazy Daze
Re: Fuel Pump - Oh So Lucky 🍀
Reply #6 –

Thank you Ron for your help.  For what it is worth, I ordered this fuel pump which seems to have the best reviews.

Amazon.com: Electric Fuel Pump E11007 Replacement for Airtex E11007 A029F889...

Secondly, I ordered an Onan filter because a RV tech that I follow on YouTube said he has had too many after market filters prematurely fail.  He’s had much better results with the Onan filter.

Finally, since I need to remove several parts to get to just the filter, I am going to replace both at the same time.  Replacing just the filter seems like extra work in the long run.

Note:  The website is not displaying apostrophes correctly.   See below.  I’ve changed several.

As an Amazon Associate Lazy Daze Owners' Group earns from qualifying purchases.
Re: Fuel Pump - Oh So Lucky 🍀
Reply #7 –
Quote from: Ed & Margee  - 
Thank you Ron for your help.  For what it is worth, I ordered this fuel pump which seemed to have the best reviews.

Amazon.com: Electric Fuel Pump E11007 Replacement for Airtex E11007 A029F889...
Finally, since I need to remove several parts to get to just the filter, I am going to replace both at the same time.  Replacing just the filter seems like extra work in the long run.
At this time you might consider adding a fuel shut off valve, to use to consume the fuel sitting in the carb during periods of inactivity. Before such an event, shut off the fuel valve with the engine running and let it run to fuel exhaustion.
As an Amazon Associate Lazy Daze Owners' Group earns from qualifying purchases.
2013 27’ Mid-Bath
2005 Honda CR-V
 
Re: Fuel Pump - Oh So Lucky 🍀
Reply #8 –
Quote from: Keith S  - 
At this time you might consider adding a fuel shut off valve, to use to consume the fuel sitting in the carb during periods of inactivity. Before such an event, shut off the fuel valve with the engine running and let it run to fuel exhaustion.


Another option is Onan has a very easy to use drain screw on every Microquiet 4000 I've seen...  it will drain the carb completely...  it's right below the altitude adjust knob on the float bowl.   If I used the "run dry" method, I'd still consider using the drain screw as it's hard to run a carb completely dry.

This next part is probably well-known by many of the experts here... 

I've also read a lot about "exercising" and I didn't really understand the full picture until recently.  Running the generator under load monthly is not just important from the "fresh gas" aspect...  I recently obtained an almost new generator to put in a friend's motorhome that a guy kept in his garage after removing it from his then near-new motorhome that was totaled in an accident about 12 years ago.  It had very low hours and looked new.  Still had the paper tags on it!  It wouldn't stay running very long because it didn't make any power.  Very frustrating. 

Luckily we tested it before installing...  eventually we discovered the problem turned out to be a black non-conductive film had formed on the slip rings.  I was told by an Onan mechanic to check for this because it sat for so long.  He said part of the "exercising" is to keep the slip rings clean.  It was a somewhat major job to get to and carefully polish the slip rings back to shiny new copper color, but that did the trick!  Original brushes looked new and were reused. 

1995 26.5 Island Bed